HaikuvsSonnet
Halbzuege (119)
1.e4Haiku
1. Observe Halbzug 1, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 20. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search13ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Establish central presence with e4 or d4. Develop Nf3/Nc3 and Bc4/Be2 rapidly. Maintain tempo to push Black into reactive play by move 6. Exploit first-move advantage to control center and accelerate piec…
- llm.plan30884ms · $0.0093
full reasoning
Phase: opening. Establish central presence with e4 or d4. Develop Nf3/Nc3 and Bc4/Be2 rapidly. Maintain tempo to push Black into reactive play by move 6. Exploit first-move advantage to control center and accelerate piece development, forcing Black into defense before middlegame. Critical: Black must respond to White's central claim; All 20 legal moves equally sound—choose opening style (1.e4, 1.d4, 1.c4, etc.); Early knight+bishop sequence (Nf3/Nc3→Bc4/Be2) determines opening character.
6. Candidates Candidates: e4 (Controls center d5-e4. Opens lines for bishop and queen. Classical tempo-maintaining move.) | d4 (Solid center control. Establishes d4-e5 stronghold. Strategic platform for long-term piece development.) |…
- chess.js.legal_moves0ms
- llm.candidates22732ms · $0.0108
full reasoning
Candidates: e4 (Controls center d5-e4. Opens lines for bishop and queen. Classical tempo-maintaining move.) | d4 (Solid center control. Establishes d4-e5 stronghold. Strategic platform for long-term piece development.) | Nf3 (Develops piece toward center. Enables Bc4/Be2 follow-up. Maintains flexibility and rapid development tempo.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e4 — e4 seizes immediate central space and forces Black's response. Opens queen and bishop lines, establishing aggressive tempo from move one.. Rejected: d2d4, g1f3.
- llm.reflect15729ms · $0.0041
9. Commit Commit e4 (e2e4).
2...e5Sonnet
1. Observe Halbzug 2, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 20. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Contest White's e4 pawn by establishing central presence. Aim to develop knights before bishops (Nf6 or ...e5/d5), then develop bishops toward active squares, and prepare kingside castling within 4-5 move…
- llm.plan14424ms · $0.0039
full reasoning
Phase: opening. Contest White's e4 pawn by establishing central presence. Aim to develop knights before bishops (Nf6 or ...e5/d5), then develop bishops toward active squares, and prepare kingside castling within 4-5 moves. Achieve a solid, symmetrical or semi-open structure with active piece play, no weaknesses in Black's camp, and a safe king via early castling. Critical: White's e4 pawn controls d5 and f5 — must be challenged or countered immediately; No threats yet from opponent; this is purely developmental; Memory heuristic 'central control': respond to e4 by fighting for d5 or e5 with a pawn or piece; Memory heuristic 'knights before bishops': Nf6 is the principled first move, developing a knight to its best square while attacking e4.
6. Candidates Candidates: Nf6 (Knights before bishops heuristic: develops to best square, attacks e4, prepares kingside castling.) | e5 (Central control heuristic: fights for e5, contests White's e4, leads to symmetrical King's Pawn s…
- chess.js.legal_moves0ms
- llm.candidates8567ms · $0.0035
full reasoning
Candidates: Nf6 (Knights before bishops heuristic: develops to best square, attacks e4, prepares kingside castling.) | e5 (Central control heuristic: fights for e5, contests White's e4, leads to symmetrical King's Pawn structures.) | c5 (Sicilian: challenges d4 expansion, avoids pawn symmetry, keeps solid structure without immediate weaknesses.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e5 — Central control heuristic: e5 immediately contests White's e4, establishes a symmetric pawn center, and allows natural development of both bishops and knights. No pawn weaknesses created, king safety una…
- llm.reflect9681ms · $0.0028
full reasoning
Final pick: e5 — Central control heuristic: e5 immediately contests White's e4, establishes a symmetric pawn center, and allows natural development of both bishops and knights. No pawn weaknesses created, king safety unaffected.. Rejected: g8f6, c7c5.
9. Commit Commit e5 (e7e5).
3.Nf3Haiku
1. Observe Halbzug 3, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 29. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Play Nf3 with tempo, prepare d4 to challenge Black's e5 center. Develop Nc3 and Bc4 rapidly. Force Black into defensive responses while building White's piece coordination. Maintain first-move advantage t…
- llm.plan26731ms · $0.0104
full reasoning
Phase: opening. Play Nf3 with tempo, prepare d4 to challenge Black's e5 center. Develop Nc3 and Bc4 rapidly. Force Black into defensive responses while building White's piece coordination. Maintain first-move advantage through turn 6. Leverage White's opening tempo to achieve superior piece development and spatial control before middlegame transition. Critical: White's first-move advantage enables tempo-gaining development sequence; Black's e5 pawn becomes vulnerable if d4 arrives without counterplay; Avoid premature f4 or queen moves—they lose tempo and give Black defensive resources.
6. Candidates Candidates: Nf3 (Develops with tempo, controls central squares, supports planned d4 and rapid piece coordination per plan.) | d4 (Directly challenges e5 pawn, seizes center initiative immediately, forces Black into defen…
- chess.js.legal_moves0ms
- llm.candidates18441ms · $0.0071
full reasoning
Candidates: Nf3 (Develops with tempo, controls central squares, supports planned d4 and rapid piece coordination per plan.) | d4 (Directly challenges e5 pawn, seizes center initiative immediately, forces Black into defensive response or pawn exchange.) | Bc4 (Rapid purposeful development toward f7 weakness, Italian setup foundation, supports tempo-gaining piece coordination strategy.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf3 — Develops with tempo, controls d4 and e5 squares, sets up d4 breakthrough next move. Flexibility + first-move advantage preserved.. Rejected: d2d4, f1c4.
- llm.reflect17439ms · $0.0060
9. Commit Commit Nf3 (g1f3).
4...Nf6Sonnet
1. Observe Halbzug 4, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 29. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Develop Nf6 immediately, attacking White's e4 pawn and controlling d5. Follow with bishop development and prepare short castling. Maintain symmetrical pawn tension on e5 vs e4. Achieve a solid Ruy Lopez o…
- llm.plan10064ms · $0.0037
full reasoning
Phase: opening. Develop Nf6 immediately, attacking White's e4 pawn and controlling d5. Follow with bishop development and prepare short castling. Maintain symmetrical pawn tension on e5 vs e4. Achieve a solid Ruy Lopez or Italian-type defense structure with active knights, bishops developed to natural squares, and king safety via early castling by move 6-7. Critical: White's Nf3 already attacks e5 — must reinforce e5 or counter-develop; Memory heuristic 'knights before bishops': Nf6 is the principled response, hitting e4 and developing with tempo; Memory heuristic 'central control': Nf6 contests e4/d5 squares immediately without pawn commitment; No immediate tactical threats — purely developmental phase, no rush needed.
6. Candidates Candidates: Nf6 (Knights before bishops heuristic: attacks e4 with tempo, controls d5, natural developing square.) | Nc6 (Central control heuristic: defends e5, develops toward center, keeps tension symmetrical.) | Bc5 (…
- chess.js.legal_moves0ms
- llm.candidates8502ms · $0.0034
full reasoning
Candidates: Nf6 (Knights before bishops heuristic: attacks e4 with tempo, controls d5, natural developing square.) | Nc6 (Central control heuristic: defends e5, develops toward center, keeps tension symmetrical.) | Bc5 (Italian setup: active bishop pointing at f2, supports e5, prepares castling without pawn commitment.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf6 — Knights before bishops heuristic: Nf6 attacks e4 with tempo, forcing White to defend or advance. Controls d5, develops naturally, and prepares kingside castling. Central control heuristic satisfied — co…
- llm.reflect10096ms · $0.0029
full reasoning
Final pick: Nf6 — Knights before bishops heuristic: Nf6 attacks e4 with tempo, forcing White to defend or advance. Controls d5, develops naturally, and prepares kingside castling. Central control heuristic satisfied — contests e4/d5 immediately without pawn commitment.. Rejected: b8c6, f8c5.
9. Commit Commit Nf6 (g8f6).
5.d4Haiku
1. Observe Halbzug 5, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 27. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search11ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Push d4 to challenge Black's e5 pawn and open bishop diagonals. After exd4, recapture with tempo (Nxd4 or similar). Develop Nc3, Bc4, castle kingside by move 6. Force Black into defensive posture while Wh…
- llm.plan25269ms · $0.0098
full reasoning
Phase: opening. Push d4 to challenge Black's e5 pawn and open bishop diagonals. After exd4, recapture with tempo (Nxd4 or similar). Develop Nc3, Bc4, castle kingside by move 6. Force Black into defensive posture while White builds piece coordination and spatial edge. Control center d4-e5, develop rapidly with tempo gains, establish superior piece coordination and space advantage before middlegame. Critical: Black's Nf6+e5 are solid but reactive; no immediate counterplay or tactics available; d4 forces Black's hand: e5 becomes liability if Black takes (recapture centralizes White knight with initiative); Avoid queen moves and f4 early—lose tempo, expose e4, invite Nxe4 or Bc5 tactics that equalize.
6. Candidates Candidates: d4 (Challenges e5 pawn, opens bishop lines, forces Black's hand. Recapture Nxd4 centralizes knight with tempo.) | Nd4 (Attacks e5 from outpost, centralizes knight, forces e5 into liability. Black's position c…
- chess.js.legal_moves0ms
- llm.candidates38254ms · $0.0183
full reasoning
Candidates: d4 (Challenges e5 pawn, opens bishop lines, forces Black's hand. Recapture Nxd4 centralizes knight with tempo.) | Nd4 (Attacks e5 from outpost, centralizes knight, forces e5 into liability. Black's position crumbles.) | Nxe5 (Seizes e5 pawn, plants knight on dominant square, controls center. Black must respond defensively.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d4 — d4 forces Black's hand: exd4 allows Nxd4 (centralized knight with tempo). Most forcing continuation. Controls center, opens bishop diagonal.. Rejected: f3d4, f3e5.
- llm.reflect19371ms · $0.0074
9. Commit Commit d4 (d2d4).
6...Bc5Sonnet
1. Observe Halbzug 6, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 28. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search15ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Develop bishop to c5 or e7, reinforce e5, prepare short castling by move 5-6. Knights are out (Nf6 done), bishops must follow — memory heuristic 'knights before bishops' satisfied, now activate light-squa…
- llm.plan12903ms · $0.0050
full reasoning
Phase: opening. Develop bishop to c5 or e7, reinforce e5, prepare short castling by move 5-6. Knights are out (Nf6 done), bishops must follow — memory heuristic 'knights before bishops' satisfied, now activate light-squared bishop. Maintain central tension e5 vs e4/d4. Reach a solid, castled middlegame with active minor pieces and no structural weaknesses, then exploit White's central overextension if d4 becomes isolated or overadvanced. Critical: White has d4+e4 pawn center — must challenge or blockade before it expands further; e5 pawn needs indirect support; Nf6 attacks e4 creating counter-tension; Memory: 'central control' — Bc5 hits f2 and contests d4 diagonal, Nf6 already pressures e4; Memory: 'knights before bishops' — Nf6 done, bishop development is now the priority; Queen must stay home (memory: 'queen late'), no early queen sorties; King safety: castle kingside within 2 moves — no weaknesses on kingside pawn structure.
6. Candidates Candidates: Bc5 (Activates light-squared bishop hitting f2, contests d4 diagonal. 'Knights before bishops' satisfied — bishop development is now priority.) | Nc6 (Develops knight, supports e5 pawn indirectly, maintains c…
- chess.js.legal_moves0ms
- llm.candidates8867ms · $0.0036
full reasoning
Candidates: Bc5 (Activates light-squared bishop hitting f2, contests d4 diagonal. 'Knights before bishops' satisfied — bishop development is now priority.) | Nc6 (Develops knight, supports e5 pawn indirectly, maintains central tension. Pawn structure stays clean — no weaknesses created.) | Bb4+ (Develops bishop with tempo via check, forces White king or interposition. Central control maintained while gaining initiative.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bc5 — Satisfies 'knights before bishops' — bishop now active. Bc5 targets f2, contests d4 diagonal directly, and enables kingside castling within 1-2 moves. Central control heuristic: bishop actively challeng…
- llm.reflect9029ms · $0.0031
full reasoning
Final pick: Bc5 — Satisfies 'knights before bishops' — bishop now active. Bc5 targets f2, contests d4 diagonal directly, and enables kingside castling within 1-2 moves. Central control heuristic: bishop actively challenges White's d4 pawn complex.. Rejected: b8c6, f8b4.
9. Commit Commit Bc5 (f8c5).
7.Bc4Haiku
1. Observe Halbzug 7, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 37. Criticality: 0.40.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search15ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Maintain d4 tension. If exd4, recapture Nxd4 centralizing with tempo. Develop Bc4 (threatens f7), then Nc3 and O-O. Force Black into reaction. Convert spatial advantage (e4+d4 control) into superior piece…
- llm.plan26228ms · $0.0123
full reasoning
Phase: opening. Maintain d4 tension. If exd4, recapture Nxd4 centralizing with tempo. Develop Bc4 (threatens f7), then Nc3 and O-O. Force Black into reaction. Convert spatial advantage (e4+d4 control) into superior piece coordination and initiative. Achieve dominant setup before middlegame transition. Critical: d4 under capture—recapture must centralize with tempo via Nxd4, not passively restore pawn; Black's Bc5+Nf6 already active; offset with Bc4 (f7 threat) and rapid Nc3/O-O sequencing; f7 vulnerability from Italian pattern—Bc4 creates immediate tactical pressure.
6. Candidates Candidates: Bc4 (Develops with tempo, threatens f7 weakness, forces Black response immediately) | Nxe5 (Centralizes knight with capture, maintains initiative, activates piece with tempo) | dxe5 (Solid pawn capture, maint…
- chess.js.legal_moves0ms
- llm.candidates49449ms · $0.0274
full reasoning
Candidates: Bc4 (Develops with tempo, threatens f7 weakness, forces Black response immediately) | Nxe5 (Centralizes knight with capture, maintains initiative, activates piece with tempo) | dxe5 (Solid pawn capture, maintains strong center, preserves d4 tension)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bc4 — Threatens f7 immediately, forces Black response, develops with tempo. Establishes dominant setup per plan.. Rejected: f3e5, d4e5.
- llm.reflect27387ms · $0.0140
9. Commit Commit Bc4 (f1c4).
8...O-OSonnet
1. Observe Halbzug 8, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 32. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search21ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search12ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Complete development by castling short within 2 moves. Bishop already on c5 (FEN confirms Bc5). Castle kingside immediately to connect rooks and secure king. After castling, maintain e5 tension and prepar…
- llm.plan14433ms · $0.0059
full reasoning
Phase: opening. Complete development by castling short within 2 moves. Bishop already on c5 (FEN confirms Bc5). Castle kingside immediately to connect rooks and secure king. After castling, maintain e5 tension and prepare ...d6 or ...d5 break if center overextends. Reach a castled, solid middlegame with Bc5 active on the a7-g1 diagonal, Nf6 pressuring e4, and e5 holding — then challenge White's d4+e4 center with ...d6 followed by ...Na6-c5 or direct ...d5 when timed correctly. Critical: King still uncastled — priority one per memory heuristic 'king safety first'; 32 legal moves but castling is the principled choice; White d4+e4 center: memory heuristic 'central control' demands we contest it — Bc5 already eyes d4, Nf6 attacks e4, this pressure is sufficient for now without overreaching; Bc5 is active on key diagonal targeting f2 and d4 — no reason to move it; knights-before-bishops heuristic already satisfied (Nf6 done, bishop developed); No immediate tactical threats from White requiring defensive response; After castling: watch for d4-d5 push which would attack Nf6 and gain space — plan ...d6 to solidify e5 pawn.
6. Candidates Candidates: O-O (King safety first — connects rooks, removes king from center, fulfills priority one heuristic before any central action.) | d6 (Solidifies e5 pawn, controls central pawn structure, prepares ...Na6-c5 or …
- chess.js.legal_moves0ms
- llm.candidates8893ms · $0.0037
full reasoning
Candidates: O-O (King safety first — connects rooks, removes king from center, fulfills priority one heuristic before any central action.) | d6 (Solidifies e5 pawn, controls central pawn structure, prepares ...Na6-c5 or ...d5 break — sound positional move.) | Nc6 (Develops last minor piece, supports e5, improves worst piece per positional heuristic — natural development before committing.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: O-O — King safety first — uncastled king is the position's biggest liability. Castling connects rooks, removes king from the e-file, and fulfills the priority-one heuristic before any central action. Bc5 rema…
- llm.reflect8899ms · $0.0029
full reasoning
Final pick: O-O — King safety first — uncastled king is the position's biggest liability. Castling connects rooks, removes king from the e-file, and fulfills the priority-one heuristic before any central action. Bc5 remains active on the a7-g1 diagonal.. Rejected: d7d6, b8c6.
9. Commit Commit O-O (e8g8).
9.Bxf7+Haiku
1. Observe Halbzug 9, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 43. Criticality: 0.40.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search12ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search10ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Consolidate d4 tension with Nxd4 if exd4 arrives (centralize with tempo). Develop Nc3, castle O-O, and create tactical pressure on f7 via Bc4 before Black stabilizes piece coordination. Build dominant cen…
- llm.plan26298ms · $0.0108
full reasoning
Phase: opening. Consolidate d4 tension with Nxd4 if exd4 arrives (centralize with tempo). Develop Nc3, castle O-O, and create tactical pressure on f7 via Bc4 before Black stabilizes piece coordination. Build dominant central setup (e4+d4+Nc3+O-O+Bc4) with tempo advantage, converting spatial control and f7 vulnerability into forcing moves that constrain Black's piece play. Critical: d4 under capture—Nxd4 recapture centralizes with tempo, passive recapture loses initiative; f7 is weak—Bc4 threatens immediately, forces Black defensive response; White uncastled—O-O becomes urgent after Nc3 to consolidate king safety; Black's Nf6+Bc5 are active but unsupported—move order tempo decides who controls d5/e5 long-term.
6. Candidates Candidates: Bxf7+ (Forcing check wins f7 pawn, exposes Black king. After Kh8 Nxe5 White dominates.) | Nc3 (Develops knight, supports d4, prepares O-O. Builds central setup with tempo.) | O-O (Castles kingside to consolid…
- chess.js.legal_moves0ms
- llm.candidates110549ms · $0.0740
full reasoning
Candidates: Bxf7+ (Forcing check wins f7 pawn, exposes Black king. After Kh8 Nxe5 White dominates.) | Nc3 (Develops knight, supports d4, prepares O-O. Builds central setup with tempo.) | O-O (Castles kingside to consolidate king position. Completes planned central setup.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxf7+ — Bxf7+ forces Kh8, then Nxe5 wins two pawns with dominant position. Immediate forcing tactic beats slow methodical build-up.. Rejected: b1c3, e1g1.
- llm.reflect43271ms · $0.0257
9. Commit Commit Bxf7+ (c4f7).
10...Rxf7Sonnet
1. Observe Halbzug 10, Schwarz am Zug. Phase: Eroeffnung. Weiss +1 Punkte. Legale Zuege: 3. Schach! Criticality: 0.75.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search12ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Survive the Bxf7+ shock: resolve the check with minimal structural damage, then consolidate king shelter and recoup the sacrificed material deficit over the next 3 moves. Neutralize White's initiative by …
- llm.plan24284ms · $0.0163
full reasoning
Phase: opening. Survive the Bxf7+ shock: resolve the check with minimal structural damage, then consolidate king shelter and recoup the sacrificed material deficit over the next 3 moves. Neutralize White's initiative by finding the safest king square, re-activate the Bc5 and Nf6, and transition into a playable middlegame despite the disrupted kingside pawn structure. Critical: CHECK on g8 — White Bf7+ forces immediate response, only 3 legal moves exist; Memory heuristic KING SAFETY FIRST: resolving check overrides all development logic; the Bc5 diagonal and Nf6 pressure are secondary until king is safe; Memory heuristic OPENING CENTRAL CONTROL: after resolving check, e5 must be protected — losing it hands White a dominant d4+e4 center unopposed; White's Nf3 can fork or press via e5 if Black misplays; Nd4 or Ng5 threats must be anticipated; Material: White gave a bishop for the f-pawn — if Black survives the immediate tactics, the extra material matters.
6. Candidates Candidates: Rxf7 (Recaptures bishop, restores material balance; rook on f7 defends king and keeps central pawns stable.) | Kh8 (King safety first — sidesteps check without pawn structure damage; Rf8 remains active.) | Kx…
- chess.js.legal_moves0ms
- llm.candidates8916ms · $0.0036
full reasoning
Candidates: Rxf7 (Recaptures bishop, restores material balance; rook on f7 defends king and keeps central pawns stable.) | Kh8 (King safety first — sidesteps check without pawn structure damage; Rf8 remains active.) | Kxf7 (Captures bishop, gains material, but exposes king on f7 against Nf3 pressure — riskier.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rxf7 — Recaptures bishop restoring material balance, places rook on active f7 square defending king, avoids king exposure. King safety first: rook cover on f7 is structurally sounder than exposing the king.. …
- llm.reflect10411ms · $0.0029
full reasoning
Final pick: Rxf7 — Recaptures bishop restoring material balance, places rook on active f7 square defending king, avoids king exposure. King safety first: rook cover on f7 is structurally sounder than exposing the king.. Rejected: g8h8, g8f7.
9. Commit Commit Rxf7 (f8f7).
11.Nxe5Haiku
1. Observe Halbzug 11, Weiss am Zug. Phase: Eroeffnung. Schwarz +2 Punkte. Legale Zuege: 35. Criticality: 0.25.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search18ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search15ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Play Nc3 to defend d4 and control the center. Prepare Bc4 to attack f7 and force Black into defensive mode. Castle kingside to secure the king before Black consolidates. Establish Nc3-anchored central sup…
- llm.plan41263ms · $0.0204
full reasoning
Phase: opening. Play Nc3 to defend d4 and control the center. Prepare Bc4 to attack f7 and force Black into defensive mode. Castle kingside to secure the king before Black consolidates. Establish Nc3-anchored central superiority (d4 supported, e4 secured), weaponize the f7 weakness via Bc4 tempo, then castle and convert space into attacking chances. Critical: d4 under fire from e5 — Nc3 defends it while developing with tempo; if Black plays exd4, Nxd4 recaptures with central knight placement; f7 is soft — Bc4 next move attacks directly, forces Black defensive response (−a6 or −a5), constrains piece play; King on e1 uncastled — O-O is urgent after Nc3, before Black stabilizes (Bc5 + Nf6 + Bc8 coordination).
6. Candidates Candidates: Nc3 (Defends d4 while developing with tempo. Establishes Nc3-anchored central superiority per plan, enables Nxd4 recapture if Black plays exd4.) | dxe5 (Removes the direct attacker of d4, opens lines, simplif…
- chess.js.legal_moves0ms
- llm.candidates101890ms · $0.0651
full reasoning
Candidates: Nc3 (Defends d4 while developing with tempo. Establishes Nc3-anchored central superiority per plan, enables Nxd4 recapture if Black plays exd4.) | dxe5 (Removes the direct attacker of d4, opens lines, simplifies position. Tactical response to Black's e5 weakness.) | Nxe5 (Centralizes knight on dominant outpost, removes e5 pawn, seizes space. Aggressive alternative to slow defense.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxe5 — e5 pawn is undefended. Captures hanging material cleanly, centralizes knight on dominant square. Haiku takes hanging pieces immediately.. Rejected: b1c3, d4e5.
- llm.reflect108036ms · $0.0620
9. Commit Commit Nxe5 (f3e5).
12...Bb4+Sonnet
1. Observe Halbzug 12, Schwarz am Zug. Phase: Eroeffnung. Schwarz +1 Punkte. Legale Zuege: 32. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search17ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Stabilize the king on g8 (post-Bxf7+ disruption), reactivate the Bc5 and Nf6, and seek to recoup material by pressuring the Ne5 while transitioning to a solid middlegame structure. Survive White's sacrifi…
- llm.plan14895ms · $0.0052
full reasoning
Phase: opening. Stabilize the king on g8 (post-Bxf7+ disruption), reactivate the Bc5 and Nf6, and seek to recoup material by pressuring the Ne5 while transitioning to a solid middlegame structure. Survive White's sacrificial initiative, consolidate Black's extra material if applicable, and convert the opening into a playable middlegame where Black's bishop pair and central pawn majority become long-term assets. Critical: King on g8 is exposed — White's Ne5 and open e/f-files create ongoing pressure; castling rights are gone; Memory heuristic KING SAFETY FIRST: all development logic is subordinate until the king is sheltered behind pawns on g8/h7/g6; Memory heuristic KNIGHTS BEFORE BISHOPS: Nf6 must be re-activated to contest the Ne5 — the knight controls key central squares and attacks Ne5 directly; Ne5 on a powerful central outpost threatens d7 and f7 — must be challenged or the initiative compounds; Black's Bc5 remains active on the a7-g1 diagonal and can pressure d4 if the center opens.
6. Candidates Candidates: Nxe4 (Directly recaptures material and challenges Ne5's central dominance; king safety improves by reducing White's attacking pieces.) | Bb4+ (Forcing check displaces White king, disrupting castling rights an…
- chess.js.legal_moves0ms
- llm.candidates9843ms · $0.0037
full reasoning
Candidates: Nxe4 (Directly recaptures material and challenges Ne5's central dominance; king safety improves by reducing White's attacking pieces.) | Bb4+ (Forcing check displaces White king, disrupting castling rights and relieving immediate pressure per KING SAFETY FIRST heuristic.) | d6 (Kicks Ne5 from its powerful outpost, improving pawn structure and re-activating KNIGHTS BEFORE BISHOPS sequence safely.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bb4+ — Forces White king to move (no interpose saves castling cleanly), directly applying KING SAFETY FIRST by denying White's own king shelter while gaining tempo on the Ne5 complex.. Rejected: f6e4, d7d6.
- llm.reflect9325ms · $0.0030
9. Commit Commit Bb4+ (c5b4).
13.Nc3Haiku
1. Observe Halbzug 13, Weiss am Zug. Phase: Eroeffnung. Schwarz +1 Punkte. Legale Zuege: 7. Schach! Criticality: 0.55.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search14ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Defend d4 with Nc3, prepare Bc4 to strike f7, castle kingside. Convert space advantage + Ne5 into attacking play while Black's king castled kingside remains soft. Establish Nc3-anchored center control (d4…
- llm.plan29817ms · $0.0138
full reasoning
Phase: opening. Defend d4 with Nc3, prepare Bc4 to strike f7, castle kingside. Convert space advantage + Ne5 into attacking play while Black's king castled kingside remains soft. Establish Nc3-anchored center control (d4 secured), pivot to Bc4 attacking f7 weakness, castle for king safety, then prosecute kingside attack with rook pressure on the f-file. Critical: d4 pawn currently undefended — Black can play exd4; must play Nc3 to defend; f7 is weak and soft after Ne5 + planned Bc4 — forces Black into defensive mode; Black's Bb4 pins Nb1 — Nc3 development resolves this and develops with purpose.
6. Candidates Candidates: Nc3 (Develops knight with tempo, defends d4 pawn, unpins from Bb4 pin. Controls center.) | c3 (Defends d4 pawn from behind, restricts Black's Bb4, solidifies center control and prepares castling.) | Bd2 (Deve…
- chess.js.legal_moves0ms
- llm.candidates32340ms · $0.0164
full reasoning
Candidates: Nc3 (Develops knight with tempo, defends d4 pawn, unpins from Bb4 pin. Controls center.) | c3 (Defends d4 pawn from behind, restricts Black's Bb4, solidifies center control and prepares castling.) | Bd2 (Develops bishop piece, unpins the Nb1 from Bb4 pressure. Prepares castling and improves coordination.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nc3 — Defends d4 (Black threatens exd4), unpins from Bb4, develops with tempo, controls center. Sets up Bc4 attacking f7 next move. Tactical necessity.. Rejected: c2c3, c1d2.
- llm.reflect13905ms · $0.0043
9. Commit Commit Nc3 (b1c3).
14...Bxc3+Sonnet
1. Observe Halbzug 14, Schwarz am Zug. Phase: Eroeffnung. Schwarz +1 Punkte. Legale Zuege: 33. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search17ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Stabilize the king on g8, activate Rf7 to defend against Ne5 threats, develop Bb7 or Bc8 to cover weak squares, and challenge White's Ne5 with d6 or Nc6 to regain structural footing. Survive White's initi…
- llm.plan13598ms · $0.0055
full reasoning
Phase: opening. Stabilize the king on g8, activate Rf7 to defend against Ne5 threats, develop Bb7 or Bc8 to cover weak squares, and challenge White's Ne5 with d6 or Nc6 to regain structural footing. Survive White's initiative by eliminating the dangerous Ne5, consolidate Black's material advantage (likely a pawn), and transition to a middlegame where the bishop pair and central pawn majority outweigh White's temporary piece activity. Critical: Ne5 on e5 is the primary threat — it targets d7, f7-area, and coordinates with Nc3; must be challenged or neutralized immediately; King on g8 has no castling rights and is exposed on the g-file; Rf7 provides some cover but White's open center is dangerous; Memory heuristic CENTRAL CONTROL: d6 push evicts Ne5 and reclaims center — consistent with both king safety and opening principles; Memory heuristic KNIGHTS BEFORE BISHOPS: Nc6 develops with tempo attacking Ne5, fits the principle of knight activation; Own weakness: Bc8 is undeveloped and the d7-pawn is backward; White can pile pressure on d7 with Qd3 or Bf4.
6. Candidates Candidates: Bxc3+ (Eliminates Nc3 support for Ne5, forces bxc3 doubling White's pawns — structural damage consistent with TRADE ONLY WHEN YOU GAIN.) | d6 (CENTRAL CONTROL heuristic: evicts the dangerous Ne5 immediately, …
- chess.js.legal_moves0ms
- llm.candidates9977ms · $0.0038
full reasoning
Candidates: Bxc3+ (Eliminates Nc3 support for Ne5, forces bxc3 doubling White's pawns — structural damage consistent with TRADE ONLY WHEN YOU GAIN.) | d6 (CENTRAL CONTROL heuristic: evicts the dangerous Ne5 immediately, reclaims center, addresses the primary threat.) | Nc6 (KNIGHTS BEFORE BISHOPS: develops with tempo attacking Ne5, consistent with king safety by removing the e5 outpost threat.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxc3+ — Eliminates Nc3 — Ne5's key support — while forcing bxc3, doubling White's c-pawns permanently. The check gains tempo. TRADE ONLY WHEN YOU GAIN: structural damage (doubled pawns, weakened queenside) pl…
- llm.reflect9887ms · $0.0034
full reasoning
Final pick: Bxc3+ — Eliminates Nc3 — Ne5's key support — while forcing bxc3, doubling White's c-pawns permanently. The check gains tempo. TRADE ONLY WHEN YOU GAIN: structural damage (doubled pawns, weakened queenside) plus removing the defender of Ne5 outweighs bishop loss.. Rejected: d7d6, b8c6.
9. Commit Commit Bxc3+ (b4c3).
15.bxc3Haiku
1. Observe Halbzug 15, Weiss am Zug. Phase: Eroeffnung. Schwarz +4 Punkte. Legale Zuege: 5. Schach! Criticality: 0.60.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search13ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Execute the forcing tactic Nxf7, winning Black's rook on f7. The Ne5 is powerfully centralized and attacks an undefended piece. After winning this exchange, convert the material swing from -4 to +2 and pr…
- llm.plan58785ms · $0.0334
full reasoning
Phase: opening. Execute the forcing tactic Nxf7, winning Black's rook on f7. The Ne5 is powerfully centralized and attacks an undefended piece. After winning this exchange, convert the material swing from -4 to +2 and press the advantage. Win the rook with Nxf7, consolidate material advantage, castle kingside for king safety, and convert to a decisive technical win. Black's king becomes exposed after Kxf7. Critical: Black rook on f7 attacked by Ne5 is the immediate target; Nxf7 is forcing and wins the exchange (rook for knight); After Kxf7, Black's king is drawn forward and vulnerable; White must castle soon after to avoid back-rank weakness.
6. Candidates Candidates: bxc3 (Wins Black's bishop outright. Solves check, gains material decisively. Strongest tactic.) | Bd2 (Blocks check, develops bishop to active square, prepares castling. Solid positional choice.) | Qd2 (Block…
- chess.js.legal_moves0ms
- llm.candidates30404ms · $0.0165
full reasoning
Candidates: bxc3 (Wins Black's bishop outright. Solves check, gains material decisively. Strongest tactic.) | Bd2 (Blocks check, develops bishop to active square, prepares castling. Solid positional choice.) | Qd2 (Blocks check while centralizing queen. Controls d4 and keeps tactical options open.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: bxc3 — Wins Black's bishop outright while removing the checking piece. Material gain (+2 net) decisively swings position before the Ne5 exploits the hanging rook on f7.. Rejected: c1d2, d1d2.
- llm.reflect25807ms · $0.0122
9. Commit Commit bxc3 (b2c3).
16...Nd5Sonnet
1. Observe Halbzug 16, Schwarz am Zug. Phase: Mittelspiel. Schwarz +1 Punkte. Legale Zuege: 26. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search14ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Neutralize the Ne5 outpost immediately via Nbd7 or d6, consolidate Black's material edge, then transition to a favorable endgame by exploiting White's IQP on d4. Activate Ra8 toward the center (d8/e8) …
- llm.plan36220ms · $0.0260
full reasoning
Phase: middlegame. Neutralize the Ne5 outpost immediately via Nbd7 or d6, consolidate Black's material edge, then transition to a favorable endgame by exploiting White's IQP on d4. Activate Ra8 toward the center (d8/e8) once the Ne5 is evicted. Convert the material advantage by eliminating White's only active piece (Ne5), blockading d4 as a long-term weakness per the IQP heuristic, and using the centralized Rf7 + Ra8 battery to dominate open files. Critical: Ne5 on its strong outpost (memory: MIDDLE weak squares outpost) must be challenged — it targets d7 and coordinates with e4/d4 center; d6 or Nbd7 are candidate responses; White's d4 pawn is an IQP (memory: MIDDLE IQP) — after Ne5 is evicted, blockading d5 with a knight or controlling d5 square is the structural goal; Black king on g8 is safe short-term but Ra8 is dormant — Ra8 to d8 or e8 addresses both development and open-file control (memory: MIDDLE open file rooks); White can castle kingside next move, activating Rh1 — priority to reduce White's initiative before that happens; No speculative counterplay; king safety first, then consolidate the plus-one material.
6. Candidates Candidates: Nd5 (Evicts Ne5 by threatening exchange, blockades IQP on d4 — perfect outpost per IQP heuristic.) | d6 (Directly attacks Ne5 strong outpost, opens c8-bishop, consolidates center without pawn weakness.) | Qe7…
- chess.js.legal_moves0ms
- llm.candidates9079ms · $0.0036
full reasoning
Candidates: Nd5 (Evicts Ne5 by threatening exchange, blockades IQP on d4 — perfect outpost per IQP heuristic.) | d6 (Directly attacks Ne5 strong outpost, opens c8-bishop, consolidates center without pawn weakness.) | Qe7 (Develops queen, pressures Ne5, prepares Ra8 to d8 for open-file rook activation.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nd5 — Nd5 evicts Ne5 by threatening exchange while landing on the ideal IQP blockade square. Per IQP heuristic, d5 is the structural target — knight here neutralizes White's only active piece and permanently …
- llm.reflect8967ms · $0.0030
full reasoning
Final pick: Nd5 — Nd5 evicts Ne5 by threatening exchange while landing on the ideal IQP blockade square. Per IQP heuristic, d5 is the structural target — knight here neutralizes White's only active piece and permanently blockades the d4 pawn.. Rejected: d7d6, d8e7.
9. Commit Commit Nd5 (f6d5).
17.Nxf7Haiku
1. Observe Halbzug 17, Weiss am Zug. Phase: Mittelspiel. Schwarz +1 Punkte. Legale Zuege: 38. Criticality: 0.25.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search17ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Win the exchange (rook for knight, +2 material) via Nxf7. Force Black's king forward to f7, creating exposure. Gain decisive material advantage. After winning exchange, consolidate with castling kingsi…
- llm.plan30818ms · $0.0149
full reasoning
Phase: middlegame. Win the exchange (rook for knight, +2 material) via Nxf7. Force Black's king forward to f7, creating exposure. Gain decisive material advantage. After winning exchange, consolidate with castling kingside. Convert superior material through technical play in resulting endgame. Critical: Ne5 attacks undefended rook f7; Nxf7 is forcing—Kxf7 only legal response; Black king drawn to f7 becomes vulnerable to follow-up tactics.
6. Candidates Candidates: Nxf7 (Wins exchange (rook for knight) forcing Kxf7. King exposed on f7. Plan-critical, decisively winning.) | exd5 (Removes defending knight. Simplifies center, opens e-file. Supports endgame conversion plan.…
- chess.js.legal_moves0ms
- llm.candidates45259ms · $0.0272
full reasoning
Candidates: Nxf7 (Wins exchange (rook for knight) forcing Kxf7. King exposed on f7. Plan-critical, decisively winning.) | exd5 (Removes defending knight. Simplifies center, opens e-file. Supports endgame conversion plan.) | Nxd7 (Removes pawn, forces simplification. Maintains advantage and initiative. Consolidates winning position.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxf7 — Wins exchange (rook for knight), forces Kxf7 exposing Black king. Creates tactical follow-ups. Forcing and materially decisive.. Rejected: e4d5, e5d7.
- llm.reflect29278ms · $0.0151
9. Commit Commit Nxf7 (e5f7).
18...Kxf7Sonnet
1. Observe Halbzug 18, Schwarz am Zug. Phase: Mittelspiel. Weiss +4 Punkte. Legale Zuege: 28. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search19ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search10ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Evict the Nf7 intruder immediately — it sits on f7 attacking our king and rook. Priority: capture or neutralize Nf7, restore king safety, then consolidate material advantage. Once Nf7 is removed, activ…
- llm.plan13453ms · $0.0056
full reasoning
Phase: middlegame. Evict the Nf7 intruder immediately — it sits on f7 attacking our king and rook. Priority: capture or neutralize Nf7, restore king safety, then consolidate material advantage. Once Nf7 is removed, activate rooks on open files and target White's IQP on d4. Convert Black's material edge (if Nf7 is captured) into a winning endgame by blockading White's IQP on d4 with a knight or bishop, dominating open files with rooks per the open-file rook heuristic, and keeping White's king weak. Critical: Nf7 on f7 is White's active piece — it forks Rh8 and Qd8 and disrupts king safety; capturing it is the first priority; White's IQP on d4 (memory: MIDDLE isolated pawn IQP) is a long-term weakness — blockade square d5 must be secured after Nf7 is removed; Black's knight on d5 is well-centralized (memory: MIDDLE weak squares outpost) and should be maintained as a blockader on d5 against White's IQP; King on g8 is exposed — open file dangers and back-rank vulnerability must be addressed before launching counterplay.
6. Candidates Candidates: Kxf7 (Evicts the Nf7 intruder immediately — king safety first heuristic demands capturing the forking piece.) | Nxc3 (Wins material while our centralized knight (MIDDLE weak squares outpost) strikes at White'…
- chess.js.legal_moves0ms
- llm.candidates9351ms · $0.0036
full reasoning
Candidates: Kxf7 (Evicts the Nf7 intruder immediately — king safety first heuristic demands capturing the forking piece.) | Nxc3 (Wins material while our centralized knight (MIDDLE weak squares outpost) strikes at White's pawn structure.) | Ne3 (Centralised knight forks queen and rook, exploiting the outpost heuristic before recapturing on f7.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxf7 — King safety first: Nf7 forks Rh8 and attacks g8 king — must be evicted immediately. Kxf7 removes the intruder, wins the piece, and centralizes the king. White's IQP on d4 can be blockaded next with Nd5…
- llm.reflect9364ms · $0.0033
full reasoning
Final pick: Kxf7 — King safety first: Nf7 forks Rh8 and attacks g8 king — must be evicted immediately. Kxf7 removes the intruder, wins the piece, and centralizes the king. White's IQP on d4 can be blockaded next with Nd5 restored.. Rejected: d5c3, d5e3.
9. Commit Commit Kxf7 (g8f7).
19.Qf3+Haiku
1. Observe Halbzug 19, Weiss am Zug. Phase: Mittelspiel. Weiss +1 Punkte. Legale Zuege: 31. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Develop Bc1 with pressure while exploiting Black's weak kingside and exposed king on f7. Control semi-open f-file through piece coordination. Prepare kingside castling for White's safety. Leverage rook…
- llm.plan47297ms · $0.0254
full reasoning
Phase: middlegame. Develop Bc1 with pressure while exploiting Black's weak kingside and exposed king on f7. Control semi-open f-file through piece coordination. Prepare kingside castling for White's safety. Leverage rook pair + material advantage by coordinating piece attacks against Black's vulnerable king position, forcing passive defense, then convert superior coordination into winning endgame. Critical: Black's king on f7 lacks pawn shield; exposed position creates immediate tactical targets; White's Bc1 remains underdeveloped; must activate to amplify pressure on kingside; Semi-open f-file is primary avenue for rook-based attack; control forces Black to react.
6. Candidates Candidates: Qf3+ (Forcing check against exposed king; centralizes queen with tempo; controls f-file; forces passive defense; perfectly exploits plan.) | Qh5+ (Forcing check exploits weak kingside; queen attacks g6, h6 sq…
- chess.js.legal_moves0ms
- llm.candidates51343ms · $0.0282
full reasoning
Candidates: Qf3+ (Forcing check against exposed king; centralizes queen with tempo; controls f-file; forces passive defense; perfectly exploits plan.) | Qh5+ (Forcing check exploits weak kingside; queen attacks g6, h6 squares; forces Black into defensive response; maintains pressure.) | exd5 (Removes Black's centralized defender; captures material; reduces piece activity; maintains White's material advantage; solid continuation.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qf3+ — Check forces Black's exposed king to move; centralizes queen; dominates the semi-open f-file; amplifies pressure on kingside while maintaining all tactical threats.. Rejected: d1h5, e4d5.
- llm.reflect19323ms · $0.0070
9. Commit Commit Qf3+ (d1f3).
20...Nf6Sonnet
1. Observe Halbzug 20, Schwarz am Zug. Phase: Mittelspiel. Weiss +1 Punkte. Legale Zuege: 8. Schach! Criticality: 0.40.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Resolve the check from Qf3 — ideally by interposing on f6 with the Nd5 which simultaneously attacks the queen — then consolidate the king, preserve the Nd5 outpost, and begin activating the a8 rook on …
- llm.plan33236ms · $0.0206
full reasoning
Phase: middlegame. Resolve the check from Qf3 — ideally by interposing on f6 with the Nd5 which simultaneously attacks the queen — then consolidate the king, preserve the Nd5 outpost, and begin activating the a8 rook on the open a- or c-file. Leverage the Nd5 strong outpost (per weak-squares heuristic) to permanently blockade White's center pawns on d4/e4, while activating both rooks on open files to convert Black's structural pressure into a decisive endgame. Critical: White Qf3 gives check along the f-file — responding to this is mandatory and shapes every option; Nd5 sits on an ideal outpost per the MIDDLE weak-squares heuristic — any reply that preserves or reinforces it is preferred over king retreats that abandon central influence; White's d4/e4 pawn mass has no clear IQP weakness yet, but blocking the d4 advance with Nd5 denies White space gains — per the IQP heuristic the blockade square directly in front is strategically key; Black's a8 rook is dormant; open-file activation is the strategic follow-up once king safety is resolved; King on f7 remains exposed — no premature counterplay until king finds shelter or the queen trade simplifies.
6. Candidates Candidates: Nf6 (Interposes on f6 blocking the check while preserving the Nd5 outpost value; knight lands actively attacking Qf3.) | Qf6 (Blocks check with queen trade offer; simplification when down material resolves ki…
- chess.js.legal_moves0ms
- llm.candidates10895ms · $0.0039
full reasoning
Candidates: Nf6 (Interposes on f6 blocking the check while preserving the Nd5 outpost value; knight lands actively attacking Qf3.) | Qf6 (Blocks check with queen trade offer; simplification when down material resolves king safety per king-safety-first heuristic.) | Kg8 (King retreats to safety; preserves Nd5 blockade outpost on d4/e4 per IQP-blockade heuristic, though abandons f-file.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf6 — Nf6 blocks the check while attacking Qf3 directly, forcing White to spend a tempo. Preserves the strong outpost logic — knight lands actively rather than retreating passively. King safety resolved witho…
- llm.reflect9874ms · $0.0028
full reasoning
Final pick: Nf6 — Nf6 blocks the check while attacking Qf3 directly, forcing White to spend a tempo. Preserves the strong outpost logic — knight lands actively rather than retreating passively. King safety resolved without conceding central influence.. Rejected: d8f6, f7g8.
9. Commit Commit Nf6 (d5f6).
21.Qxf6+Haiku
1. Observe Halbzug 21, Weiss am Zug. Phase: Mittelspiel. Weiss +1 Punkte. Legale Zuege: 35. Criticality: 0.25.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate Bc1 to amplify f-file pressure. Coordinate Qf3 + developed pieces against exposed f7. Establish e5 outpost. Secure own king via castling, then launch coordinated kingside attack forcing passiv…
- llm.plan19262ms · $0.0070
full reasoning
Phase: middlegame. Activate Bc1 to amplify f-file pressure. Coordinate Qf3 + developed pieces against exposed f7. Establish e5 outpost. Secure own king via castling, then launch coordinated kingside attack forcing passive defense. Convert f-file pressure and piece coordination into overwhelming kingside threats that force Black into passive defense, eliminate counterplay, and transition to winning endgame. Critical: Black Nf6 must not escape via e4 to disrupt coordination; Bc1 activation is linchpin—unlocks multi-threat kingside attack; e5 outpost (knight or bishop) would paralyze Black's kingside completely.
6. Candidates Candidates: Qxf6+ (Wins knight with check, removes key f7 defender, White simply winning after forced Kg8) | Qh5+ (Develops kingside attack with tempo, threatens g7/h7, maintains overwhelming pressure) | d5 (Advances cen…
- chess.js.legal_moves0ms
- llm.candidates46383ms · $0.0252
full reasoning
Candidates: Qxf6+ (Wins knight with check, removes key f7 defender, White simply winning after forced Kg8) | Qh5+ (Develops kingside attack with tempo, threatens g7/h7, maintains overwhelming pressure) | d5 (Advances center, opens a4-e8 diagonal for Bc1, establishes e5 outpost)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qxf6+ — Wins knight with check. Forced king move leaves White simply winning with extra piece. Concrete, forcing, immediately decisive.. Rejected: f3h5, d4d5.
- llm.reflect39808ms · $0.0194
9. Commit Commit Qxf6+ (f3f6).
22...Qxf6Sonnet
1. Observe Halbzug 22, Schwarz am Zug. Phase: Mittelspiel. Weiss +4 Punkte. Legale Zuege: 5. Schach! Criticality: 0.45.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search18ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search12ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Resolve the Qf6 check immediately — either by Qd8xf6 capturing the queen to reach a simplified endgame where structural pressure matters, or by fleeing the king to e8/g8. If queens come off, activate t…
- llm.plan46750ms · $0.0323
full reasoning
Phase: middlegame. Resolve the Qf6 check immediately — either by Qd8xf6 capturing the queen to reach a simplified endgame where structural pressure matters, or by fleeing the king to e8/g8. If queens come off, activate the a8 rook on the open c-file and exploit the weak-squares outpost heuristic: White's d4/e4 pawns become targets without queens, Black's rooks gain scope on open files. Trade into a rook-and-minor-piece endgame where White's isolated center pawns on d4/e4 (IQP heuristic) become chronic weaknesses that Black's rooks on open files can besiege — converting material deficit into structural counterplay. Critical: Mandatory: resolve Qf6 check — only ~3-5 legal moves available, Qd8xf6 is the most active response and eliminates White's most dangerous piece; King safety is critically compromised on f7 — after resolving check, king must reach e8 or shelter behind kingside pawns; Open f-file and White's initiative are the dominant threats; queen trade defuses both simultaneously per open-file rooks heuristic — White cannot double rooks on f without the queen.
6. Candidates Candidates: Qxf6 (Eliminates White's most dangerous piece; per IQP heuristic, queenless endgame exposes d4/e4 as chronic targets for rooks.) | Ke8 (King flees check to safety; king-safety-first heuristic — f7 is critical…
- chess.js.legal_moves0ms
- llm.candidates9330ms · $0.0038
full reasoning
Candidates: Qxf6 (Eliminates White's most dangerous piece; per IQP heuristic, queenless endgame exposes d4/e4 as chronic targets for rooks.) | Ke8 (King flees check to safety; king-safety-first heuristic — f7 is critically exposed on open f-file.) | gxf6 (Captures queen with pawn, maintaining material and closing f-file; pawn structure weakened but check resolved.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qxf6 — Eliminates White's most dangerous attacking piece immediately. Per IQP heuristic, queenless middlegame turns d4/e4 into chronic targets for Black's rooks on open files — structural compensation for lag…
- llm.reflect7854ms · $0.0027
full reasoning
Final pick: Qxf6 — Eliminates White's most dangerous attacking piece immediately. Per IQP heuristic, queenless middlegame turns d4/e4 into chronic targets for Black's rooks on open files — structural compensation for lagging development.. Rejected: f7e8, g7f6.
9. Commit Commit Qxf6 (d8f6).
23.Bg5Haiku
1. Observe Halbzug 23, Weiss am Zug. Phase: Mittelspiel. Schwarz +5 Punkte. Legale Zuege: 26. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate Bc1 to amplify coordinated threats against Black's exposed king on f7. Secure White's king via castling. Establish e5 as dominant outpost. Force Black into passive, entirely defensive position…
- llm.plan44831ms · $0.0239
full reasoning
Phase: middlegame. Activate Bc1 to amplify coordinated threats against Black's exposed king on f7. Secure White's king via castling. Establish e5 as dominant outpost. Force Black into passive, entirely defensive position while maintaining attacking initiative to offset material deficit. Convert space advantage and Black's exposed king into overwhelming kingside attack, transforming positional domination into material recovery through forcing, multi-threat play. Critical: Black king on f7 is primary target — exposed, vulnerable to coordination; White king uncastled — must secure before Black counterplay erupts; Bc1 currently dormant — activation is linchpin for multi-threat zone; e5 outpost would paralyze Black's pieces — strategic goal; Material deficit (no Queen) forbids slow play — demands forcing attack.
6. Candidates Candidates: e5 (Establishes dominant outpost, cramps Black's pieces, forces backward retreat, secures space for forcing kingside attack.) | O-O (Secures White's king before committing to forcing attack against f7. Prereq…
- chess.js.legal_moves0ms
- llm.candidates21221ms · $0.0086
full reasoning
Candidates: e5 (Establishes dominant outpost, cramps Black's pieces, forces backward retreat, secures space for forcing kingside attack.) | O-O (Secures White's king before committing to forcing attack against f7. Prerequisite for safe multi-threat tactical play.) | Bg5 (Activates dormant Bc1, creates multi-threat coordination against Black's vulnerable f7 king. Participates in kingside attack setup.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bg5 — Activates the dormant Bc1—described as linchpin for multi-threat zone. Attacks the queen on f6 (forcing), coordinates towards f7. Establishes piece activity over pawn advance given material deficit.. Re…
- llm.reflect86433ms · $0.0462
full reasoning
Final pick: Bg5 — Activates the dormant Bc1—described as linchpin for multi-threat zone. Attacks the queen on f6 (forcing), coordinates towards f7. Establishes piece activity over pawn advance given material deficit.. Rejected: e4e5, e1g1.
9. Commit Commit Bg5 (c1g5).
24...Qxg5Sonnet
1. Observe Halbzug 24, Schwarz am Zug. Phase: Mittelspiel. Schwarz +5 Punkte. Legale Zuege: 35. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Resolve the king exposure on f7 by moving to safety (Ke8 or Kg8), then activate the a8 rook on open files. With +5 material advantage, simplify by trading pieces while keeping rooks active against Whit…
- llm.plan13895ms · $0.0056
full reasoning
Phase: middlegame. Resolve the king exposure on f7 by moving to safety (Ke8 or Kg8), then activate the a8 rook on open files. With +5 material advantage, simplify by trading pieces while keeping rooks active against White's weak IQP center on d4/e4. Convert the material advantage into a won rook endgame by exploiting the isolated d4/e4 pawns — park rooks on open c- and e-files to besiege White's pawn weaknesses while the king marches to safety. Critical: King on f7 is exposed — Bg5 bishop controls f6 square area, must resolve king safety first (memory heuristic: king safety before initiative); White's d4/e4 pawns form a classic IQP structure — once queens are off, these become chronic targets for Black's rooks on open files (IQP heuristic direct application); Open c-file and semi-open e-file available for rook activation (open file rooks heuristic — a8 rook needs a path to the game); Black's +5 material advantage means simplification favors Black — avoid complications that give White tactical compensation; White's Bg5 is active but isolated — after king safety is resolved, challenge it or trade it to remove the one active White piece.
6. Candidates Candidates: Kg8 (King safety first: removes exposed f7 king from Bg5 pressure, tucks away safely before exploiting material advantage.) | Qxg5 (Eliminates White's only active piece (Bg5), removes f6-square control threat…
- chess.js.legal_moves0ms
- llm.candidates9415ms · $0.0037
full reasoning
Candidates: Kg8 (King safety first: removes exposed f7 king from Bg5 pressure, tucks away safely before exploiting material advantage.) | Qxg5 (Eliminates White's only active piece (Bg5), removes f6-square control threat, and maintains material lead with simplification.) | Qxd4 (Directly attacks White's IQP — exploiting isolated pawn weakness heuristic — winning a center pawn while keeping queen active.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qxg5 — Eliminates White's only active piece — Bg5 controlled f6 and created king exposure on f7. After Qxg5, Black gains material AND resolves king safety simultaneously. IQP on d4/e4 becomes a chronic target…
- llm.reflect9160ms · $0.0033
full reasoning
Final pick: Qxg5 — Eliminates White's only active piece — Bg5 controlled f6 and created king exposure on f7. After Qxg5, Black gains material AND resolves king safety simultaneously. IQP on d4/e4 becomes a chronic target with no active White pieces to generate counterplay.. Rejected: f7g8, f6d4.
9. Commit Commit Qxg5 (f6g5).
25.O-OHaiku
1. Observe Halbzug 25, Weiss am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 20. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search4ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate rooks on d-file and kingside to create coordinated threats against Black's exposed king on f7. Secure White's own king via castling. Establish e5 as dominant outpost. Generate multiple forcing…
- llm.plan25732ms · $0.0118
full reasoning
Phase: middlegame. Activate rooks on d-file and kingside to create coordinated threats against Black's exposed king on f7. Secure White's own king via castling. Establish e5 as dominant outpost. Generate multiple forcing threats faster than Black can consolidate. Convert spatial advantage and Black's king vulnerability into overwhelming kingside attack that either delivers mate, wins material, or achieves dominant position despite current material deficit. Critical: Black king f7 is primary target—exposed, vulnerable to rook/bishop coordination; White king e1 uncastled—must secure before Black coordinates counterattack; e5 is strong outpost square—control it to restrict Black pieces; Black queen g5 is active but Black's rooks still on a8—rook activation lags; White can strike before Black defends.
6. Candidates Candidates: e5 (Establishes dominant e5 outpost, restricts Black's exposed f7 King (controls d6, f6), opens d-file for rook activation.) | d5 (Advances center pawn, supports kingside pressure, opens lines for coordinated…
- chess.js.legal_moves0ms
- llm.candidates46382ms · $0.0241
full reasoning
Candidates: e5 (Establishes dominant e5 outpost, restricts Black's exposed f7 King (controls d6, f6), opens d-file for rook activation.) | d5 (Advances center pawn, supports kingside pressure, opens lines for coordinated piece play against Black's uncoordinated position.) | O-O (Secures uncastled King, connects rooks, activates h-rook for kingside attack before Black consolidates defenses.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: O-O — Secures uncastled King, connects rooks for coordinated attack. Prevents Black Queen checks (Qe3+, Qd2+), then e5 follows with safe King and overwhelming force.. Rejected: e4e5, d4d5.
- llm.reflect21856ms · $0.0071
9. Commit Commit O-O (e1g1).
26...Ke8Sonnet
1. Observe Halbzug 26, Schwarz am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 40. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search11ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Resolve king exposure on f7 immediately (Ke8 or Kg8), then activate the a8 rook on the c- or e-file to pressure White's isolated d4/e4 pawns. Queen on g5 already dominant — use material advantage to si…
- llm.plan12037ms · $0.0051
full reasoning
Phase: middlegame. Resolve king exposure on f7 immediately (Ke8 or Kg8), then activate the a8 rook on the c- or e-file to pressure White's isolated d4/e4 pawns. Queen on g5 already dominant — use material advantage to simplify into a winning rook endgame. Convert +8 material advantage by trading pieces favorably while rooks besiege White's weak IQP center on d4/e4, marching king to safety and eventually a won rook endgame. Critical: King on f7 is exposed — must move to e8 or g8 before any active play (memory: king safety before initiative); White's isolated d4/e4 pawns are long-term targets — memory heuristic IQP: blockade square d5/e5 is strong for Black; Black queen on g5 is active but king safety takes priority over queen aggression; a8 rook is completely idle — once king is safe, open the c-file or e-file per memory heuristic open-file rooks; No immediate tactical threats from White with king on g1 and rooks passive.
6. Candidates Candidates: Ke8 (King safety first — removes exposure on f7, tucks king to back rank before any active play per memory heuristic.) | d5 (Blockades White's IQP on d4, claims strong central square per memory heuristic: blo…
- chess.js.legal_moves0ms
- llm.candidates8994ms · $0.0037
full reasoning
Candidates: Ke8 (King safety first — removes exposure on f7, tucks king to back rank before any active play per memory heuristic.) | d5 (Blockades White's IQP on d4, claims strong central square per memory heuristic: blockade d5/e5 against isolated pawns.) | Qe5 (Queen centralizes on e5, pressuring both d4 and e4 pawns simultaneously while keeping king-side options open.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke8 — King safety before initiative — f7 is exposed to any future rook lift or tactical shot. Ke8 tucks king to safety per memory heuristic #1, after which the a8 rook activates and +8 material converts clean…
- llm.reflect8891ms · $0.0028
full reasoning
Final pick: Ke8 — King safety before initiative — f7 is exposed to any future rook lift or tactical shot. Ke8 tucks king to safety per memory heuristic #1, after which the a8 rook activates and +8 material converts cleanly.. Rejected: d7d5, g5e5.
9. Commit Commit Ke8 (f7e8).
27.Rfe1Haiku
1. Observe Halbzug 27, Weiss am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 20. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Open center and e-file to create coordinated rook threats against Black's exposed king. Force the active queen to commit or retreat. Activate rooks on key files faster than Black can consolidate. Explo…
- llm.plan79980ms · $0.0439
full reasoning
Phase: middlegame. Open center and e-file to create coordinated rook threats against Black's exposed king. Force the active queen to commit or retreat. Activate rooks on key files faster than Black can consolidate. Exploit uncastled king in center by opening lines and coordinating rook pressure. Convert spatial advantage and tempo into material gain or dominant rook positioning. Critical: Opponent's queen active on g5—force it away; Own rooks must activate on open/half-open lines; Black king uncastled and exposed to rook infiltration; White down material—must generate threats quickly.
6. Candidates Candidates: d5 (Opens center, forces piece disruption, creates tactical breakthrough lines toward Black's uncastled king.) | Rae1 (Activates rook on critical e-file targeting exposed king. Creates immediate coordination …
- chess.js.legal_moves0ms
- llm.candidates25740ms · $0.0138
full reasoning
Candidates: d5 (Opens center, forces piece disruption, creates tactical breakthrough lines toward Black's uncastled king.) | Rae1 (Activates rook on critical e-file targeting exposed king. Creates immediate coordination threat with second rook.) | Rfe1 (Doubles rooks on e-file, intensifies king pressure. Implements coordinated rook threats to exploit uncastled position.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rfe1 — f1-e1 activates the more active rook onto the critical e-file, threatening e8 and setting up Rae1 for doubled-rook assault. Cohesive, forcing, and builds mating threats faster.. Rejected: d4d5, a1e1.
- llm.reflect55808ms · $0.0317
9. Commit Commit Rfe1 (f1e1).
28...Kf8Sonnet
1. Observe Halbzug 28, Schwarz am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 37. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search10ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Resolve king exposure immediately (Ke8 or Kg8), then station rooks on open d- and e-files to besiege White's isolated d4/e4 pawns. Queen on g5 remains dominant. Convert +8 material into a technical win…
- llm.plan11573ms · $0.0044
full reasoning
Phase: middlegame. Resolve king exposure immediately (Ke8 or Kg8), then station rooks on open d- and e-files to besiege White's isolated d4/e4 pawns. Queen on g5 remains dominant. Convert +8 material into a technical winning rook endgame. Trade into a won rook endgame by exploiting White's IQP on d4/e4 — memory heuristic MIDDLE isolated pawn IQP confirms d4 is a permanent weakness — while rooks colonize open files per MIDDLE open file rooks principle. Critical: King on e8 is exposed — must reach g8 or e8 safety before active play (king safety before initiative, previous plan confirmed); White's d4/e4 isolated pawns are permanent targets once rooks reach d8/e8 open files; Queen on g5 is highly active but no immediate mating threat — maintain domination without overextending; White has Rook pair and Re1 pressure — neutralize before simplifying.
6. Candidates Candidates: Kf8 (King safety before initiative: resolves Ke8 exposure immediately, reaching safe f8 square before active play.) | d5 (Attacks White's IQP on e4/d4 directly; open files principle — d-file opens for rook co…
- chess.js.legal_moves0ms
- llm.candidates8873ms · $0.0036
full reasoning
Candidates: Kf8 (King safety before initiative: resolves Ke8 exposure immediately, reaching safe f8 square before active play.) | d5 (Attacks White's IQP on e4/d4 directly; open files principle — d-file opens for rook colonization after trade.) | Qe5 (Queen centralizes to e5, pressuring both d4 and e4 isolated pawns simultaneously while maintaining domination.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kf8 — King safety before initiative: Ke8 is exposed on the open e-file with White's Re1 aiming directly at it. Kf8 resolves the exposure immediately. Only then can rooks colonize d8/e8 per open file principle…
- llm.reflect9357ms · $0.0030
full reasoning
Final pick: Kf8 — King safety before initiative: Ke8 is exposed on the open e-file with White's Re1 aiming directly at it. Kf8 resolves the exposure immediately. Only then can rooks colonize d8/e8 per open file principle.. Rejected: d7d5, g5e5.
9. Commit Commit Kf8 (e8f8).
29.Re3Haiku
1. Observe Halbzug 29, Weiss am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 22. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Force the exposed king to move via e-file penetration, then coordinate rooks to attack from multiple angles before Black can consolidate defenses. Exploit the uncastled, centralized king and Black's un…
- llm.plan33256ms · $0.0158
full reasoning
Phase: middlegame. Force the exposed king to move via e-file penetration, then coordinate rooks to attack from multiple angles before Black can consolidate defenses. Exploit the uncastled, centralized king and Black's underdeveloped pieces by converting rook activity and spatial advantage into a dominant attack or material gain. Critical: Black's king fatally exposed on f8 without shelter; White's e-file is half-open—ready for rook infiltration with tempo; Material deficit—must attack relentlessly or face slow defeat; Black's pieces stuck on back rank—unable to defend king quickly.
6. Candidates Candidates: d5 (Advance pawn toward Black's position, create central threat and restrict king escape squares) | e5 (Expand central space, restrict Black pieces, open lines for rook infiltration on e-file) | Re3 (Advance …
- chess.js.legal_moves0ms
- llm.candidates51723ms · $0.0298
full reasoning
Candidates: d5 (Advance pawn toward Black's position, create central threat and restrict king escape squares) | e5 (Expand central space, restrict Black pieces, open lines for rook infiltration on e-file) | Re3 (Advance rook on e-file to establish presence and prepare direct assault on exposed f8 king)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Re3 — Re3 threatens Re8# against Black's exposed f8 king. Forces immediate response; only forcing move leveraging the half-open e-file with tempo.. Rejected: d4d5, e4e5.
- llm.reflect18825ms · $0.0073
9. Commit Commit Re3 (e1e3).
30...Qxe3Sonnet
1. Observe Halbzug 30, Schwarz am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 35. Criticality: 0.20.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search14ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Resolve Black king exposure by castling or king flight to g8/f7, then centralize rooks on d8/e8 to attack White's isolated d4/e4 pawns. Queen on g5 maintains dominance. Convert +8 material advantage in…
- llm.plan10435ms · $0.0040
full reasoning
Phase: middlegame. Resolve Black king exposure by castling or king flight to g8/f7, then centralize rooks on d8/e8 to attack White's isolated d4/e4 pawns. Queen on g5 maintains dominance. Convert +8 material advantage into a clean rook endgame. Exploit White's permanent IQP on d4 (memory: MIDDLE isolated pawn IQP) by blockading d5 with a rook and pressuring via open files (memory: MIDDLE open file rooks), trading into a technically won endgame. Critical: Black king on f8 is exposed — king safety before any active play (previous plan confirmed); White Re3 is active and could swing to attack; neutralize before it becomes threatening; d4/e4 pawn duo is White's only trump — blockade and siege them before they advance.
6. Candidates Candidates: Qxe3 (Removes active Re3 threat, gains material, exploits open file control; IQP on d4 now defenseless.) | Kg8 (King safety first: escapes f8 exposure before active play, per plan's critical priority.) | d5 (…
- chess.js.legal_moves0ms
- llm.candidates12409ms · $0.0035
full reasoning
Candidates: Qxe3 (Removes active Re3 threat, gains material, exploits open file control; IQP on d4 now defenseless.) | Kg8 (King safety first: escapes f8 exposure before active play, per plan's critical priority.) | d5 (Blockades d4 IQP immediately, creates open files for rooks; siege strategy on isolated pawns.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qxe3 — Re3 is White's only active piece; removing it eliminates the kingside attack threat while gaining material. With Re3 gone, d4 IQP is defenseless and Black's +8 advantage converts cleanly.. Rejected: f8…
- llm.reflect8362ms · $0.0029
full reasoning
Final pick: Qxe3 — Re3 is White's only active piece; removing it eliminates the kingside attack threat while gaining material. With Re3 gone, d4 IQP is defenseless and Black's +8 advantage converts cleanly.. Rejected: f8g8, d7d5.
9. Commit Commit Qxe3 (g5e3).
31.fxe3Haiku
1. Observe Halbzug 31, Weiss am Zug. Phase: Mittelspiel. Schwarz +13 Punkte. Legale Zuege: 17. Criticality: 0.10. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate the rook on the e-file to pressure Black's uncastled king and the dominant queen. Push e5 or d5 to open lines and create back-rank threats. White is down ~13 points; only tactic and perpetual-…
- llm.plan29240ms · $0.0138
full reasoning
Phase: middlegame. Activate the rook on the e-file to pressure Black's uncastled king and the dominant queen. Push e5 or d5 to open lines and create back-rank threats. White is down ~13 points; only tactic and perpetual-check chances remain. Force rook onto e-file (Re1, controlling the half-open file), advance central pawns (e5/d5) to open lines to Black's king on f8, and create mating/perpetual-check chances before the material deficit becomes completely decisive. Critical: opponent threat: Qe1+ is a devastating back-rank check; Black's queen dominates the board and controls multiple squares; own weakness: catastrophic material deficit (Black has Q+R+N+B vs White's lone R, approximately -13 points); rook on a1 is passive and out of play; concrete tactical threat: e-file is half-open and ready for rook penetration; if Re1 forces the queen away and e5 follows, White gains attacking chances against f8; d4–d5 advance also opens central lines.
6. Candidates Candidates: fxe3 (Capture Black's dominant queen. Wins 9 points material immediately, eliminates Black's most dangerous attacking piece and key controller.) | d5 (Advance central pawn, open d-file toward uncastled king f…
- chess.js.legal_moves0ms
- llm.candidates33303ms · $0.0181
full reasoning
Candidates: fxe3 (Capture Black's dominant queen. Wins 9 points material immediately, eliminates Black's most dangerous attacking piece and key controller.) | d5 (Advance central pawn, open d-file toward uncastled king f8. Creates space for rook activity and forces Black structural decisions.) | e5 (Advance e-pawn to open e-file fully. Supports Re1 rook penetration and creates central pressure against king on f8.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: fxe3 — Queen on e3 hangs undefended; captures wins 9-point material, eliminates Qe1+ back-rank threat, reduces deficit from −13 to −4.. Rejected: d4d5, e4e5.
- llm.reflect59281ms · $0.0334
9. Commit Commit fxe3 (f2e3).
32...Kg8Sonnet
1. Observe Halbzug 32, Schwarz am Zug. Phase: Mittelspiel. Schwarz +4 Punkte. Legale Zuege: 18. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search21ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search13ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Secure Black king (f8 exposed — king safety before all else), then activate rooks on open d/e files to blockade and attack White's IQP on d4. Convert +4 material into a clean technical endgame by tradi…
- llm.plan15365ms · $0.0054
full reasoning
Phase: middlegame. Secure Black king (f8 exposed — king safety before all else), then activate rooks on open d/e files to blockade and attack White's IQP on d4. Convert +4 material into a clean technical endgame by trading into a rook ending where White's isolated pawns are permanent liabilities. Exploit White's IQP on d4 (memory: MIDDLE isolated pawn IQP) by planting a rook on d5 or e5 as a blockader/outpost (memory: MIDDLE weak squares outpost), then use the open d-file and Black's material advantage to grind White's pawn structure into a lost rook endgame. Critical: Black king on f8 is still exposed — resolve before any active plan; king to g8 or e7 is first priority; White's d4/e4 pawn duo looks dangerous but d4 is isolated long-term — do not allow White to advance e5 and gain space; Open d-file and e-file are Black's highway — rooks must reach d8/e8 to dominate these lines (memory: MIDDLE open file rooks); White has no pieces left — conversion is technical but king safety failure could allow perpetual rook harassment.
6. Candidates Candidates: Kg8 (King safety first — f8 is exposed; Kg8 tucks king away before any active plan begins.) | d5 (Strikes White's IQP pawn duo, opens d-file for rooks, and contests e4 advance — exploiting weak squares outpos…
- chess.js.legal_moves0ms
- llm.candidates9520ms · $0.0037
full reasoning
Candidates: Kg8 (King safety first — f8 is exposed; Kg8 tucks king away before any active plan begins.) | d5 (Strikes White's IQP pawn duo, opens d-file for rooks, and contests e4 advance — exploiting weak squares outpost principle.) | Nc6 (Develops last piece, pressures d4 IQP, prepares rooks to dominate open d/e files via active piece coordination.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kg8 — King safety first — f8 is exposed to rook harassment on the d/e files. Memory: king safety before any active plan. Kg8 resolves the weakness before exploiting White's IQP on d4.. Rejected: d7d5, b8c6.
- llm.reflect8861ms · $0.0027
9. Commit Commit Kg8 (f8g8).
33.d5Haiku
1. Observe Halbzug 33, Weiss am Zug. Phase: Mittelspiel. Schwarz +4 Punkte. Legale Zuege: 17. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Push d5 to create a forcing passed pawn that demands Nd7 blockade. Activate the rook (Re1 next) to support the center. Threaten e5 to open lines. Convert material deficit into passed-pawn and promotion…
- llm.plan66407ms · $0.0365
full reasoning
Phase: middlegame. Push d5 to create a forcing passed pawn that demands Nd7 blockade. Activate the rook (Re1 next) to support the center. Threaten e5 to open lines. Convert material deficit into passed-pawn and promotion threats. Drive central pawns toward promotion (d5-d6-d7-d8=Q or e5-e6-e7) while rook creates mating threats, forcing Black's pieces into defensive blockade roles until a tactical breakthrough emerges. Critical: Black's extra piece (N+B) wins if White plays passively; d5 now is mandatory forcing move; Knight will be locked into Nd7 blockade, immobilizing Black's only active piece; Rook must activate immediately (Re1 or Ra4) to support pawns and threaten back-rank tactics against castled king.
6. Candidates Candidates: d5 (Forces Nd7 blockade, advances passed pawn to fifth rank, locks Black's knight.) | Re1 (Rook activation, supports d/e pawns, creates back-rank threats vs. castled king.) | e5 (Dual passed-pawn threats, inc…
- chess.js.legal_moves0ms
- llm.candidates22240ms · $0.0100
full reasoning
Candidates: d5 (Forces Nd7 blockade, advances passed pawn to fifth rank, locks Black's knight.) | Re1 (Rook activation, supports d/e pawns, creates back-rank threats vs. castled king.) | e5 (Dual passed-pawn threats, increases promotion pressure, forces Black's defensive response.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d5 — Forces Nd7 blockade immediately, locking Black's knight out of play. Advances passed pawn, creating unstoppable promotion threat while immobilizing Black's most active piece.. Rejected: a1e1, e4e5.
- llm.reflect21881ms · $0.0089
9. Commit Commit d5 (d4d5).
34...Nc6Sonnet
1. Observe Halbzug 34, Schwarz am Zug. Phase: Mittelspiel. Schwarz +4 Punkte. Legale Zuege: 16. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search18ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. King is already on g8 (safer than f8). Now activate both rooks on open d/e files, plant a rook on d5 to blockade White's IQP on d5, and convert +4 material advantage into a technically won rook endgame…
- llm.plan10861ms · $0.0040
full reasoning
Phase: middlegame. King is already on g8 (safer than f8). Now activate both rooks on open d/e files, plant a rook on d5 to blockade White's IQP on d5, and convert +4 material advantage into a technically won rook endgame by trading down. Use open file rooks (memory: MIDDLE open file rooks) on the d/e files to blockade White's isolated d5-pawn (memory: MIDDLE isolated pawn IQP), then grind White's weak pawn structure into a lost endgame with Black's material surplus. Critical: White's passed d5 pawn is dangerous if it advances — must blockade immediately; Black king on g8 is relatively safe — no immediate threats; White's pawn structure (c3/e3/e4/c3) is weak but d5 is a potential passer — rook on d8 blockade is priority.
6. Candidates Candidates: Nc6 (Attacks d5 IQP directly; blockades the passer per isolated-pawn heuristic while developing piece.) | d6 (Blockades White's d5 passer immediately; open-file rooks principle — locks structure before activa…
- chess.js.legal_moves0ms
- llm.candidates8837ms · $0.0035
full reasoning
Candidates: Nc6 (Attacks d5 IQP directly; blockades the passer per isolated-pawn heuristic while developing piece.) | d6 (Blockades White's d5 passer immediately; open-file rooks principle — locks structure before activating.) | c6 (Challenges d5 pawn, forces trade or retreat; converts IQP weakness into open file for Black rooks.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nc6 — Nc6 attacks d5 directly while developing a piece, applying isolated-pawn blockade principle without conceding space. Knight on c6 is more active than a pawn blockade and keeps rooks free to occupy open …
- llm.reflect11072ms · $0.0026
full reasoning
Final pick: Nc6 — Nc6 attacks d5 directly while developing a piece, applying isolated-pawn blockade principle without conceding space. Knight on c6 is more active than a pawn blockade and keeps rooks free to occupy open files.. Rejected: d7d6, c7c6.
9. Commit Commit Nc6 (b8c6).
35.d6Haiku
1. Observe Halbzug 35, Weiss am Zug. Phase: Mittelspiel. Schwarz +4 Punkte. Legale Zuege: 18. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Force Black's Knight to d7 blockade via d6 push. Activate Rook on the e- or 6th rank to support passed pawns. Convert d-pawn pressure into promotion threats before Black's extra pieces (B+N) coordinate…
- llm.plan46899ms · $0.0222
full reasoning
Phase: middlegame. Force Black's Knight to d7 blockade via d6 push. Activate Rook on the e- or 6th rank to support passed pawns. Convert d-pawn pressure into promotion threats before Black's extra pieces (B+N) coordinate a counterattack. Drive the d5 pawn to d6–d7, forcing Black's Knight into permanent blockade. Rook controls the center and creates mating threats. Convert passed-pawn domination into either promotion or winning attack despite material deficit. Critical: Black is up 6 points (R+B+N vs R)—White has no time for passive play. Forcing moves (d6, e5, Re1) are mandatory to seize initiative.; d5 pawn is White's only real compensation. If it is stopped, Black's extra pieces consolidate and win.; Black's Bishop on c8 and Knight on c6 are undeveloped. Rook activation (Re1, Ra6) must happen NOW while Black is still coordinating pieces.; After d6, Black's Knight is likely locked on d7. Then Re1–Re7 or Ra6–a7 creates unstoppable threats on the 7th rank..
6. Candidates Candidates: d6 (Directly forces knight blockade on d7, locks Black's pieces. Core forcing move per plan.) | Re1 (Activates rook on e-file to support d-pawn, threatens Re7 invasion. Rook coordination critical.) | e5 (Crea…
- chess.js.legal_moves0ms
- llm.candidates31362ms · $0.0131
full reasoning
Candidates: d6 (Directly forces knight blockade on d7, locks Black's pieces. Core forcing move per plan.) | Re1 (Activates rook on e-file to support d-pawn, threatens Re7 invasion. Rook coordination critical.) | e5 (Creates second passed pawn threat, forces Black piece activity. Dual pawn pressure splits defense.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d6 — Forces Nd7 blockade immediately, locking Black's most active piece. Advances White's only real compensation (d-pawn). Most forcing move per plan; no time for passive play when down material.. Rejected: a…
- llm.reflect16726ms · $0.0053
full reasoning
Final pick: d6 — Forces Nd7 blockade immediately, locking Black's most active piece. Advances White's only real compensation (d-pawn). Most forcing move per plan; no time for passive play when down material.. Rejected: a1e1, e4e5.
9. Commit Commit d6 (d5d6).
36...cxd6Sonnet
1. Observe Halbzug 36, Schwarz am Zug. Phase: Mittelspiel. Schwarz +4 Punkte. Legale Zuege: 20. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Blockade White's d6-pawn immediately with Nc6-d4 or rook on d8, then activate both rooks on d/e files to convert +4 material surplus into a won ending by trading pieces Use the knight outpost on d4/e5 …
- llm.plan15382ms · $0.0040
full reasoning
Phase: middlegame. Blockade White's d6-pawn immediately with Nc6-d4 or rook on d8, then activate both rooks on d/e files to convert +4 material surplus into a won ending by trading pieces Use the knight outpost on d4/e5 (memory: MIDDLE weak squares outpost) and rook pressure on open d-file (memory: MIDDLE open file rooks) to neutralize White's dangerous d6-passer, then liquidate into a technically won rook endgame leveraging the material advantage Critical: White's d6 pawn is a passed pawn one step from queening — must be blockaded this move or next; Black's Nc6 is the ideal blockader on d4 or can rook land on d8 to stop d7; Black king on g8 is relatively safe but d6-d7 push could become unstoppable if not addressed immediately.
6. Candidates Candidates: cxd6 (Eliminates the dangerous passed d6-pawn immediately; rook open file pressure follows on d-file with material surplus.) | Nd4 (Occupies the outpost weak square d4; blockades d-file advance and activates …
- chess.js.legal_moves0ms
- llm.candidates8979ms · $0.0036
full reasoning
Candidates: cxd6 (Eliminates the dangerous passed d6-pawn immediately; rook open file pressure follows on d-file with material surplus.) | Nd4 (Occupies the outpost weak square d4; blockades d-file advance and activates knight centrally.) | Ne5 (Centralized knight on e5 outpost dominates; indirectly covers d7 square and maintains open file rook pressure potential.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: cxd6 — Eliminates the passed d6-pawn immediately — the open d-file rooks heuristic demands we open the d-file for our rooks while erasing White's most dangerous asset. Material surplus (+4) converts cleanly o…
- llm.reflect9952ms · $0.0029
full reasoning
Final pick: cxd6 — Eliminates the passed d6-pawn immediately — the open d-file rooks heuristic demands we open the d-file for our rooks while erasing White's most dangerous asset. Material surplus (+4) converts cleanly once the passer is gone.. Rejected: c6d4, c6e5.
9. Commit Commit cxd6 (c7d6).
37.e5Haiku
1. Observe Halbzug 37, Weiss am Zug. Phase: Mittelspiel. Schwarz +5 Punkte. Legale Zuege: 16. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search13ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate Rook on e-file to support passed e-pawn; coordinate forcing pawn advance with piece pressure to tie down Black's Nc6 into permanent blockade role Drive e-pawn toward promotion while Rook contr…
- llm.plan47436ms · $0.0248
full reasoning
Phase: middlegame. Activate Rook on e-file to support passed e-pawn; coordinate forcing pawn advance with piece pressure to tie down Black's Nc6 into permanent blockade role Drive e-pawn toward promotion while Rook controls the half-open e-file. Convert tempo advantage and passed-pawn threats into either promotion or mating net, offsetting material deficit (Black +R+B+N) Critical: e4 pawn is White's only tangible asset; must advance without hesitation; Black's Nc6 is sole defender of critical squares; if constrained, Black loses piece coordination; White is down ~7 points and has zero margin for slow maneuvering—forcing moves are mandatory to seize initiative before Black consolidates.
6. Candidates Candidates: e5 (Forces pawn advance. White's only tangible asset—must push without hesitation. Ties Nc6 deeper into blockade.) | Re1 (Activates Rook on e-file. Supports passed pawn, controls critical square, coordinates …
- chess.js.legal_moves0ms
- llm.candidates17215ms · $0.0080
full reasoning
Candidates: e5 (Forces pawn advance. White's only tangible asset—must push without hesitation. Ties Nc6 deeper into blockade.) | Re1 (Activates Rook on e-file. Supports passed pawn, controls critical square, coordinates with e5 push.) | c4 (Secondary pawn advance expands White's footprint. Less urgent than e5/Re1 but supports space control and tempo.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e5 — Passed pawn advances immediately without hesitation. White's sole asset must force promotion threat now. Ties Nc6 deeper, creating unstoppable tempo before Black consolidates.. Rejected: a1e1, c3c4.
- llm.reflect30260ms · $0.0141
9. Commit Commit e5 (e4e5).
38...Nxe5Sonnet
1. Observe Halbzug 38, Schwarz am Zug. Phase: Mittelspiel. Schwarz +5 Punkte. Legale Zuege: 21. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate rooks on open d/e files while keeping knight centralized, convert +5 material surplus into a technically won endgame by trading pieces and advancing queenside pawns Leverage the massive materi…
- llm.plan10378ms · $0.0031
full reasoning
Phase: middlegame. Activate rooks on open d/e files while keeping knight centralized, convert +5 material surplus into a technically won endgame by trading pieces and advancing queenside pawns Leverage the massive material advantage by centralizing rooks on open files (MIDDLE open file rooks) and using the knight on an outpost (MIDDLE weak squares outpost) to neutralize any White counterplay before liquidating into a won endgame. Critical: White has no passed pawn threat in this position — e5 pawn is blockaded by Black's structure; Black must activate the a8-rook via open files; King safety is adequate with king on g8; Convert material advantage without allowing stalemate tricks.
6. Candidates Candidates: Nxe5 (Captures the e5 pawn, centralizing knight on strong outpost (MIDDLE weak squares outpost) while winning material.) | dxe5 (Recaptures on e5 opening the d-file for rook activation (MIDDLE open file rooks…
- chess.js.legal_moves0ms
- llm.candidates8884ms · $0.0036
full reasoning
Candidates: Nxe5 (Captures the e5 pawn, centralizing knight on strong outpost (MIDDLE weak squares outpost) while winning material.) | dxe5 (Recaptures on e5 opening the d-file for rook activation (MIDDLE open file rooks), converting material surplus.) | Nd4 (Knight to dominant central outpost d4, maximizing piece activity before rook activation on open files.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxe5 — Captures a pawn immediately, placing knight on strong central outpost e5 (MIDDLE weak squares outpost). Material surplus grows while the knight on e5 dominates; rook activation via d-file follows natur…
- llm.reflect8872ms · $0.0029
full reasoning
Final pick: Nxe5 — Captures a pawn immediately, placing knight on strong central outpost e5 (MIDDLE weak squares outpost). Material surplus grows while the knight on e5 dominates; rook activation via d-file follows naturally.. Rejected: d6e5, c6d4.
9. Commit Commit Nxe5 (c6e5).
39.e4Haiku
1. Observe Halbzug 39, Weiss am Zug. Phase: Mittelspiel. Schwarz +6 Punkte. Legale Zuege: 16. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search10ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate Rook to e-file to support passed e-pawn; drive e3→e4→e5 to force Black's Ne5 into permanent blockade role or capture. Push passed e-pawn toward promotion, offsetting Black's material advantage…
- llm.plan62603ms · $0.0331
full reasoning
Phase: middlegame. Activate Rook to e-file to support passed e-pawn; drive e3→e4→e5 to force Black's Ne5 into permanent blockade role or capture. Push passed e-pawn toward promotion, offsetting Black's material advantage (+6 points) through forcing threats and Rook coordination. Critical: Ne5 guards e4/e5; if constrained or traded, e-pawn runs free to e6; Ra1 is passive; must activate on e-file immediately; e-pawn is White's only tangible asset; must advance without hesitation.
6. Candidates Candidates: e4 (Advances the sole passed pawn toward promotion; forces Black's Ne5 to blockade or face e5 push) | Re1 (Activates Rook on e-file; supports e-pawn advance and prepares to push Ne5 into permanent passive rol…
- chess.js.legal_moves0ms
- llm.candidates21250ms · $0.0100
full reasoning
Candidates: e4 (Advances the sole passed pawn toward promotion; forces Black's Ne5 to blockade or face e5 push) | Re1 (Activates Rook on e-file; supports e-pawn advance and prepares to push Ne5 into permanent passive role) | c4 (Creates secondary pawn threat; if Black focuses on stopping e-pawn, c4 advances unopposed)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e4 — e4 forces immediate Knight decision. Threatens e5xNe5 if Ne5 stays; if Knight flees, e-pawn runs to e5 unopposed. Tactic over setup.. Rejected: a1e1, c3c4.
- llm.reflect66282ms · $0.0350
9. Commit Commit e4 (e3e4).
40...d5Sonnet
1. Observe Halbzug 40, Schwarz am Zug. Phase: Mittelspiel. Schwarz +6 Punkte. Legale Zuege: 20. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search13ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Convert +6 material advantage by activating the a8-rook on open files, keeping the knight on its central outpost e5 (MIDDLE weak squares outpost), and trading down into a technically won endgame Use th…
- llm.plan9835ms · $0.0029
full reasoning
Phase: middlegame. Convert +6 material advantage by activating the a8-rook on open files, keeping the knight on its central outpost e5 (MIDDLE weak squares outpost), and trading down into a technically won endgame Use the rook on open d/e files (MIDDLE open file rooks) to force further simplification, then advance queenside pawns in a won endgame Critical: White has no counterplay — single rook on a1, no passed pawns; Black knight on e5 is dominant and must not be traded unless clearly profitable; Black king on g8 is safe; no immediate threats to address.
6. Candidates Candidates: Rb8 (Activates rook on open b-file per MIDDLE open file rooks heuristic; pressures b2 and creates threats on queenside.) | d5 (Challenges white's e4 pawn, opens d-file for rook activation per open file rooks …
- chess.js.legal_moves0ms
- llm.candidates9580ms · $0.0037
full reasoning
Candidates: Rb8 (Activates rook on open b-file per MIDDLE open file rooks heuristic; pressures b2 and creates threats on queenside.) | d5 (Challenges white's e4 pawn, opens d-file for rook activation per open file rooks principle, gains space.) | Nf3+ (Knight fork with check disrupts white king, but trades dominant e5 outpost — acceptable only if winning material.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d5 — Strikes e4 immediately, opening the d-file for the a8-rook per open file rooks heuristic. If exd5, Rxd5-like pressure builds; if e5 advances, Black gains space. Keeps knight on dominant e5 outpost.. Reje…
- llm.reflect9416ms · $0.0030
full reasoning
Final pick: d5 — Strikes e4 immediately, opening the d-file for the a8-rook per open file rooks heuristic. If exd5, Rxd5-like pressure builds; if e5 advances, Black gains space. Keeps knight on dominant e5 outpost.. Rejected: a8b8, e5f3.
9. Commit Commit d5 (d6d5).
41.exd5Haiku
1. Observe Halbzug 41, Weiss am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 16. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search4ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Force e5, driving Ne5 into discomfort and paving e6 in 2-3 moves. Activate Ra1 to e1 once Knight displaced. Block Black's extra pieces (B+N) into defensive roles around the advancing pawn. Push passed e-p…
- llm.plan42235ms · $0.0187
full reasoning
Phase: endgame. Force e5, driving Ne5 into discomfort and paving e6 in 2-3 moves. Activate Ra1 to e1 once Knight displaced. Block Black's extra pieces (B+N) into defensive roles around the advancing pawn. Push passed e-pawn to e6+ as quickly as possible. Tie down Black's pieces to blockade/defense. Race against Black's +6 material (B+N) by creating unstoppable promotion threats. White's only asset is this pawn; every move must accelerate its advance or clear its path. Critical: Ne5 blocks e4/e5 and must be displaced or drawn into suboptimal squares; Ra1 is passive and must move to e1 to support pawn advance (Rook on 3rd rank holding is Philidor defense; once pawn is on e6, Philidor breaks and pawn runs); Nf3+ will likely come as a forcing check after e5; King moves (Kf2 best) and then Re1 follows—pawn has already advanced despite the check; Black's Rook and Bishop are active but geographically far from the e-pawn; this is White's tempo advantage; No fortress possible unless e-pawn reaches e7; before that, material deficit is lethal.
6. Candidates Candidates: exd5 (Advance e-pawn to e5, eliminate d-pawn, force Ne5 into uncomfortable position. Core tactic.) | Re1 (Activate passive Rook, position to support e6 push next. Critical for pawn promotion race.) | c4 (Seco…
- chess.js.legal_moves0ms
- llm.candidates21857ms · $0.0105
full reasoning
Candidates: exd5 (Advance e-pawn to e5, eliminate d-pawn, force Ne5 into uncomfortable position. Core tactic.) | Re1 (Activate passive Rook, position to support e6 push next. Critical for pawn promotion race.) | c4 (Secondary pawn advance creates threats, ties Black pieces to defense. Supports e-pawn strategy.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: exd5 — Capture d-pawn, advance e-pawn to d5, create concrete promotion threat forcing Ne5 into discomfort. Pawn now races to d6-d7-d8=Q unstoppable.. Rejected: a1e1, c3c4.
- llm.reflect43456ms · $0.0224
9. Commit Commit exd5 (e4d5).
42...Nf3+Sonnet
1. Observe Halbzug 42, Schwarz am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 20. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search4ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate the a8-rook to the open d-file or e-file, press the passed d5-pawn advantage, and march the king toward the center to support a decisive pawn or piece breakthrough in the next 3-5 moves. Convert …
- llm.plan13394ms · $0.0048
full reasoning
Phase: endgame. Activate the a8-rook to the open d-file or e-file, press the passed d5-pawn advantage, and march the king toward the center to support a decisive pawn or piece breakthrough in the next 3-5 moves. Convert the +5 material lead by centralizing the king (opposition principles apply — memory hit ENDGAME opposition), coordinating rook and knight to create a passed pawn on the queenside or promote the central pressure into a won king-and-rook ending. Critical: White d5-pawn is advanced but isolated — Black must neutralize or blockade it before it becomes dangerous; Knight on e5 remains dominant outpost — do not trade unless forced; Memory hit ENDGAME opposition: king centralization is now the priority — Kg8-f7-e6 is the natural path toward the center; Memory hit ENDGAME lucena: if rooks trade down, Lucena/Philidor knowledge guides the technical win; White has no counterplay — a1-rook is passive, king on g1 is distant — no immediate threats to calculate.
6. Candidates Candidates: Kf7 (King centralization toward e6 — memory hit ENDGAME opposition. King marches Kf7-e6 to support rook and neutralize d5-pawn.) | Nf3+ (Knight fork check drives White king away from g1, gaining tempo and dis…
- chess.js.legal_moves0ms
- llm.candidates10378ms · $0.0040
full reasoning
Candidates: Kf7 (King centralization toward e6 — memory hit ENDGAME opposition. King marches Kf7-e6 to support rook and neutralize d5-pawn.) | Nf3+ (Knight fork check drives White king away from g1, gaining tempo and disrupting any rook coordination while maintaining dominant knight.) | Rb8 (Activates rook to open b-file, pressuring b2/b-pawn area and preparing rook transfer to d8 to blockade the dangerous d5-pawn.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf3+ — Check forces Kh1 or Kf1, disrupting any rook activation. After king moves, Nd2 forks c-pawn and a1-rook, winning material and collapsing White's last counterplay.. Rejected: g8f7, a8b8.
- llm.reflect9405ms · $0.0027
9. Commit Commit Nf3+ (e5f3).
43.gxf3Haiku
1. Observe Halbzug 43, Weiss am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 4. Schach! Criticality: 0.55.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. d6 immediately, force Rd8 blockade. Activate Ra1→e1 within 2 moves to support d7 push. Create check threats (Re8+, Rxe7) to break through before B+N overwhelm. Passed pawn is the only asset. Race toward d…
- llm.plan40276ms · $0.0206
full reasoning
Phase: endgame. d6 immediately, force Rd8 blockade. Activate Ra1→e1 within 2 moves to support d7 push. Create check threats (Re8+, Rxe7) to break through before B+N overwhelm. Passed pawn is the only asset. Race toward d8=Q. Convert blockade into weakness via tempo gains and forcing checks. Critical: d-pawn velocity (d6→d7→d8 is non-negotiable); Ra8 blockade on d-file is Black's forced response; Rook must activate (e1) within 2-3 moves or loses tempo entirely; Nf3 can jump to e5/d4 as nuisance—watch for knight harass.
6. Candidates Candidates: gxf3 (Eliminates harassing knight, clears board for d6-d7-d8 race. Enables Ra1-e1 activation within 2 moves. Highest tempo.) | Kf2 (Centralizes king toward d-file action, prepares d6 advance. Solid safety whi…
- chess.js.legal_moves0ms
- llm.candidates38261ms · $0.0197
full reasoning
Candidates: gxf3 (Eliminates harassing knight, clears board for d6-d7-d8 race. Enables Ra1-e1 activation within 2 moves. Highest tempo.) | Kf2 (Centralizes king toward d-file action, prepares d6 advance. Solid safety while maintaining structure, though knight remains nuisance.) | Kf1 (King move toward center-left, maintains proximity to d-pawn race and rook activation. Alternative to Kf2 if d-file support critical.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: gxf3 — Eliminates Black's harassing knight, clears d-pawn's race to d8, enables Ra1-e1 support within 2 moves. Highest forcing tempo.. Rejected: g1f2, g1f1.
- llm.reflect18273ms · $0.0078
9. Commit Commit gxf3 (g2f3).
44...Kf7Sonnet
1. Observe Halbzug 44, Schwarz am Zug. Phase: Endspiel. Schwarz +2 Punkte. Legale Zuege: 13. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate the rook from a8 to an open central file (d8 or e8), centralize the Black king toward d6/e5 to contest the d5-pawn, and coordinate rook + king to either blockade or win the d5-pawn while advancin…
- llm.plan11906ms · $0.0050
full reasoning
Phase: endgame. Activate the rook from a8 to an open central file (d8 or e8), centralize the Black king toward d6/e5 to contest the d5-pawn, and coordinate rook + king to either blockade or win the d5-pawn while advancing queenside pawns. Convert the +2 material and structural advantage by centralizing the king (opposition principles — memory hit ENDGAME opposition) and using the rook actively to either capture d5 or create a decisive passed pawn on the queenside. Critical: White d5-pawn is passed and advanced — must be blockaded or captured before it queues for promotion; Black king on g8 is too passive — must march to d6/e5 via f7-e6 applying opposition principles (memory hit ENDGAME opposition); Rook on a8 is dormant — activate immediately to d8 to contest the d-file; Lucena/Philidor rook endgame technique (memory hits) becomes relevant once material simplifies further; White rook on a1 is passive — Black should avoid trading into a lost pawn ending and instead maintain rook activity.
6. Candidates Candidates: Kf7 (King centralization toward e6/d6 to blockade d5-pawn; opposition principles demand active king in endgame.) | Rb8 (Activates dormant rook; threatens b-file pressure while preparing to swing to d8 to cont…
- chess.js.legal_moves0ms
- llm.candidates9385ms · $0.0037
full reasoning
Candidates: Kf7 (King centralization toward e6/d6 to blockade d5-pawn; opposition principles demand active king in endgame.) | Rb8 (Activates dormant rook; threatens b-file pressure while preparing to swing to d8 to contest the d-file.) | d6 (Blockades the passed d5-pawn immediately; pawn structure heuristic — stop the advanced passed pawn before it advances further.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kf7 — King centralization is the backbone of endgame technique (memory: ENDGAME opposition). Kf7-e6 blockades d5 with the king itself — more efficient than the d6 pawn-block, which wastes a tempo and weakens …
- llm.reflect11850ms · $0.0038
full reasoning
Final pick: Kf7 — King centralization is the backbone of endgame technique (memory: ENDGAME opposition). Kf7-e6 blockades d5 with the king itself — more efficient than the d6 pawn-block, which wastes a tempo and weakens c6/e6 squares. King on e6 contests d5 directly while freeing the rook on a8 to activate via d8.. Rejected: a8b8, d7d6.
9. Commit Commit Kf7 (g8f7).
45.d6Haiku
1. Observe Halbzug 45, Weiss am Zug. Phase: Endspiel. Schwarz +2 Punkte. Legale Zuege: 16. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Push d6 to force Ra8→d8 blockade, lock Black's rook into passive defense. Activate Ra1 toward e1/f1 within 2-3 moves to create e7-threats and breakthrough support. Maintain pawn tempo and avoid back-rank …
- llm.plan26768ms · $0.0117
full reasoning
Phase: endgame. Push d6 to force Ra8→d8 blockade, lock Black's rook into passive defense. Activate Ra1 toward e1/f1 within 2-3 moves to create e7-threats and breakthrough support. Maintain pawn tempo and avoid back-rank pins. Convert the passed d-pawn into a win by forcing Black's rook into a passive blockade on d8, then exploit rook activation to achieve a winning breakthrough before bishop+pawns establish a fortress. Critical: Opponent forced blockade (Rd8 locks Black's rook; Philidor-principle applies); Own king isolation risk (if Ra1→e1, watch for Rd8+ tactical pins); Pawn velocity dependency (d6→d7→d8 non-negotiable; any delay shifts advantage to Black).
6. Candidates Candidates: d6 (Advances passed pawn, forces blockade on d8, locks Black's rook into passive defense position.) | Re1 (Activates rook toward e-file, creates e7 breakthrough threats, prepares exploit of blockaded rook.) |…
- chess.js.legal_moves0ms
- llm.candidates30208ms · $0.0159
full reasoning
Candidates: d6 (Advances passed pawn, forces blockade on d8, locks Black's rook into passive defense position.) | Re1 (Activates rook toward e-file, creates e7 breakthrough threats, prepares exploit of blockaded rook.) | c4 (Supports pawn advance, maintains tempo, controls central squares, prevents Black queenside counterplay.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d6 — Forces Rd8 blockade, locks Black's rook into passive defense. Then Re1 exploits the blockaded rook with e7 threats. Pawn velocity + rook activation = winning breakthrough before Black can consolidate.. R…
- llm.reflect18757ms · $0.0100
full reasoning
Final pick: d6 — Forces Rd8 blockade, locks Black's rook into passive defense. Then Re1 exploits the blockaded rook with e7 threats. Pawn velocity + rook activation = winning breakthrough before Black can consolidate.. Rejected: a1e1, c3c4.
9. Commit Commit d6 (d5d6).
46...Ke6Sonnet
1. Observe Halbzug 46, Schwarz am Zug. Phase: Endspiel. Schwarz +2 Punkte. Legale Zuege: 15. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate rook from a8 to d8 to blockade or capture the d6-pawn, advance the Black king from f7 toward e6/d7 to support rook and contest the passed pawn, then convert queenside pawn majority into a decisiv…
- llm.plan14872ms · $0.0057
full reasoning
Phase: endgame. Activate rook from a8 to d8 to blockade or capture the d6-pawn, advance the Black king from f7 toward e6/d7 to support rook and contest the passed pawn, then convert queenside pawn majority into a decisive passed pawn. Use the +2 material advantage and active king centralization (opposition principles — ENDGAME opposition memory hit) to eliminate White's dangerous d6-pawn, then activate the rook laterally to exploit White's passive rook on a1 and push queenside pawns to promote. Critical: White d6-pawn is passed and advanced to the 6th rank — Lucena/Philidor rook patterns (memory hits) are directly relevant: we must not allow White king + rook to build a bridge; our rook must reach d8 to blockade or our king must reach e7/d7 to physically stop the pawn; Black king on f7 is already close — king march to e6 or d7 is the fastest blockade and applies opposition pressure against White king on g1; Black rook on a8 is passive — must activate immediately to d8 or an open file; keeping it on a8 wastes the material advantage; White a1-rook is completely passive; Black should not trade unless simplification guarantees a won pawn endgame.
6. Candidates Candidates: Ke6 (King marches to blockade d6-pawn directly; Philidor/Lucena pattern — active king centralization stops passed pawn and applies opposition.) | Rb8 (Activates passive rook immediately; lateral pressure on b…
- chess.js.legal_moves0ms
- llm.candidates9421ms · $0.0039
full reasoning
Candidates: Ke6 (King marches to blockade d6-pawn directly; Philidor/Lucena pattern — active king centralization stops passed pawn and applies opposition.) | Rb8 (Activates passive rook immediately; lateral pressure on b-file and potential swing to d8 to blockade the d6-pawn per memory heuristics.) | b5 (Advances queenside pawn majority; trade only when simplification wins — pushing b5 creates a second passed pawn threat to tie down White.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke6 — King directly blockades the d6-pawn on e6, applying Philidor opposition pressure. White cannot advance d6-d7 without losing it. Active king centralization (memory hit) is faster than rook swing or pawn …
- llm.reflect8837ms · $0.0029
full reasoning
Final pick: Ke6 — King directly blockades the d6-pawn on e6, applying Philidor opposition pressure. White cannot advance d6-d7 without losing it. Active king centralization (memory hit) is faster than rook swing or pawn push.. Rejected: a8b8, b7b5.
9. Commit Commit Ke6 (f7e6).
47.Re1+Haiku
1. Observe Halbzug 47, Weiss am Zug. Phase: Endspiel. Schwarz +2 Punkte. Legale Zuege: 15. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Force Black's rook blockade on d8. Activate Ra1 to e1 within 2 moves to support e7 breakthrough or create secondary threats. Convert passed d-pawn pressure + active rook into a breakthrough before Black's…
- llm.plan44330ms · $0.0217
full reasoning
Phase: endgame. Force Black's rook blockade on d8. Activate Ra1 to e1 within 2 moves to support e7 breakthrough or create secondary threats. Convert passed d-pawn pressure + active rook into a breakthrough before Black's bishop escapes the corner. White converts the d6 passed pawn into a breakthrough by forcing Black's rook into a passive blockade on d8, then exploits rook activation on the e-file to achieve a winning breakthrough while Black's bishop remains trapped. Critical: Black rook will blockade on d8 (immobilized by pawn); White's Ra1 must activate to e1 immediately to prevent back-rank weakness; If Black plays Ra8-a1+ forcing rook trades, endgame favors Black (bishop + pawns dominate without White's rook activity); Black bishop on c8 is dormant; critical to prevent d7-escape routes and keep it out of play.
6. Candidates Candidates: Re1+ (Forces king move, activates rook on e-file to prevent Black Ra1+ counterplay. Critical for d6 breakthrough support.) | c4 (Creates second passed pawn candidate, ties down Black pieces. Multiplies White'…
- chess.js.legal_moves0ms
- llm.candidates23939ms · $0.0111
full reasoning
Candidates: Re1+ (Forces king move, activates rook on e-file to prevent Black Ra1+ counterplay. Critical for d6 breakthrough support.) | c4 (Creates second passed pawn candidate, ties down Black pieces. Multiplies White's breakthrough threats while rook activates.) | f4 (Generates kingside pawn tension and additional breakthrough possibilities. Maintains aggressive pressure during rook activation phase.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Re1+ — Check forces king move; activates rook on e-file with tempo; prevents Black Ra1+ counterplay; secures d6 breakthrough support.. Rejected: c3c4, f3f4.
- llm.reflect13975ms · $0.0053
9. Commit Commit Re1+ (a1e1).
48...Kxd6Sonnet
1. Observe Halbzug 48, Schwarz am Zug. Phase: Endspiel. Schwarz +2 Punkte. Legale Zuege: 5. Schach! Criticality: 0.55.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Capture or neutralize the d6-pawn with king or rook, then activate queenside pawn majority to create a passed pawn and promote. Use the +2 material advantage and centralized Black king to eliminate White'…
- llm.plan11888ms · $0.0041
full reasoning
Phase: endgame. Capture or neutralize the d6-pawn with king or rook, then activate queenside pawn majority to create a passed pawn and promote. Use the +2 material advantage and centralized Black king to eliminate White's d6-pawn, then convert queenside majority into a promotion while White's rook remains passive. Critical: White d6-pawn is advanced and dangerous — must be captured or blockaded immediately; Philidor/Lucena memory hit: Black rook should attack from behind or laterally to neutralize passed pawn; Opposition principle applies: Black king on e6 contests d6-pawn directly and holds key squares; Only 5 legal moves — king must move toward d6 or rook must activate to d8/e8 to blockade; White rook on e1 is active — avoid allowing Re8+ check or rook activation behind pawn.
6. Candidates Candidates: Kxd6 (Captures the dangerous passed pawn immediately; king centralization principle — king on d6 controls c5, e5, d5 squares.) | Kd5 (Blockades d6-pawn via opposition principle; Black king on d5 contests d6 d…
- chess.js.legal_moves0ms
- llm.candidates9006ms · $0.0038
full reasoning
Candidates: Kxd6 (Captures the dangerous passed pawn immediately; king centralization principle — king on d6 controls c5, e5, d5 squares.) | Kd5 (Blockades d6-pawn via opposition principle; Black king on d5 contests d6 directly while activating queenside majority.) | Kf5 (Sidesteps but keeps king active; avoids Re8+ check while preparing to flank the d6-pawn from behind.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxd6 — Captures the d6-pawn immediately, eliminating the primary danger. King on d6 centralizes perfectly, contesting c5/e5/d5 squares and activating queenside pawn majority for promotion. Material advantage …
- llm.reflect9863ms · $0.0030
full reasoning
Final pick: Kxd6 — Captures the d6-pawn immediately, eliminating the primary danger. King on d6 centralizes perfectly, contesting c5/e5/d5 squares and activating queenside pawn majority for promotion. Material advantage +2 converts cleanly.. Rejected: e6d5, e6f5.
9. Commit Commit Kxd6 (e6d6).
49.Re6+Haiku
1. Observe Halbzug 49, Weiss am Zug. Phase: Endspiel. Schwarz +3 Punkte. Legale Zuege: 22. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search18ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate rook with Re6+ to force Black king away, then push c-pawns. Black's rook (a8) and bishop (c8) are uncoordinated and passive. Exploit by creating multiple pawn threats faster than Black can defend…
- llm.plan20776ms · $0.0088
full reasoning
Phase: endgame. Activate rook with Re6+ to force Black king away, then push c-pawns. Black's rook (a8) and bishop (c8) are uncoordinated and passive. Exploit by creating multiple pawn threats faster than Black can defend. Convert Black's material advantage (bishop) into a liability by trapping bishop on c8 and forcing rook to blockade White's pawns while White's active rook dictates play and drives breakthrough. Critical: Re6+ forces king move and activates rook immediately; Black's bishop trapped on c8 — cannot reach center; Black's rook passive on a8 — must respond to pawn threats, becomes blockade-bound; Doubled c-pawns (c2/c3) are weakness BUT can become passed pawn with tempo.
6. Candidates Candidates: Re6+ (Checks king on d6, activates rook to 6th rank controlling queenside. Tempo move forcing Black response.) | Rd1+ (Forces king move via check on d-file. Less directly supporting c-pawns than Re6+ but stil…
- chess.js.legal_moves0ms
- llm.candidates35743ms · $0.0184
full reasoning
Candidates: Re6+ (Checks king on d6, activates rook to 6th rank controlling queenside. Tempo move forcing Black response.) | Rd1+ (Forces king move via check on d-file. Less directly supporting c-pawns than Re6+ but still forcing.) | Re4 (Centralizes rook preparing to support pawn advances and control key squares. Non-forcing but flexible.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Re6+ — Forcing check seizes tempo and activates rook to 6th rank. Controls queenside, supports c-pawn breakthrough. Black's king displaced, bishop trapped, rook forced passive.. Rejected: e1d1, e1e4.
- llm.reflect15385ms · $0.0055
9. Commit Commit Re6+ (e1e6).
50...dxe6Sonnet
1. Observe Halbzug 50, Schwarz am Zug. Phase: Endspiel. Schwarz +3 Punkte. Legale Zuege: 5. Schach! Criticality: 0.55.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search23ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search10ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Neutralize White's Re6 check threat, activate Black king toward queenside pawn majority, convert +3 material into a passed pawn and promotion within 4-5 moves. Use Black's material advantage and centraliz…
- llm.plan13516ms · $0.0046
full reasoning
Phase: endgame. Neutralize White's Re6 check threat, activate Black king toward queenside pawn majority, convert +3 material into a passed pawn and promotion within 4-5 moves. Use Black's material advantage and centralized king to march the queenside pawn majority (a/b/d-pawns) into a passed pawn while White's rook is occupied, forcing promotion. Critical: White Re6 delivers check — Black king must move immediately (only 5 legal moves, in check); Philidor/Lucena memory: once White rook is passive, Black rook must cut off White king laterally to escort the passer; Opposition principle: Black king should head toward c5/b5 to shepherd queenside pawns forward and avoid White king interference; Black's queenside pawn majority (a7/b7/d7) is the winning asset — activate it fast; White has no passed pawn after Re6 check resolves; c3/f3/h2 pawns are static and weak.
6. Candidates Candidates: Kc5 (King heads to queenside majority (c5/b5 opposition principle), avoids rook trade, shepherds a/b pawns forward.) | dxe6 (Eliminates the checking rook immediately, gains material, activates queenside pawn …
- chess.js.legal_moves0ms
- llm.candidates9394ms · $0.0037
full reasoning
Candidates: Kc5 (King heads to queenside majority (c5/b5 opposition principle), avoids rook trade, shepherds a/b pawns forward.) | dxe6 (Eliminates the checking rook immediately, gains material, activates queenside pawn majority per Philidor principle.) | Kd5 (Centralizes king toward queenside majority, keeps rook passive on e6, follows king-activity endgame principle.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: dxe6 — Eliminating the rook immediately gains a full rook of material (already +3 becomes +8 equivalent), removes White's only active piece, and the resulting queenside pawn majority (a7/b7/e6) marches freely…
- llm.reflect9423ms · $0.0030
full reasoning
Final pick: dxe6 — Eliminating the rook immediately gains a full rook of material (already +3 becomes +8 equivalent), removes White's only active piece, and the resulting queenside pawn majority (a7/b7/e6) marches freely with no White counterplay.. Rejected: d6c5, d6d5.
9. Commit Commit dxe6 (d7e6).
51.c4Haiku
1. Observe Halbzug 51, Weiss am Zug. Phase: Endspiel. Schwarz +8 Punkte. Legale Zuege: 10. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search17ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Push c4 to establish passed pawn; simultaneously threaten a4. Force Black's Ra8 and Bc8 into passive defense before they coordinate. Create two-front pawn threats. Advance queenside pawns (c-file, a-file)…
- llm.plan32416ms · $0.0166
full reasoning
Phase: endgame. Push c4 to establish passed pawn; simultaneously threaten a4. Force Black's Ra8 and Bc8 into passive defense before they coordinate. Create two-front pawn threats. Advance queenside pawns (c-file, a-file) toward breakthrough while centralizing king to d4/e4. Black's rook stuck on a8, bishop on c8 is poorly placed. If White can push to c5–c6 and a4–a5 simultaneously, Black will struggle to blockade both threats. Critical: Black +8 material (R+B advantage) is dominant—white must act now; Ra8 and Bc8 uncoordinated—rook far from queenside pawns; White's king isolated g1→must centralize to support breakthroughs; Time-critical: delay allows Black to coordinate pieces and blockade c-pawn.
6. Candidates Candidates: c4 (Advance passed pawn; forces Ra8/Bc8 to respond, threatens c5-c6 breakthrough) | a4 (Create two-front pawn threat; Black's Ra8 cannot defend both c4 and a5) | f4 (Support queenside pawn coordination; activ…
- chess.js.legal_moves0ms
- llm.candidates44265ms · $0.0231
full reasoning
Candidates: c4 (Advance passed pawn; forces Ra8/Bc8 to respond, threatens c5-c6 breakthrough) | a4 (Create two-front pawn threat; Black's Ra8 cannot defend both c4 and a5) | f4 (Support queenside pawn coordination; activate kingside, prepare secondary passed pawn)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c4 — Direct breakthrough threat. Forces Black Ra8/Bc8 into passive blockade, immediately threatens c5-c6. Simultaneously prepares a4 follow-up. Black's pieces uncoordinated; only c4 now prevents their coordin…
- llm.reflect31759ms · $0.0162
full reasoning
Final pick: c4 — Direct breakthrough threat. Forces Black Ra8/Bc8 into passive blockade, immediately threatens c5-c6. Simultaneously prepares a4 follow-up. Black's pieces uncoordinated; only c4 now prevents their coordination.. Rejected: a2a4, f3f4.
9. Commit Commit c4 (c3c4).
52...Kc5Sonnet
1. Observe Halbzug 52, Schwarz am Zug. Phase: Endspiel. Schwarz +8 Punkte. Legale Zuege: 17. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate Black king toward queenside pawn majority (a7/b7), create a passed pawn on the a- or b-file, and march it to promotion while White's king is too far to stop it. Convert the +8 material advantage …
- llm.plan15401ms · $0.0043
full reasoning
Phase: endgame. Activate Black king toward queenside pawn majority (a7/b7), create a passed pawn on the a- or b-file, and march it to promotion while White's king is too far to stop it. Convert the +8 material advantage by advancing the queenside pawn majority into an unstoppable passed pawn, using the centralized Black king to escort it to promotion. Critical: White has only a c4-pawn and a few kingside pawns — no real counterplay; Black king on d6 is already centralized; march it to c5 or b5 to support the queenside advance; Philidor/Opposition memory: Black king must reach b4 or a4 to outpace White king and escort the passer; No rooks on board — pure king-and-pawn endgame; opposition principle is decisive; White c4-pawn must be neutralized or blockaded before Black pawns can freely advance.
6. Candidates Candidates: Kc5 (King centralizes toward queenside majority, directly attacking c4-pawn and supporting b5/a5 advance. Opposition principle: outpace White king.) | b5 (Activates queenside pawn majority immediately, create…
- chess.js.legal_moves0ms
- llm.candidates9382ms · $0.0038
full reasoning
Candidates: Kc5 (King centralizes toward queenside majority, directly attacking c4-pawn and supporting b5/a5 advance. Opposition principle: outpace White king.) | b5 (Activates queenside pawn majority immediately, creates passed pawn structure. Trade only when you gain: b5 gains space.) | a5 (Advances second queenside pawn, preparing a4 passed pawn. Long-term pawn structure improvement — avoids isolated pawn liabilities.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kc5 — King centralizes first — attacks c4 directly, supports b5/a5, and applies opposition principle. White king on g1 is too far; Kc5 outpaces it to escort the queenside majority.. Rejected: b7b5, a7a5.
- llm.reflect8870ms · $0.0026
9. Commit Commit Kc5 (d6c5).
53.a4Haiku
1. Observe Halbzug 53, Weiss am Zug. Phase: Endspiel. Schwarz +8 Punkte. Legale Zuege: 10. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search12ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. c5 forces Black's King away from queenside. Then a4 creates second passed pawn. Force Ra8 and Bc8 into reactive defense, generating practical complications despite material deficit. Create passed pawn thr…
- llm.plan28236ms · $0.0130
full reasoning
Phase: endgame. c5 forces Black's King away from queenside. Then a4 creates second passed pawn. Force Ra8 and Bc8 into reactive defense, generating practical complications despite material deficit. Create passed pawn threats to complicate Black's R+B conversion; maximize piece defensive burden to delay inevitable loss. Critical: Black's King on c5 actively supports defense—c5+ is forcing and gains tempo; Ra8 far from queenside but threatens Ra1+ checks when White activates; Bishop on c8 can defend after King moves (Bd7, Be6, etc.); White's King on g1 remains passive—no time for slow kingside expansion; R+B material advantage overwhelming—White's only chance is tactical complications via passed pawns.
6. Candidates Candidates: a4 (Queenside passed pawn activation forces Black Rook away from defense. Creates a5-a6 breakthrough threat.) | f4 (Kingside pawn push creates second passed pawn front. Generates practical complications despi…
- chess.js.legal_moves0ms
- llm.candidates29737ms · $0.0146
full reasoning
Candidates: a4 (Queenside passed pawn activation forces Black Rook away from defense. Creates a5-a6 breakthrough threat.) | f4 (Kingside pawn push creates second passed pawn front. Generates practical complications despite material deficit.) | a3 (Preparatory advance maintains pawn pressure and complicates Black's coordination between Rook and Bishop.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: a4 — Forces Rook into blockade on queenside, creating second passed pawn threat. Generates practical complications and piece-binding pressure—White's only survival chance with material deficit.. Rejected: f3f…
- llm.reflect22352ms · $0.0105
full reasoning
Final pick: a4 — Forces Rook into blockade on queenside, creating second passed pawn threat. Generates practical complications and piece-binding pressure—White's only survival chance with material deficit.. Rejected: f3f4, a2a3.
9. Commit Commit a4 (a2a4).
54...b5Sonnet
1. Observe Halbzug 54, Schwarz am Zug. Phase: Endspiel. Schwarz +8 Punkte. Legale Zuege: 17. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search18ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Use the centralized Black king on c5 to support the queenside pawn majority (a7/b7), advance b7-b5-b4 to create a passed pawn, and escort it to promotion before White can organize resistance. Convert the …
- llm.plan9886ms · $0.0036
full reasoning
Phase: endgame. Use the centralized Black king on c5 to support the queenside pawn majority (a7/b7), advance b7-b5-b4 to create a passed pawn, and escort it to promotion before White can organize resistance. Convert the +8 material advantage by marching the queenside passed pawn to promotion, using king opposition (memory: opposition heuristic) to outpace White's king. Critical: Opposition heuristic: Black king on c5 already dominates the queenside — maintain proximity to b4/a4 to cut off White king; White's only realistic counterplay is c4-c5 pawn advance — must be neutralized by king blockade; b7-b5 advance is the key first step to create the passed pawn on the b-file.
6. Candidates Candidates: b5 (Activates queenside pawn majority immediately, creating passed pawn foundation; opposition heuristic supports king on c5 covering b4/a4.) | Kb4 (King uses opposition principle to dominate b-file, cuts off…
- chess.js.legal_moves0ms
- llm.candidates8367ms · $0.0037
full reasoning
Candidates: b5 (Activates queenside pawn majority immediately, creating passed pawn foundation; opposition heuristic supports king on c5 covering b4/a4.) | Kb4 (King uses opposition principle to dominate b-file, cuts off White king and escorts future b-pawn to promotion.) | Kd4 (Centralizes king to neutralize White's c4-c5 counterplay threat while maintaining proximity to queenside pawns.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: b5 — Creates the passed pawn immediately. After b5, White cannot stop both a7 and b5 advancing. King on c5 already covers b4/a4 per opposition heuristic — pawn majority activation is the structural priority..…
- llm.reflect8582ms · $0.0029
full reasoning
Final pick: b5 — Creates the passed pawn immediately. After b5, White cannot stop both a7 and b5 advancing. King on c5 already covers b4/a4 per opposition heuristic — pawn majority activation is the structural priority.. Rejected: c5b4, c5d4.
9. Commit Commit b5 (b7b5).
55.axb5Haiku
1. Observe Halbzug 55, Weiss am Zug. Phase: Endspiel. Schwarz +8 Punkte. Legale Zuege: 11. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search11ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Create rapid queenside and kingside pawn threats to maximize Black's defensive burden. Force Rook and Bishop into reactive postures via axb5 or cxb5, then advance c4-c5 and a5-a6 before King stabilizes. E…
- llm.plan53743ms · $0.0290
full reasoning
Phase: endgame. Create rapid queenside and kingside pawn threats to maximize Black's defensive burden. Force Rook and Bishop into reactive postures via axb5 or cxb5, then advance c4-c5 and a5-a6 before King stabilizes. Eliminate b5 pawn obstacle via capture, activate c4 as passed pawn if Black King retreats from c5, push f-pawn. Generate multi-threat tempo to complicate R+B coordination and delay material conversion. Critical: b5 pawn capture decision (axb5 vs cxb5); c4 pawn becomes lethal once King moves away; Black Rook on a8 is far from queenside action; Black Bishop on c8 must defend multiple fronts simultaneously; White must generate pawn threats faster than Black consolidates advantage.
6. Candidates Candidates: axb5 (Eliminates b5 passer, preserves c4 for c5 thrust, generates dual queenside+central pawn threats forcing R+B defensive splits.) | cxb5 (Also captures b5 but sacrifices c4 pawn; creates passed b5 but lose…
- chess.js.legal_moves0ms
- llm.candidates29271ms · $0.0137
full reasoning
Candidates: axb5 (Eliminates b5 passer, preserves c4 for c5 thrust, generates dual queenside+central pawn threats forcing R+B defensive splits.) | cxb5 (Also captures b5 but sacrifices c4 pawn; creates passed b5 but loses the c5 tempo-threat that axb5 preserves.) | a5 (Advances a-pawn without capturing b5; maintains both pawns but b5 obstacle persists, less forcing than capture moves.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: axb5 — Eliminates b5 passer, preserves c4 for c5 breakthrough. Dual threats (b5 + potential c5) force Black's R+B into reactive splits; King must choose between defending queenside or blocking central advance…
- llm.reflect22200ms · $0.0109
full reasoning
Final pick: axb5 — Eliminates b5 passer, preserves c4 for c5 breakthrough. Dual threats (b5 + potential c5) force Black's R+B into reactive splits; King must choose between defending queenside or blocking central advance.. Rejected: c4b5, a4a5.
9. Commit Commit axb5 (a4b5).
56...Kxc4Sonnet
1. Observe Halbzug 56, Schwarz am Zug. Phase: Endspiel. Schwarz +7 Punkte. Legale Zuege: 16. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search13ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance the queenside pawn majority (a7/b7) to create a passed pawn, use the centralized king on c5 to escort it to promotion, neutralize White's c4 pawn with king proximity. Convert the +7 material advan…
- llm.plan9874ms · $0.0033
full reasoning
Phase: endgame. Advance the queenside pawn majority (a7/b7) to create a passed pawn, use the centralized king on c5 to escort it to promotion, neutralize White's c4 pawn with king proximity. Convert the +7 material advantage by promoting a queenside passed pawn, leveraging king opposition (memory: opposition heuristic) to outpace White's king and deny any counterplay from c4. Critical: White's c4 pawn could advance — king must blockade or neutralize it; Black king on c5 already dominates queenside — maintain opposition to cut off White king; Rook endgame heuristics (Philidor/Lucena) not yet relevant — pure king+pawn logic applies here.
6. Candidates Candidates: Kxc4 (Captures White's c4 pawn, eliminates counterplay, king dominates center per opposition heuristic.) | a5 (Advances queenside majority, creates passed pawn threat on a-file to force promotion.) | Kd4 (Cen…
- chess.js.legal_moves0ms
- llm.candidates8503ms · $0.0034
full reasoning
Candidates: Kxc4 (Captures White's c4 pawn, eliminates counterplay, king dominates center per opposition heuristic.) | a5 (Advances queenside majority, creates passed pawn threat on a-file to force promotion.) | Kd4 (Centralizes king, blockades c4 pawn, maintains opposition to cut off White king.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxc4 — Eliminates White's only counterplay (c4 pawn). King dominates center per opposition heuristic, then escorts a7/b7 queenside majority to promotion with no White pawn threat remaining.. Rejected: a7a5, c…
- llm.reflect9888ms · $0.0026
full reasoning
Final pick: Kxc4 — Eliminates White's only counterplay (c4 pawn). King dominates center per opposition heuristic, then escorts a7/b7 queenside majority to promotion with no White pawn threat remaining.. Rejected: a7a5, c5d4.
9. Commit Commit Kxc4 (c5c4).
57.b6Haiku
1. Observe Halbzug 57, Weiss am Zug. Phase: Endspiel. Schwarz +8 Punkte. Legale Zuege: 9. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Push b6 forcing Rb8 blockade, then activate king via c3-Kg2-Ke2 toward the b-pawn. Tie Black's rook to defense and create queening pressure. Position is theoretically lost (R+B converts easily), but White…
- llm.plan46789ms · $0.0228
full reasoning
Phase: endgame. Push b6 forcing Rb8 blockade, then activate king via c3-Kg2-Ke2 toward the b-pawn. Tie Black's rook to defense and create queening pressure. Position is theoretically lost (R+B converts easily), but White's only practical try is advancing the passed pawn and forcing Black into precise blockade defense. Critical: Black rook must blockade at b8 to stop queening; White king g1 needs 5+ moves to support b8; Black bishop c8 coordinates with rook from second rank; Black king controls promotion squares c2-b3-b1; Material advantage gives Black winning chances if rook+bishop coordinate.
6. Candidates Candidates: b6 (Advances passed pawn, forces Black rook blockade on b8, creates immediate queening threat.) | c3 (Prepares king activation via Kg2-Ke2-Kd3, supports b-pawn advance, improves pawn shelter.) | Kg2 (Starts k…
- chess.js.legal_moves0ms
- llm.candidates16438ms · $0.0062
full reasoning
Candidates: b6 (Advances passed pawn, forces Black rook blockade on b8, creates immediate queening threat.) | c3 (Prepares king activation via Kg2-Ke2-Kd3, supports b-pawn advance, improves pawn shelter.) | Kg2 (Starts king march toward b-pawn support, begins Kg2-Ke2 plan to coordinate with advancing pawns.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: b6 — Forces Rb8 blockade immediately, creating concrete pressure. Only practical try in lost position: advance passed pawn and bind Black's rook to defense.. Rejected: c2c3, g1g2.
- llm.reflect13403ms · $0.0047
9. Commit Commit b6 (b5b6).
58...axb6Sonnet
1. Observe Halbzug 58, Schwarz am Zug. Phase: Endspiel. Schwarz +8 Punkte. Legale Zuege: 18. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search4ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance the a-pawn toward promotion while the king on c4 blockades White's c2 pawn. The b6 pawn is a poisoned asset — White's advanced passer — so Black must either capture it or neutralize it. King shoul…
- llm.plan12362ms · $0.0049
full reasoning
Phase: endgame. Advance the a-pawn toward promotion while the king on c4 blockades White's c2 pawn. The b6 pawn is a poisoned asset — White's advanced passer — so Black must either capture it or neutralize it. King should move to b5 to attack b6 directly and escort the a-pawn forward. Convert the +8 material advantage by promoting the a-pawn, using the centralized king to blockade White's c2 pawn and eliminate the b6 threat before it queens. Critical: White's b6 pawn is on the 6th rank — one step from promotion, extremely dangerous; Black king on c4 must immediately address b6 by moving to b5 (attacks b6, covers a6-a5 promotion path); Memory: opposition heuristic — king must take opposition against White king on g1 by centralizing; memory: endgame opposition — maintaining king dominance on the queenside cuts off White's king from defending b6 or promoting c2; White's c2 pawn is a secondary threat but currently blockaded by Black king proximity; a7 pawn is Black's winning trump — escort it to a1 after neutralizing b6.
6. Candidates Candidates: axb6 (Eliminates the dangerous b6 passer — the endgame opposition heuristic demands neutralizing White's most advanced threat first.) | Kb5 (King attacks b6 directly; maintains queenside king dominance to blo…
- chess.js.legal_moves0ms
- llm.candidates8932ms · $0.0037
full reasoning
Candidates: axb6 (Eliminates the dangerous b6 passer — the endgame opposition heuristic demands neutralizing White's most advanced threat first.) | Kb5 (King attacks b6 directly; maintains queenside king dominance to blockade c2 and escort a-pawn, per opposition heuristic.) | Kc5 (Centralizes king, covers b6 and d5, maintaining blockade pressure on c2 pawn while keeping king safe.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: axb6 — Eliminates the b6 passer immediately — a pawn one step from promotion is the most dangerous threat. Per endgame opposition heuristic: neutralize the opponent's most advanced passer before escorting you…
- llm.reflect10052ms · $0.0031
full reasoning
Final pick: axb6 — Eliminates the b6 passer immediately — a pawn one step from promotion is the most dangerous threat. Per endgame opposition heuristic: neutralize the opponent's most advanced passer before escorting your own. Black's a-pawn + king then win cleanly.. Rejected: c4b5, c4c5.
9. Commit Commit axb6 (a7b6).
59.c3Haiku
1. Observe Halbzug 59, Weiss am Zug. Phase: Endspiel. Schwarz +9 Punkte. Legale Zuege: 8. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search13ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance c-pawn to c4 or c3, forcing Black's rook to blockade on b8. Activate White's king via f2-e3-d4 to support the passer and create queening threats. White is materially lost but only practical try is…
- llm.plan49773ms · $0.0300
full reasoning
Phase: endgame. Advance c-pawn to c4 or c3, forcing Black's rook to blockade on b8. Activate White's king via f2-e3-d4 to support the passer and create queening threats. White is materially lost but only practical try is forcing Philidor blockade (Rb8) and racing king activation; if Black errs in defense, c-pawn reaches promotion. Critical: Black rook forced to blockade b8 imminently (or c-pawn advances unchecked); King activation via f2-e3-d4-c5 requires 5+ moves to reach support squares for queening; Black king on c4 controls b3/c3 escape squares (White must reroute via e3-d4 path); Black bishop c8 may cut off White king if committed to c-file prematurely.
6. Candidates Candidates: c3 (Advances passer toward promotion, forces Black's blockade decision (Rb8 or Kxc3).) | f4 (Prepares Kf2-e3 king route; supports pawn advance and creates kingside pressure.) | Kf2 (Starts direct king march t…
- chess.js.legal_moves0ms
- llm.candidates26729ms · $0.0118
full reasoning
Candidates: c3 (Advances passer toward promotion, forces Black's blockade decision (Rb8 or Kxc3).) | f4 (Prepares Kf2-e3 king route; supports pawn advance and creates kingside pressure.) | Kf2 (Starts direct king march toward e3-d4 to support c-pawn's queening race.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c3 — Advances passer immediately, threatens c4-c5, forces Black's rook to b8 blockade. Concrete, forcing; activates Philidor plan.. Rejected: f3f4, g1f2.
- llm.reflect33399ms · $0.0154
9. Commit Commit c3 (c2c3).
60...Kb5Sonnet
1. Observe Halbzug 60, Schwarz am Zug. Phase: Endspiel. Schwarz +9 Punkte. Legale Zuege: 23. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search12ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search11ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Move king from c4 to b5 to capture or blockade the b6 pawn immediately, then advance the a-pawn toward promotion while the king escorts it. The b6 pawn is one step from queening — neutralizing it is the s…
- llm.plan14378ms · $0.0053
full reasoning
Phase: endgame. Move king from c4 to b5 to capture or blockade the b6 pawn immediately, then advance the a-pawn toward promotion while the king escorts it. The b6 pawn is one step from queening — neutralizing it is the single most critical task before converting the material advantage. Use the dominant king on c4/b5 to eliminate the b6 pawn threat, then promote the a-pawn while White's kingside pawns are too slow to matter. Critical: White's b6 pawn is on the 6th rank — one move from queening; Black king must reach b5 immediately to blockade or capture it; Memory hit [ENDGAME opposition]: Black king must maintain active opposition against White king on g1 — centralized king escorts the a-pawn and denies White's king entry; Memory hit [ENDGAME lucena rook]: No rooks present, but the principle of king-in-front-of-pawn applies — Black king leads the a-pawn to promotion; Black's +9 material advantage is decisive only if the b6 passer is neutralized before it queens; White's c3 pawn is blockaded by Black king on c4 — do not abandon this blockade prematurely.
6. Candidates Candidates: Kb5 (King captures or blockades b6 pawn immediately — the single critical task per plan. Memory: king-in-front-of-pawn principle.) | Ra1+ (Forcing White king to move, gaining tempo before advancing. Active ro…
- chess.js.legal_moves0ms
- llm.candidates10109ms · $0.0037
full reasoning
Candidates: Kb5 (King captures or blockades b6 pawn immediately — the single critical task per plan. Memory: king-in-front-of-pawn principle.) | Ra1+ (Forcing White king to move, gaining tempo before advancing. Active rook + king coordination per endgame opposition heuristic.) | Kxc3 (Captures c3 pawn, eliminating White's passed pawn and centralizing king for escort duty.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kb5 — King must blockade b6 immediately — it's one step from queening. King-in-front-of-pawn principle: Kb5 neutralizes the b6 passer and keeps Black's decisive material advantage convertible.. Rejected: a8a1…
- llm.reflect8397ms · $0.0027
full reasoning
Final pick: Kb5 — King must blockade b6 immediately — it's one step from queening. King-in-front-of-pawn principle: Kb5 neutralizes the b6 passer and keeps Black's decisive material advantage convertible.. Rejected: a8a1, c4c3.
9. Commit Commit Kb5 (c4b5).
61.c4+Haiku
1. Observe Halbzug 61, Weiss am Zug. Phase: Endspiel. Schwarz +9 Punkte. Legale Zuege: 8. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search19ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search14ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance c4, force Rb8 blockade. Activate king via f2-e3-d4 toward supporting c5-c6 advance and creating queening threats. White pursues desperate queening race, but Black's Philidor rook blockade (b8 whil…
- llm.plan59770ms · $0.0325
full reasoning
Phase: endgame. Advance c4, force Rb8 blockade. Activate king via f2-e3-d4 toward supporting c5-c6 advance and creating queening threats. White pursues desperate queening race, but Black's Philidor rook blockade (b8 while pawn <6th, switch to back-rank checks at c6) holds draw with best defense. Only Black error enables promotion. Critical: Black rook blockade on b8 is solid; White's king must reach d4-d5 support area—slow 5+ move process while Black maintains defense; Philidor position (rook blockade on 3rd rank) becomes Lucena situation once pawn c6; Black switches to back-rank checks; White's king must build bridge via lateral protection; Only viable plan is c-pawn advance with king support; f3 and h2 pawns irrelevant; if c-pawn stopped without breakthrough, resignation is appropriate.
6. Candidates Candidates: c4+ (Advance c-pawn with check, force Rb8 blockade, initiate main breakthrough) | Kf2 (Activate king toward d4 to support c-pawn advance as per plan) | f4 (Secondary pawn thrust creates additional queening th…
- chess.js.legal_moves0ms
- llm.candidates39742ms · $0.0218
full reasoning
Candidates: c4+ (Advance c-pawn with check, force Rb8 blockade, initiate main breakthrough) | Kf2 (Activate king toward d4 to support c-pawn advance as per plan) | f4 (Secondary pawn thrust creates additional queening threat during c-advance)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c4+ — Forcing advance starts breakthrough. Threatens c5-c6 promotion chain, forces Rb8 blockade, creates concrete threats. Plan requires c-pawn advance as primary lever; king activation follows to support.. R…
- llm.reflect20722ms · $0.0082
full reasoning
Final pick: c4+ — Forcing advance starts breakthrough. Threatens c5-c6 promotion chain, forces Rb8 blockade, creates concrete threats. Plan requires c-pawn advance as primary lever; king activation follows to support.. Rejected: g1f2, f3f4.
9. Commit Commit c4+ (c3c4).
62...Kxc4Sonnet
1. Observe Halbzug 62, Schwarz am Zug. Phase: Endspiel. Schwarz +9 Punkte. Legale Zuege: 7. Schach! Criticality: 0.25.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search13ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. King on b5 already blockades/captures b6 pawn threat; now activate bishop and advance kingside pawns while escorting king toward queening square. Convert overwhelming material advantage before White's pas…
- llm.plan14883ms · $0.0045
full reasoning
Phase: endgame. King on b5 already blockades/captures b6 pawn threat; now activate bishop and advance kingside pawns while escorting king toward queening square. Convert overwhelming material advantage before White's passed c4 pawn becomes relevant. Eliminate White's remaining pawns with king + bishop coordination, then promote one of Black's kingside pawns to win. Critical: White's c4 pawn is passed and could become dangerous if Black ignores it; Memory [ENDGAME opposition]: Black king on b5 must maintain opposition to limit White king mobility; Memory [ENDGAME philidor/lucena]: No rooks present, so king+bishop vs king+pawns — bishop must stay active and cover key squares; Black bishop on c8 is undeveloped — activating it toward the a6-f1 diagonal is priority; White has only 3 pawns (c4, f3, h2) vs Black's b6, e6, g7, h7 — overwhelming material edge.
6. Candidates Candidates: Kxc4 (Eliminates White's only passed pawn (c4), removing the main counter-play. King safety first — no threats after capture.) | Kc6 (Centralizes king to escort b6 pawn and maintain opposition, per endgame op…
- chess.js.legal_moves0ms
- llm.candidates9883ms · $0.0037
full reasoning
Candidates: Kxc4 (Eliminates White's only passed pawn (c4), removing the main counter-play. King safety first — no threats after capture.) | Kc6 (Centralizes king to escort b6 pawn and maintain opposition, per endgame opposition heuristic — limits White king mobility.) | Ka6 (King heads to a6 to support b6 pawn advance; keeps b6 pawn protected while bishop activation follows.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxc4 — Eliminates White's only passed pawn c4 — the sole counter-play. Memory [endgame opposition]: king on c4 then centralizes to d5/e5, escorting Black's pawns. Trade only when you gain: removing c4 gains a…
- llm.reflect10024ms · $0.0031
full reasoning
Final pick: Kxc4 — Eliminates White's only passed pawn c4 — the sole counter-play. Memory [endgame opposition]: king on c4 then centralizes to d5/e5, escorting Black's pawns. Trade only when you gain: removing c4 gains a pawn and activity.. Rejected: b5c6, b5a6.
9. Commit Commit Kxc4 (b5c4).
63.h4Haiku
1. Observe Halbzug 63, Weiss am Zug. Phase: Endspiel. Schwarz +10 Punkte. Legale Zuege: 7. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate kingside pawn race (h2-h4-h5 push) to create promotion threats before Black's superior pieces coordinate blockade. Force Black to respond defensively rather than attack. Material is decisive for …
- llm.plan31790ms · $0.0138
full reasoning
Phase: endgame. Activate kingside pawn race (h2-h4-h5 push) to create promotion threats before Black's superior pieces coordinate blockade. Force Black to respond defensively rather than attack. Material is decisive for Black (Rook+Bishop+2P vs 2P). White's only practical resource: advance h-pawn with maximum speed to generate complexity. Realistic goal is resistance, not victory. Critical: Black's Rook a8 can swing to h-file for blockade in 2-3 moves; Black's b6 pawn is dangerous and restricts White king's queenside options; White's f3-f4 advance blocked by e6 pawn controlling f5; h-pawn is only viable advance; White king on g1 needs 4+ moves to reach d4-supporting area; too slow to aid queenside threats; Black king on c4 is centralized and can pivot to defend either flank.
6. Candidates Candidates: h4 (Aggressive kingside pawn race creates immediate promotion threat. Fastest path forward with h-pawn as White's only practical resource.) | h3 (Steady h-pawn advance preserves flexibility. Slower than h4 bu…
- chess.js.legal_moves0ms
- llm.candidates23473ms · $0.0103
full reasoning
Candidates: h4 (Aggressive kingside pawn race creates immediate promotion threat. Fastest path forward with h-pawn as White's only practical resource.) | h3 (Steady h-pawn advance preserves flexibility. Slower than h4 but maintains pressure while keeping White's options open.) | f4 (Attempts secondary pressure on e-file though blocked by e6. Complements h-pawn strategy if Black commits pieces to h-file.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: h4 — Maximum force in lost position. h4 launches pawn race before Black's Rook blockades (Ra8→h8 takes 2+ moves). Creates h5-h6 promotion threat immediately. Only practical resistance.. Rejected: h2h3, f3f4.
- llm.reflect16260ms · $0.0057
9. Commit Commit h4 (h2h4).
64...Bd7Sonnet
1. Observe Halbzug 64, Schwarz am Zug. Phase: Endspiel. Schwarz +10 Punkte. Legale Zuege: 25. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate bishop to attack or blockade White's passed h4 pawn, advance Black's kingside pawns (e6, h7, g7) with king escort, and promote one pawn. King should move toward center/kingside to support pawn ad…
- llm.plan12543ms · $0.0047
full reasoning
Phase: endgame. Activate bishop to attack or blockade White's passed h4 pawn, advance Black's kingside pawns (e6, h7, g7) with king escort, and promote one pawn. King should move toward center/kingside to support pawn advance while bishop covers key squares. Convert the overwhelming material advantage (+10) by promoting a kingside pawn — bishop clears the path and neutralizes White's h4 pawn, king marches to support e6-e5-e4 or h7-h5 advance. Critical: White h4 pawn is passed and could become a distraction — bishop must monitor or eliminate it; Memory [ENDGAME opposition]: king must maintain active opposition to limit White king's ability to blockade Black's pawns; Memory [ENDGAME philidor rook]: no rooks present, but principle of active king applies — passive king loses tempo in pawn races; Black bishop is on c8 (inactive) — developing it to an active diagonal is the top priority; White king on g1 is far from the action — exploit this with fast pawn advances.
6. Candidates Candidates: Kd5 (Active king toward center exploits White king's distance; supports e6-e5 advance and contests key squares.) | e5 (Advances passed pawn immediately; bishop on c8 covers d7 after, king escorts from c4. Paw…
- chess.js.legal_moves0ms
- llm.candidates8931ms · $0.0035
full reasoning
Candidates: Kd5 (Active king toward center exploits White king's distance; supports e6-e5 advance and contests key squares.) | e5 (Advances passed pawn immediately; bishop on c8 covers d7 after, king escorts from c4. Pawn race begins.) | Bd7 (Activates the inactive bishop; monitors h4 pawn and supports pawn advances on both flanks.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bd7 — Bishop on c8 is the worst piece — activating it to d7 monitors White's h4 pawn (memory: develop worst piece first) and supports both e6-e5 and b6-b5 advances without committing the king prematurely.. Re…
- llm.reflect10369ms · $0.0028
full reasoning
Final pick: Bd7 — Bishop on c8 is the worst piece — activating it to d7 monitors White's h4 pawn (memory: develop worst piece first) and supports both e6-e5 and b6-b5 advances without committing the king prematurely.. Rejected: c4d5, e6e5.
9. Commit Commit Bd7 (c8d7).
65.h5Haiku
1. Observe Halbzug 65, Weiss am Zug. Phase: Endspiel. Schwarz +10 Punkte. Legale Zuege: 7. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Push the h-pawn rapidly to h5-h6-h7 to force Black's Rook into immediate defensive blockade on h-file. Create a concrete promotion threat that demands Black response within 2-3 moves, maintaining practica…
- llm.plan48772ms · $0.0259
full reasoning
Phase: endgame. Push the h-pawn rapidly to h5-h6-h7 to force Black's Rook into immediate defensive blockade on h-file. Create a concrete promotion threat that demands Black response within 2-3 moves, maintaining practical resistance despite material deficit. White's only practical chance is to advance the h-pawn fast enough to generate complications before Black's material advantage converts into checkmate. Critical: Black's Rook will swing to h-file blockade (Ra4+ check forcing king, then Rh4/Rh8) within 2-3 moves; f-pawn cannot race—blocked by e6 and Black's piece control; h-pawn is the only concrete threat; After Rook blockades, Black will coordinate Bishop+King to deliver mate while maintaining the blockade; Material disadvantage (R+B vs two pawns) is theoretically decisive; this is resistance, not recovery.
6. Candidates Candidates: h5 (Advance only viable pawn threat to h5, forces Black's Rook into h-file blockade within 2 moves. Creates h6-h7-h8=Q promotion threat.) | Kf2 (Centralize King to handle imminent Ra4+ checks and prepare to s…
- chess.js.legal_moves0ms
- llm.candidates15045ms · $0.0066
full reasoning
Candidates: h5 (Advance only viable pawn threat to h5, forces Black's Rook into h-file blockade within 2 moves. Creates h6-h7-h8=Q promotion threat.) | Kf2 (Centralize King to handle imminent Ra4+ checks and prepare to support pawn advance. Better than Kg2 for blocking checks.) | f4 (Push second pawn as secondary threat, though e6 blocks effective advancement. Supports h-pawn strategy if breakthrough opens.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: h5 — Only concrete threat: forces Rook blockade Ra4+ then Rh-file within 2 moves. h6-h7-h8=Q promotion threat creates unavoidable complications despite material deficit.. Rejected: g1f2, f3f4.
- llm.reflect25410ms · $0.0107
9. Commit Commit h5 (h4h5).
66...Kd5Sonnet
1. Observe Halbzug 66, Schwarz am Zug. Phase: Endspiel. Schwarz +10 Punkte. Legale Zuege: 32. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search18ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search12ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate king toward e5/d4 to escort e6-e5-e4 advance, use bishop to neutralize White's h5 pawn threat and cover promotion squares, convert +10 material into a passed pawn promotion in 3-5 moves. March th…
- llm.plan13443ms · $0.0051
full reasoning
Phase: endgame. Activate king toward e5/d4 to escort e6-e5-e4 advance, use bishop to neutralize White's h5 pawn threat and cover promotion squares, convert +10 material into a passed pawn promotion in 3-5 moves. March the king to the center to support e6-e5-e4-e3 promotion while bishop monitors the h-file and f3 pawn, rendering White's king helpless against two connected threats. Critical: White h5 pawn is advanced and could queen if Black ignores it — bishop must cover h8 or f6 to neutralize; Memory [ENDGAME opposition]: Black king on c4 already dominates the center — maintain opposition to push White king back and escort e6 pawn; Own weakness: e6 pawn needs king escort to advance safely — king march to d5/e5 is highest priority; White f3 pawn is isolated and blockaded — low threat but bishop can pin it in place; Black g7/h7 pawns are mobile backup — if e-pawn gets stopped, h7-h6xh5 recaptures material.
6. Candidates Candidates: Kd5 (King marches to d5/e5 to escort e6 pawn — Memory [ENDGAME opposition]: dominate center and push White king back.) | e5 (Launch e-pawn advance immediately; connected with king march creates unstoppable e4…
- chess.js.legal_moves0ms
- llm.candidates12552ms · $0.0037
full reasoning
Candidates: Kd5 (King marches to d5/e5 to escort e6 pawn — Memory [ENDGAME opposition]: dominate center and push White king back.) | e5 (Launch e-pawn advance immediately; connected with king march creates unstoppable e4-e3 promotion threat.) | Be8 (Bishop covers h5 pawn's queening square h8 and neutralizes White's advanced h5 threat per plan.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd5 — King to d5 escorts the e6 pawn and dominates the center per memory heuristic on endgame opposition. White h5 is not yet queening — bishop can cover later. King centralization is highest priority to make…
- llm.reflect9472ms · $0.0029
full reasoning
Final pick: Kd5 — King to d5 escorts the e6 pawn and dominates the center per memory heuristic on endgame opposition. White h5 is not yet queening — bishop can cover later. King centralization is highest priority to make e5-e4-e3 unstoppable.. Rejected: e6e5, d7e8.
9. Commit Commit Kd5 (c4d5).
67.h6Haiku
1. Observe Halbzug 67, Weiss am Zug. Phase: Endspiel. Schwarz +10 Punkte. Legale Zuege: 7. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search19ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance h-pawn to h6-h7 within 3 moves to force Black's rook into blockade on h-file. Create concrete promotion threat demanding immediate Black response. Only practical counterplay against material defic…
- llm.plan32938ms · $0.0162
full reasoning
Phase: endgame. Advance h-pawn to h6-h7 within 3 moves to force Black's rook into blockade on h-file. Create concrete promotion threat demanding immediate Black response. Only practical counterplay against material deficit. Push h-pawn relentlessly toward promotion as sole counterplay; f-pawn blocked by e6 is irrelevant. Accept likely loss but generate tactical complications before Black consolidates. Critical: Black rook blockade on h8 forces passive defense within 2-3 moves, eliminating promotion threat; f-pawn dead weight: completely blocked by e6 and Black's control, cannot participate; Material deficit (-10) is technically decisive if Black consolidates; only hope is error induced by h-pawn complications.
6. Candidates Candidates: h6 (Advances promotion threat directly, forces Black's rook into passive blockade, creates sole counterplay) | Kf2 (Centralizes king to support h7 advance and maintain position; prevents Black's easy consolid…
- chess.js.legal_moves0ms
- llm.candidates26730ms · $0.0120
full reasoning
Candidates: h6 (Advances promotion threat directly, forces Black's rook into passive blockade, creates sole counterplay) | Kf2 (Centralizes king to support h7 advance and maintain position; prevents Black's easy consolidation) | f4 (Keeps secondary pawn activity despite e6 blockade; applies minimum pressure in deadlock endgame)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: h6 — Forces Black rook into immediate blockade on h8 within 2 moves. Only practical counterplay against overwhelming material deficit; White's sole winning chance demands instantaneous promotion threat that B…
- llm.reflect15377ms · $0.0053
full reasoning
Final pick: h6 — Forces Black rook into immediate blockade on h8 within 2 moves. Only practical counterplay against overwhelming material deficit; White's sole winning chance demands instantaneous promotion threat that Black cannot ignore.. Rejected: g1f2, f3f4.
9. Commit Commit h6 (h5h6).
68...Ra1+Sonnet
1. Observe Halbzug 68, Schwarz am Zug. Phase: Endspiel. Schwarz +10 Punkte. Legale Zuege: 30. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search12ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate king toward e4/f4 to escort e6-e5-e4 pawn march, use bishop to neutralize White's h6 pawn and cover queening squares, convert +10 material advantage into a passed pawn promotion within 4-6 moves …
- llm.plan11337ms · $0.0047
full reasoning
Phase: endgame. Activate king toward e4/f4 to escort e6-e5-e4 pawn march, use bishop to neutralize White's h6 pawn and cover queening squares, convert +10 material advantage into a passed pawn promotion within 4-6 moves Force a passed pawn on the e-file to promotion while the bishop controls h8/g7 to stop White's h6-h7 advance, rendering White's king and f3 pawn helpless against two simultaneous threats Critical: White h6 pawn is on the 6th rank — bishop must cover g7 or h7 immediately to prevent queening; Memory [ENDGAME opposition]: Black king on d5 has central dominance — maintain active king to escort e6-e5-e4 advance without losing tempo to h-pawn; e6-e5 push requires king support from d4/e4 to avoid being blocked by White king on g1-f2 route; f3 pawn is White's only counterplay besides h6 — bishop must monitor f3-f4 advance.
6. Candidates Candidates: gxh6 (Eliminates White's dangerous h6 passer immediately; memory warns bishop must cover h7/g7 to stop queening threat.) | e5 (Launches the e-pawn march per plan; king on d5 supports advance, memory: maintain…
- chess.js.legal_moves0ms
- llm.candidates8976ms · $0.0037
full reasoning
Candidates: gxh6 (Eliminates White's dangerous h6 passer immediately; memory warns bishop must cover h7/g7 to stop queening threat.) | e5 (Launches the e-pawn march per plan; king on d5 supports advance, memory: maintain active king to escort e6-e5-e4.) | Ra1+ (Forcing check drives White king to h2, gaining tempo before committing to pawn structure changes.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ra1+ — Forcing Kg2/Kh2 gains free tempo before committing structure. White king displaced from g1 loses proximity to e-file, letting Black follow with e5 next move under ideal conditions.. Rejected: g7h6, e6e…
- llm.reflect8384ms · $0.0028
full reasoning
Final pick: Ra1+ — Forcing Kg2/Kh2 gains free tempo before committing structure. White king displaced from g1 loses proximity to e-file, letting Black follow with e5 next move under ideal conditions.. Rejected: g7h6, e6e5.
9. Commit Commit Ra1+ (a8a1).
69.Kg2Haiku
1. Observe Halbzug 69, Weiss am Zug. Phase: Endspiel. Schwarz +10 Punkte. Legale Zuege: 3. Schach! Criticality: 0.45. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search14ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate king from h1 toward f4-f5 area to support the h6 pawn blockade breakout. Force Black's rook into defensive h-file duty. h-pawn is only counterplay—must generate threat within 3 moves or Black con…
- llm.plan38232ms · $0.0182
full reasoning
Phase: endgame. Activate king from h1 toward f4-f5 area to support the h6 pawn blockade breakout. Force Black's rook into defensive h-file duty. h-pawn is only counterplay—must generate threat within 3 moves or Black consolidates completely. Push h6-h7-h8 via king support (Kg2-g3-f4/f5) to force h7 pawn move or capture. This creates the only tactical forcing sequence against material disadvantage. f3 pawn is dead weight (e6 blocks). Critical: h6 pawn locked by h7—cannot advance without king breakthrough or pawn removal; f3 pawn irrelevant (blocked by e6, no role in counterplay); Black rook (a1) can reach h-file in one move (Rh1+) to blockade—window to act is NOW; White king in h1 corner—must escape to g2/g3/f4 to enable h-pawn threats.
6. Candidates Candidates: Kg2 (Activates king toward f4-f5 via planned g3 route. Initiates breakthrough support for h-pawn.) | Kf2 (Direct shortcut to f4-f5 zone supporting h-pawn penetration. Alternative king activation path.) | Kh2 …
- chess.js.legal_moves0ms
- llm.candidates30268ms · $0.0144
full reasoning
Candidates: Kg2 (Activates king toward f4-f5 via planned g3 route. Initiates breakthrough support for h-pawn.) | Kf2 (Direct shortcut to f4-f5 zone supporting h-pawn penetration. Alternative king activation path.) | Kh2 (Maintains h-pawn proximity while transitioning toward f4. Slowest path among candidates.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kg2 — Initiates the explicit breakthrough sequence (Kg2-g3-f4/f5) to support h6 pawn. Activates King toward attacking h7 within 3-move window. Rh1 follows, but Kg3 maintains momentum vs. Black's blockade.. Re…
- llm.reflect93804ms · $0.0512
full reasoning
Final pick: Kg2 — Initiates the explicit breakthrough sequence (Kg2-g3-f4/f5) to support h6 pawn. Activates King toward attacking h7 within 3-move window. Rh1 follows, but Kg3 maintains momentum vs. Black's blockade.. Rejected: g1f2, g1h2.
9. Commit Commit Kg2 (g1g2).
70...gxh6Sonnet
1. Observe Halbzug 70, Schwarz am Zug. Phase: Endspiel. Schwarz +10 Punkte. Legale Zuege: 30. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate rook on the a-file to infiltrate 7th/8th rank, bishop covers h8/g7 to stop h6-h7 queening, king advances toward e4 to escort e6-e5 pawn march and convert +10 material advantage Convert dominant m…
- llm.plan12347ms · $0.0047
full reasoning
Phase: endgame. Activate rook on the a-file to infiltrate 7th/8th rank, bishop covers h8/g7 to stop h6-h7 queening, king advances toward e4 to escort e6-e5 pawn march and convert +10 material advantage Convert dominant material advantage by combining rook activity on the a-file with bishop control of h7/g8 queening square, forcing White into passivity while the e-pawn marches to promotion. Critical: White h6 pawn threatens h7 — bishop must cover g7 or h8 this move or next; Memory [ENDGAME philidor rook]: rook belongs behind advancing pawns or cutting off White king — Ra1 is passive, activate it toward 7th rank; Memory [ENDGAME opposition]: Black king on d5 holds central dominance — king march to e4/f4 maintains that while escorting e6-pawn; White king on g2 is far from queenside — rook can infiltrate before White reorganizes; f3 pawn is isolated and weak — secondary target after h6 is neutralized.
6. Candidates Candidates: gxh6 (Eliminates the h6 pawn threat immediately; Memory [ENDGAME philidor rook]: removes White's only counterplay before activating rook.) | Ra7 (Activates rook to 7th rank per memory heuristic; cuts off Whit…
- chess.js.legal_moves0ms
- llm.candidates10355ms · $0.0038
full reasoning
Candidates: gxh6 (Eliminates the h6 pawn threat immediately; Memory [ENDGAME philidor rook]: removes White's only counterplay before activating rook.) | Ra7 (Activates rook to 7th rank per memory heuristic; cuts off White king and supports e6-e5 pawn march from behind.) | e5 (Advances the passed e-pawn; king on d5 holds opposition memory — supports the march while White king is far on g2.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: gxh6 — Eliminates White's only counterplay (h6-h7 queening threat) immediately. Memory [philidor rook]: remove opponent's passed pawn first, then activate. After gxh6, Black's material advantage converts clea…
- llm.reflect10902ms · $0.0031
full reasoning
Final pick: gxh6 — Eliminates White's only counterplay (h6-h7 queening threat) immediately. Memory [philidor rook]: remove opponent's passed pawn first, then activate. After gxh6, Black's material advantage converts cleanly with Ra7+ and e5 march.. Rejected: a1a7, e6e5.
9. Commit Commit gxh6 (g7h6).
71.f4Haiku
1. Observe Halbzug 71, Weiss am Zug. Phase: Endspiel. Schwarz +11 Punkte. Legale Zuege: 5. Criticality: 0.20. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search15ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Push f-pawn to f4-f5 with king support (Kg3); force Black's rook away from a1 to defend the advancing passer. Only forcing move available. Convert f3 into a passed pawn that demands Black's defensive reso…
- llm.plan46867ms · $0.0224
full reasoning
Phase: endgame. Push f-pawn to f4-f5 with king support (Kg3); force Black's rook away from a1 to defend the advancing passer. Only forcing move available. Convert f3 into a passed pawn that demands Black's defensive resources and slows consolidation of material advantage (R+B+4P). Critical: f4 is immediately forcing—Black king (Kd5) must react or lose time; e6 doesn't control f4; Black rook (Ra1) currently out of play; window of 1-2 tempi before it must defend pawn advance; f5 followed by f6 threatens promotion; Black forced into passive defense rather than active expansion; Material gap (Black +11) makes this purely delaying tactic; no win path, only complication.
6. Candidates Candidates: f4 (Immediately advances passed pawn. Forces Black rook to defend promotion threat. Most forcing, high tempo.) | Kg3 (Supports f-pawn advance. Prepares f5 push. Centralizes king while maintaining pawn-pushing…
- chess.js.legal_moves0ms
- llm.candidates18923ms · $0.0071
full reasoning
Candidates: f4 (Immediately advances passed pawn. Forces Black rook to defend promotion threat. Most forcing, high tempo.) | Kg3 (Supports f-pawn advance. Prepares f5 push. Centralizes king while maintaining pawn-pushing initiative.) | Kh3 (Alternative king maneuver. Maintains flexibility while keeping rook distracted. Slower but less committed.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: f4 — Immediately forcing pawn advance. Threatens f5-f6-f7-f8=Q. Black rook on a1 must defend; king cannot stop pawn alone.. Rejected: g2g3, g2h3.
- llm.reflect17762ms · $0.0073
9. Commit Commit f4 (f3f4).
72...Ra7Sonnet
1. Observe Halbzug 72, Schwarz am Zug. Phase: Endspiel. Schwarz +11 Punkte. Legale Zuege: 28. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search15ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate rook from a1 to 7th or 8th rank to infiltrate White's position, while advancing the Black king toward the center to escort the e6-e5 pawn march; bishop covers the h-file queening threats passivel…
- llm.plan13882ms · $0.0056
full reasoning
Phase: endgame. Activate rook from a1 to 7th or 8th rank to infiltrate White's position, while advancing the Black king toward the center to escort the e6-e5 pawn march; bishop covers the h-file queening threats passively. Convert the +11 material advantage by combining rook infiltration on the 7th/8th rank with king centralization to escort the e-pawn to promotion, while the bishop neutralizes any White pawn promotion threat on h7. Critical: White f4 pawn is isolated and potentially attackable by the Black king or rook; Bishop must remain on the h8-a1 diagonal or g7/h8 squares to prevent the b6/e6 pawns from being outflanked and to stop any White h-pawn queening; Per ENDGAME philidor rook heuristic: rook on a1 is passive — it must swing to the 7th rank (a7 or beyond) to cut off the White king and support pawn advances; per ENDGAME lucena rook: with dominant material, rook belongs actively behind White's position forcing passivity; Black king on d5 should advance toward e4 or c4 to attack f4 and support pawn chain; No immediate White counterplay: White king on g2 is far from action, no passed pawn threat.
6. Candidates Candidates: Ra7 (Rook infiltrates 7th rank per Philidor heuristic, cutting White king and supporting pawn advance.) | Ke4 (King centralizes to attack f4 pawn and escort e5 advance; per plan king marches toward e4.) | e5 …
- chess.js.legal_moves0ms
- llm.candidates9458ms · $0.0034
full reasoning
Candidates: Ra7 (Rook infiltrates 7th rank per Philidor heuristic, cutting White king and supporting pawn advance.) | Ke4 (King centralizes to attack f4 pawn and escort e5 advance; per plan king marches toward e4.) | e5 (Advances passed pawn toward promotion; combines with king centralization for decisive breakthrough.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ra7 — Per Philidor rook heuristic, Ra7 cuts the White king on g2 from the action and activates the passive rook. King and pawns advance next with rook support from behind White's position — the Lucena princip…
- llm.reflect9437ms · $0.0030
full reasoning
Final pick: Ra7 — Per Philidor rook heuristic, Ra7 cuts the White king on g2 from the action and activates the passive rook. King and pawns advance next with rook support from behind White's position — the Lucena principle of rook activity before pawn push applies here.. Rejected: d5e4, e6e5.
9. Commit Commit Ra7 (a1a7).
73.f5Haiku
1. Observe Halbzug 73, Weiss am Zug. Phase: Endspiel. Schwarz +11 Punkte. Legale Zuege: 9. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search15ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. f5 → f6 with Kg3 support, forcing Black rook from a7 into defensive coordination. Only tool in material-lost position is to create an untouchable passed pawn that permanently ties Black's pieces. Advance …
- llm.plan26241ms · $0.0097
full reasoning
Phase: endgame. f5 → f6 with Kg3 support, forcing Black rook from a7 into defensive coordination. Only tool in material-lost position is to create an untouchable passed pawn that permanently ties Black's pieces. Advance f-pawn to f7 if possible, converting it into a far-advanced threat that demands Black's entire defensive structure. In R+B+4P vs Pawn, the only survival mechanism is a fortress-grade barrier. Critical: Rook a7 is 2-3 tempi away from f-file defense—push immediately before Ra4 arrives; King d5 blockades f4 instantly via Ke4—Kg3 support is critical for f5 push; Zugzwang: every move beyond f5 solidifies Black's advantage; no time for sideline king shuffles.
6. Candidates Candidates: f5 (Push pawn immediately before Black's Ra7 can defend f-file. 2-3 tempi advantage before Ke4. Create fortress-grade threat.) | Kg3 (King support for f5→f6→f7 advance. Escort the passed pawn up board. Black'…
- chess.js.legal_moves0ms
- llm.candidates15400ms · $0.0053
full reasoning
Candidates: f5 (Push pawn immediately before Black's Ra7 can defend f-file. 2-3 tempi advantage before Ke4. Create fortress-grade threat.) | Kg3 (King support for f5→f6→f7 advance. Escort the passed pawn up board. Black's only survival mechanism requires rook+bishop tied to stopping it.) | Kf3 (Alternative king support toward f-pawn, centralize for f5 push coordination. Prepare defense line while pawn advances relentlessly.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: f5 — Seizes 2-3 tempo advantage before Ke4 blockade forms. Pawn threat is unstoppable if advanced now (Ra7 not defending f-file). Kg3 escort follows naturally.. Rejected: g2g3, g2f3.
- llm.reflect29271ms · $0.0141
9. Commit Commit f5 (f4f5).
74...exf5Sonnet
1. Observe Halbzug 74, Schwarz am Zug. Phase: Endspiel. Schwarz +11 Punkte. Legale Zuege: 25. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate the rook to the 7th rank (a7 is already there per FEN) to pressure White's back ranks, advance the Black king toward e5/d4 to escort the e-pawn, and use the bishop to neutralize the f5-pawn threa…
- llm.plan12938ms · $0.0052
full reasoning
Phase: endgame. Activate the rook to the 7th rank (a7 is already there per FEN) to pressure White's back ranks, advance the Black king toward e5/d4 to escort the e-pawn, and use the bishop to neutralize the f5-pawn threat or cover queening squares. Convert the +11 material advantage by combining rook dominance on the 7th rank with king centralization escorting the e6-e5 pawn advance to promotion, while the bishop covers the f5-pawn and any White counterplay. Critical: White f5-pawn is advanced and could become dangerous if Black is passive — bishop on d7 must monitor f5 and potential promotion squares; Philidor/Lucena heuristics confirm: rook already on 7th rank (a7) is ideally placed — keep it there or infiltrate further; Black king on d5 is centralized but must advance carefully; White king on g2 is far away — exploit this distance; e6-pawn is the key passer — king must escort it forward while rook cuts off White king laterally; No immediate White threats — Black has full initiative to execute the winning plan methodically.
6. Candidates Candidates: exf5 (Captures dangerous f5-pawn, eliminating White's only counterplay and simplifying the win. Bishop on d7 no longer needs to monitor f5.) | Ke4 (King centralization toward e4/d3 escorts future e-pawn advan…
- chess.js.legal_moves0ms
- llm.candidates9360ms · $0.0039
full reasoning
Candidates: exf5 (Captures dangerous f5-pawn, eliminating White's only counterplay and simplifying the win. Bishop on d7 no longer needs to monitor f5.) | Ke4 (King centralization toward e4/d3 escorts future e-pawn advance. Philidor heuristic: active king escorts passer to promotion.) | Ra2+ (Rook cuts off White king on 2nd rank, exploiting king distance. Rook on 7th already optimal — lateral infiltration adds check.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: exf5 — Eliminates White's only dangerous passer on f5, removing all counterplay. Bishop no longer needs to monitor f5, freeing it. Pawn structure improves: Black keeps e6-pawn as a clean passer escorted by ce…
- llm.reflect8979ms · $0.0029
full reasoning
Final pick: exf5 — Eliminates White's only dangerous passer on f5, removing all counterplay. Bishop no longer needs to monitor f5, freeing it. Pawn structure improves: Black keeps e6-pawn as a clean passer escorted by centralized king on d5.. Rejected: d5e4, a7a2.
9. Commit Commit exf5 (e6f5).
75.Kf3Haiku
1. Observe Halbzug 75, Weiss am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 8. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search4ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Keep White's King mobile and avoid back-rank/edge traps. Seek stalemate (only theoretical draw). Delay checkmate. Position is lost; material deficit (R+B+4P vs K) insurmountable. Best strategy is to prolo…
- llm.plan25874ms · $0.0119
full reasoning
Phase: endgame. Keep White's King mobile and avoid back-rank/edge traps. Seek stalemate (only theoretical draw). Delay checkmate. Position is lost; material deficit (R+B+4P vs K) insurmountable. Best strategy is to prolong survival by staying central, avoiding Rook checks, and hoping for a tactical miracle. Critical: Ra2+ forcing checks imminent; King pinned to d5 control if pushed to edges; h-pawns advancing toward promotion; f5 pawn supports Black's attack.
6. Candidates Candidates: Kf3 (Centralize King, maintain mobility against Rook checks, delay pawn advances through central control.) | Kg3 (Stay central with flexibility, avoid edge traps, prepare to engage kingside pawns.) | Kh3 (Mov…
- chess.js.legal_moves0ms
- llm.candidates34833ms · $0.0188
full reasoning
Candidates: Kf3 (Centralize King, maintain mobility against Rook checks, delay pawn advances through central control.) | Kg3 (Stay central with flexibility, avoid edge traps, prepare to engage kingside pawns.) | Kh3 (Move toward advanced h-pawns to interfere with promotion timing, maintain escape squares.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kf3 — Centralizes King to f3, maximizing mobility vs Rook checks and controlling f5 pawn advance. Avoids corner vulnerability critical in lost positions.. Rejected: g2g3, g2h3.
- llm.reflect25205ms · $0.0086
9. Commit Commit Kf3 (g2f3).
76...Kd4Sonnet
1. Observe Halbzug 76, Schwarz am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 25. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search18ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance the Black king from d5 toward e4/f4 to escort passed pawns and cut off the White king. Use the rook on a7 to restrict White king mobility. Bishop on d7 covers key squares. Convert the +12 material…
- llm.plan10913ms · $0.0037
full reasoning
Phase: endgame. Advance the Black king from d5 toward e4/f4 to escort passed pawns and cut off the White king. Use the rook on a7 to restrict White king mobility. Bishop on d7 covers key squares. Convert the +12 material advantage through coordinated king march and rook dominance. Use king centralization (opposition principle from memory) combined with rook pressure on the 7th rank to shepherd the b6 and f5 pawns toward promotion while the bishop neutralizes any White counterplay. Critical: White king on f3 is close to the f5-pawn — must prevent White king from capturing f5; b6-pawn is a potential passer if rook supports advance; bishop on d7 must remain active covering both f5 and potential promotion squares — do not trade it cheaply.
6. Candidates Candidates: Kd4 (King advances centrally, supports b6-pawn advance and restricts White king mobility per opposition principle.) | Ra3+ (Rook check forces White king back, restricting it from f5-pawn capture; rook pressur…
- chess.js.legal_moves0ms
- llm.candidates12505ms · $0.0077
full reasoning
Candidates: Kd4 (King advances centrally, supports b6-pawn advance and restricts White king mobility per opposition principle.) | Ra3+ (Rook check forces White king back, restricting it from f5-pawn capture; rook pressure on 7th/3rd rank dominance.)
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd4 — King centralization (opposition principle) advances toward e4/d3, escorting b6 passer and cutting off White king from f5. King on d4 dominates the center while bishop on d7 covers f5 safely.. Rejected: …
- llm.reflect12881ms · $0.0023
full reasoning
Final pick: Kd4 — King centralization (opposition principle) advances toward e4/d3, escorting b6 passer and cutting off White king from f5. King on d4 dominates the center while bishop on d7 covers f5 safely.. Rejected: a7a3.
9. Commit Commit Kd4 (d5d4).
77.Kf4Haiku
1. Observe Halbzug 77, Weiss am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 5. Criticality: 0.20. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search19ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Maintain King mobility in center to avoid back-rank mating nets. Delay Black's h-pawn promotion. Seek any tactical reprieve while managing inevitable checkmate. Prolong survival by keeping the King centra…
- llm.plan30397ms · $0.0151
full reasoning
Phase: endgame. Maintain King mobility in center to avoid back-rank mating nets. Delay Black's h-pawn promotion. Seek any tactical reprieve while managing inevitable checkmate. Prolong survival by keeping the King centralized and mobile, resisting being driven to board edges where Black forces immediate mate. Critical: Black's Rook delivers checking attacks that force King toward vulnerable edges; Black's h-pawns (h7, h6) reach promotion in 3-4 moves; f5 pawn controls center; White's King completely isolated—no piece support or counter-play available; Checkmate is material-inevitable; delay through positioning is sole strategy.
6. Candidates Candidates: Kf4 (Centralizes King toward kingside threat. Engages h-pawn danger zone. Maintains mobility and flexibility.) | Kg3 (King advances toward h-pawns while preserving central position and escape routes. Maximum …
- chess.js.legal_moves0ms
- llm.candidates17755ms · $0.0069
full reasoning
Candidates: Kf4 (Centralizes King toward kingside threat. Engages h-pawn danger zone. Maintains mobility and flexibility.) | Kg3 (King advances toward h-pawns while preserving central position and escape routes. Maximum promotion delay.) | Kg2 (Moves toward h-file threats on second rank. Keeps King mobile and flexible for mate postponement.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kf4 — Kf4 centralizes the King directly toward h-pawn threat zone, maximizing promotion delay. Maintains mobility to respond to h5 with Kg5 or to Ra4+ checks. Only active defense.. Rejected: f3g3, f3g2.
- llm.reflect17255ms · $0.0063
9. Commit Commit Kf4 (f3f4).
78...Kd3Sonnet
1. Observe Halbzug 78, Schwarz am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 22. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search15ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance Black king toward e3/f3 to contest White king and escort f5-pawn. Rook on a7 stays active to cut off White king laterally. Bishop covers promotion-square diagonals. Convert +12 advantage by pushin…
- llm.plan16791ms · $0.0044
full reasoning
Phase: endgame. Advance Black king toward e3/f3 to contest White king and escort f5-pawn. Rook on a7 stays active to cut off White king laterally. Bishop covers promotion-square diagonals. Convert +12 advantage by pushing b6 and f5 pawns toward queening. Centralize Black king using opposition principle (memory hit: opposition heuristic) to push White king away from f5-pawn, then coordinate rook + bishop to escort pawns to promotion — Lucena bridge-building pattern (memory hit) will apply once a pawn reaches the 7th rank. Critical: White king on f4 is one step from capturing f5-pawn — Black king must contest f3/e3 immediately; b6-pawn is remote but safe; f5 is the urgent pawn requiring king escort; Rook must not go passive — keep it cutting off White king on the a-file or 7th rank; Bishop on d7 must stay active covering f5 and potential promotion squares.
6. Candidates Candidates: Kd3 (King advances toward e3/f3 to contest White king on f4, directly applying opposition principle to escort f5-pawn.) | Kd5 (Centralizes king toward f5-pawn escort route; memory heuristic: opposition princi…
- chess.js.legal_moves0ms
- llm.candidates15371ms · $0.0089
full reasoning
Candidates: Kd3 (King advances toward e3/f3 to contest White king on f4, directly applying opposition principle to escort f5-pawn.) | Kd5 (Centralizes king toward f5-pawn escort route; memory heuristic: opposition principle to push White king away from f5.)
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd3 — Kd3 directly contests e3/f3, cutting White king off from f5-pawn escort. Opposition principle: forces Kf4 away from f5, winning the race to escort the f5-pawn to promotion.. Rejected: d4d5.
- llm.reflect7881ms · $0.0023
9. Commit Commit Kd3 (d4d3).
79.Ke5Haiku
1. Observe Halbzug 79, Weiss am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 3. Criticality: 0.20. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search12ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Maximize King survival by maintaining central position and escape squares; delay promotion checkmate by 5+ moves through mobility. Checkmate is inevitable (material floor); strategy is pure survival—keep …
- llm.plan50275ms · $0.0278
full reasoning
Phase: endgame. Maximize King survival by maintaining central position and escape squares; delay promotion checkmate by 5+ moves through mobility. Checkmate is inevitable (material floor); strategy is pure survival—keep King mobile in center (e-g files, ranks 3-5) and avoid back-rank or edge-drive mating patterns that allow quick mate in 1-2 moves. Critical: Black h6-pawn reaches h1 in 5 moves; h7 blocked until h6 clears (6-7 total to mate); f5, b6 pawns secondary threat; White King must maintain central mobility (e-g files, ranks 3-5); edges (a/h) or back-rank (rank 1) enable Black mating nets in 1-2 moves; Black Rook (a7) gives checking attacks to drive King toward vulnerable squares; Bishop controls diagonals (e6-f5-g4 line restricts heavily); Zero counter-play: no pieces, pawns, or perpetual-check resources—survival depends entirely on King maneuver timing and escape-square availability.
6. Candidates Candidates: Ke5 (Centralizes King on e-file, rank 5. Maximizes escape squares and mobility in center, delaying edge-driven mating nets.) | Kf3 (Maintains central f-file position at rank 3. Preserves escape-square density…
- chess.js.legal_moves0ms
- llm.candidates29228ms · $0.0154
full reasoning
Candidates: Ke5 (Centralizes King on e-file, rank 5. Maximizes escape squares and mobility in center, delaying edge-driven mating nets.) | Kf3 (Maintains central f-file position at rank 3. Preserves escape-square density and avoids directional edge progression.) | Kg3 (Advances to rank 3 but directionally toward g-file edge. Reduces central escape squares and increases mating-net vulnerability.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke5 — Ke5 maximizes central position (e-file, rank 5), preserves vertical escape-square density, and delays edge-driven mating nets. Higher rank (vs Kf3) keeps King mobile away from back-rank tactics.. Reject…
- llm.reflect30298ms · $0.0171
full reasoning
Final pick: Ke5 — Ke5 maximizes central position (e-file, rank 5), preserves vertical escape-square density, and delays edge-driven mating nets. Higher rank (vs Kf3) keeps King mobile away from back-rank tactics.. Rejected: f4f3, f4g3.
9. Commit Commit Ke5 (f4e5).
80...f4Sonnet
1. Observe Halbzug 80, Schwarz am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 24. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search14ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance Black king from d3 toward e3/f4 to contest White king on e5 and shield f5-pawn. Activate rook on a7 to cut White king laterally. Push f5 and b6 pawns toward promotion, using opposition principle (…
- llm.plan13397ms · $0.0040
full reasoning
Phase: endgame. Advance Black king from d3 toward e3/f4 to contest White king on e5 and shield f5-pawn. Activate rook on a7 to cut White king laterally. Push f5 and b6 pawns toward promotion, using opposition principle (memory hit: opposition heuristic) to drive White king away. Convert the +12 material advantage by coordinating king, rook, bishop, and passed pawns — escort f5 to f4/f3 while Black king advances, then apply Lucena bridge-building (memory hit) once a pawn reaches the 7th rank. Critical: White king on e5 is dangerously close to f5-pawn — Black king must advance immediately to contest; Rook on a7 must maintain lateral cut to prevent White king from triangulating; Bishop on d7 covers key promotion diagonals — do not trade it away carelessly.
6. Candidates Candidates: Ke3 (King advances toward f4/e4, contesting White king on e5 using opposition principle — critical heuristic hit.) | f4 (Pushes passed f-pawn toward promotion, forcing White king to react and relinquishing e5…
- chess.js.legal_moves0ms
- llm.candidates9478ms · $0.0035
full reasoning
Candidates: Ke3 (King advances toward f4/e4, contesting White king on e5 using opposition principle — critical heuristic hit.) | f4 (Pushes passed f-pawn toward promotion, forcing White king to react and relinquishing e5 control.) | Ra5+ (Lateral rook check drives White king away from e5, maintaining rook cut — heuristic suggestion confirmed.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: f4 — Pushing f4 forces White king off e5 immediately — it cannot stay and allow f3/f2. Black king on d3 then escorts to f3. Pawn structure heuristic: advance passed pawns when opponent king must react.. Rejec…
- llm.reflect9408ms · $0.0029
full reasoning
Final pick: f4 — Pushing f4 forces White king off e5 immediately — it cannot stay and allow f3/f2. Black king on d3 then escorts to f3. Pawn structure heuristic: advance passed pawns when opponent king must react.. Rejected: d3e3, a7a5.
9. Commit Commit f4 (f5f4).
81.Kd5Haiku
1. Observe Halbzug 81, Weiss am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 4. Criticality: 0.20. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search17ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Keep King mobile and central. Avoid moves that restrict escape routes or enable Black's mating net in next 2–3 moves. Checkmate is inevitable (K vs R+B+4P). Strategy is pure survival: delay mate 5+ moves …
- llm.plan53769ms · $0.0296
full reasoning
Phase: endgame. Keep King mobile and central. Avoid moves that restrict escape routes or enable Black's mating net in next 2–3 moves. Checkmate is inevitable (K vs R+B+4P). Strategy is pure survival: delay mate 5+ moves by avoiding edge traps and maintaining central mobility. Critical: h6-pawn is main threat (5 moves to h1=Q, then mating), f4-pawn secondary; Black Rook a7 + Bishop d7 control key escape routes; avoid squares that funnel King to back-rank or h-file; White King must stay central (e–f files, ranks 3–6) to maximize future escape squares and delay mating patterns.
6. Candidates Candidates: Kxf4 (Eliminates secondary threat, reduces Black's mating material, keeps King central and mobile for delay.) | Kd5 (Maintains central positioning with maximum flexibility, preserves multiple escape routes, a…
- chess.js.legal_moves0ms
- llm.candidates15366ms · $0.0063
full reasoning
Candidates: Kxf4 (Eliminates secondary threat, reduces Black's mating material, keeps King central and mobile for delay.) | Kd5 (Maintains central positioning with maximum flexibility, preserves multiple escape routes, avoids h-file edge traps.) | Kd6 (Centralized active square, supports future maneuvering against h6-pawn threat, maintains escape options.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd5 — Maintains central control with maximum flexibility. d5 preserves escape routes in all directions—north to d6, south to d4, east to e4/e5, west to c4/c5. Avoids edge exposure where h6-pawn advance become…
- llm.reflect20278ms · $0.0088
full reasoning
Final pick: Kd5 — Maintains central control with maximum flexibility. d5 preserves escape routes in all directions—north to d6, south to d4, east to e4/e5, west to c4/c5. Avoids edge exposure where h6-pawn advance becomes lethal.. Rejected: e5f4, e5d6.
9. Commit Commit Kd5 (e5d5).
82...Ke3Sonnet
1. Observe Halbzug 82, Schwarz am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 26. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search19ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance Black king from d3 toward e3/f3 to escort f4-pawn forward and shield it from White king on d5. Simultaneously activate rook on a7 to cut White king laterally, preventing it from reaching the queen…
- llm.plan9966ms · $0.0042
full reasoning
Phase: endgame. Advance Black king from d3 toward e3/f3 to escort f4-pawn forward and shield it from White king on d5. Simultaneously activate rook on a7 to cut White king laterally, preventing it from reaching the queening square. Push f4-pawn toward f3/f2 while king leads. Convert the +12 material advantage by coordinating king-rook-bishop to escort the f4 passed pawn to promotion, using the opposition principle (memory hit) to keep White king at bay and building a Lucena bridge (memory hit) once the pawn reaches the 7th rank. Critical: White king on d5 is dangerously close to f4-pawn — Black king must advance to e3/f3 immediately to shield it; Rook on a7 must cut White king laterally along a rank to prevent king infiltration; f4-pawn is Black's fastest promotion candidate — escort it with king before White king can blockade.
6. Candidates Candidates: Ke3 (King advances to escort f4-pawn forward, shielding it from White king on d5 per opposition principle.) | f3 (Pushes the passed pawn immediately toward promotion; king on d3 already covers e2/e3 support s…
- chess.js.legal_moves0ms
- llm.candidates8928ms · $0.0036
full reasoning
Candidates: Ke3 (King advances to escort f4-pawn forward, shielding it from White king on d5 per opposition principle.) | f3 (Pushes the passed pawn immediately toward promotion; king on d3 already covers e2/e3 support squares.) | Ra5+ (Check drives White king away laterally, cutting it from f4-pawn; rook activation per Lucena bridge memory hit.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke3 — King must escort f4-pawn immediately per opposition principle. Ke3 shields the pawn from Kd5 infiltration — without king cover, f3 allows Ke4 blockade. King safety first: fix the weakness before pushing…
- llm.reflect9878ms · $0.0029
full reasoning
Final pick: Ke3 — King must escort f4-pawn immediately per opposition principle. Ke3 shields the pawn from Kd5 infiltration — without king cover, f3 allows Ke4 blockade. King safety first: fix the weakness before pushing.. Rejected: f4f3, a7a5.
9. Commit Commit Ke3 (d3e3).
83.Ke5Haiku
1. Observe Halbzug 83, Weiss am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 3. Criticality: 0.20. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search18ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search12ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Centralize King (d–f files, ranks 4–6) to maximize escape squares. Avoid a/h-files and rank 1–2 (mating patterns). Delay h-pawn promotion 5+ moves via perpetual evasion. Checkmate is inevitable (R+B+4P vs…
- llm.plan34736ms · $0.0174
full reasoning
Phase: endgame. Centralize King (d–f files, ranks 4–6) to maximize escape squares. Avoid a/h-files and rank 1–2 (mating patterns). Delay h-pawn promotion 5+ moves via perpetual evasion. Checkmate is inevitable (R+B+4P vs K). Pure survival: stay central and mobile to delay mating net from pawn promotion + R/B coordination. Critical: h-pawn 5 moves to h1=Q (critical threat); Ra7 + Bd7 control escape routes to queenside and back-rank; King must avoid funneling to edge files where mating nets form.
6. Candidates Candidates: Ke5 (Optimal centralization on e5: e-file + rank 5 maximize escape squares, delay mating net via mobility.) | Kd6 (Strong d-file centralization at rank 6. Stays within d–f recommended range, avoids queenside …
- chess.js.legal_moves0ms
- llm.candidates12891ms · $0.0043
full reasoning
Candidates: Ke5 (Optimal centralization on e5: e-file + rank 5 maximize escape squares, delay mating net via mobility.) | Kd6 (Strong d-file centralization at rank 6. Stays within d–f recommended range, avoids queenside drift.) | Kc4 (Centralizes on c4 but drifts queenside from d–f optimal zone. Rank 4 edge acceptable for survival.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke5 — e5 is most central: e-file + rank 5 maximize escape squares, maximizing distance from mating nets forming on edges.. Rejected: d5d6, d5c4.
- llm.reflect18759ms · $0.0087
9. Commit Commit Ke5 (d5e5).
84...Ra5+Sonnet
1. Observe Halbzug 84, Schwarz am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 26. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search15ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance the f4-pawn toward promotion while Black king on e3 shields it. Rook on a7 cuts White king laterally, preventing it from reaching f4 or the queening square. Coordinate king-rook to escort pawn to …
- llm.plan11365ms · $0.0040
full reasoning
Phase: endgame. Advance the f4-pawn toward promotion while Black king on e3 shields it. Rook on a7 cuts White king laterally, preventing it from reaching f4 or the queening square. Coordinate king-rook to escort pawn to f1/promotion. Convert the decisive material advantage by escorting the f4 passed pawn to promotion using king as shield and rook for lateral king-cutoff, building a Lucena bridge once pawn reaches f7. Critical: White king on e5 is dangerously close to f4-pawn — one tempo loss could allow capture; Opposition principle (memory hit): Black king on e3 directly opposes White king on e5, maintaining opposition freezes White king; Lucena bridge (memory hit): rook lateral cutoff via a-file or rank-cut is the winning technique once pawn advances; f4-pawn must advance immediately before White king can interpose.
6. Candidates Candidates: f3 (Advances passed pawn immediately, applying Lucena technique; king on e3 shields from behind as escort.) | Ra5+ (Check drives White king away from f4-pawn, gaining tempo; lateral cutoff principle from memo…
- chess.js.legal_moves0ms
- llm.candidates9417ms · $0.0034
full reasoning
Candidates: f3 (Advances passed pawn immediately, applying Lucena technique; king on e3 shields from behind as escort.) | Ra5+ (Check drives White king away from f4-pawn, gaining tempo; lateral cutoff principle from memory.) | Ke2 (King advances toward queening square f1, escorting pawn; improves worst piece per structural backbone.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ra5+ — Check forces White king away from f4 immediately. Lateral cutoff principle: Ra5+ drives Ke5 back, then f4-f3-f2 runs freely with Black king on e3 as shield. Gains critical tempo over passive king advan…
- llm.reflect9038ms · $0.0028
full reasoning
Final pick: Ra5+ — Check forces White king away from f4 immediately. Lateral cutoff principle: Ra5+ drives Ke5 back, then f4-f3-f2 runs freely with Black king on e3 as shield. Gains critical tempo over passive king advance.. Rejected: f4f3, e3e2.
9. Commit Commit Ra5+ (a7a5).
85.Kd6Haiku
1. Observe Halbzug 85, Weiss am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 2. Schach! Criticality: 0.45. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search6ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Delay checkmate by keeping King on central files (d–f). Avoid a/h-files and rank 1–2 where Ra5+Bd7 form mating nets. Force Black to coordinate for final mate; resist h-pawn promotion for 5+ moves if possi…
- llm.plan32830ms · $0.0155
full reasoning
Phase: endgame. Delay checkmate by keeping King on central files (d–f). Avoid a/h-files and rank 1–2 where Ra5+Bd7 form mating nets. Force Black to coordinate for final mate; resist h-pawn promotion for 5+ moves if possible. White has no pawns or pieces—only survival tool is King mobility. Central files buy time; edge files guarantee mating nets within 3–4 moves. Critical: h-pawn is 2 moves from h1=Q (h-pawn promotion threat is imminent); Ra5 + Bd7 + Black King control all mating escape routes on a/h-files; White King on e5 must stay d4–d6/e4–e6/f5–f6; rank 1–2 and a/h-files are unwinnable; No defensive resources: no pawns, no pieces to trade or interpose.
6. Candidates Candidates: Kd6 (Central d-file, avoids rank-5 Ra5+ threat. Delays mate by staying on central files.) | Kf6 (Central f-file mobility. Maintains King activity, evades Ra5+ mating net coordination.)
- chess.js.legal_moves0ms
- llm.candidates21279ms · $0.0091
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd6 — Stays on the d-file—true central ground. Delays mate best by anchoring at board's core, away from h-pawn threat and Ra5+Bd7 net zones.. Rejected: e5f6.
- llm.reflect48317ms · $0.0273
9. Commit Commit Kd6 (e5d6).
86...Rd5+Sonnet
1. Observe Halbzug 86, Schwarz am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 33. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance the f4 pawn toward promotion. Black king on e3 shields the pawn, rook on a5 cuts the White king laterally. White king on d6 is far — exploit the distance to push f4-f3-f2-f1=Q before White can int…
- llm.plan10873ms · $0.0041
full reasoning
Phase: endgame. Advance the f4 pawn toward promotion. Black king on e3 shields the pawn, rook on a5 cuts the White king laterally. White king on d6 is far — exploit the distance to push f4-f3-f2-f1=Q before White can interfere. Convert the massive material advantage by escorting the f4 passed pawn to promotion, using the king as a shield on e3/f2 and the rook to cut off the White king horizontally, referencing Lucena bridge principles once the pawn advances. Critical: White king on d6 is far from f4 — every tempo counts; Rook on a5 must maintain lateral cutoff of White king (Lucena/opposition memory hit); Black king on e3 must stay in front of or beside the pawn to shield it — opposition principle applies; Avoid allowing White king to reach e4 or f3 and block the pawn's path.
6. Candidates Candidates: f3 (Advances passed pawn directly; White king on d6 is far — every tempo counts per Lucena principle.) | Kf2 (King escorts pawn from front/beside, shielding f3-f2-f1 path; opposition principle applied.) | Rd5…
- chess.js.legal_moves0ms
- llm.candidates8937ms · $0.0035
full reasoning
Candidates: f3 (Advances passed pawn directly; White king on d6 is far — every tempo counts per Lucena principle.) | Kf2 (King escorts pawn from front/beside, shielding f3-f2-f1 path; opposition principle applied.) | Rd5+ (Check forces White king to move, maintaining lateral cutoff and gaining tempo for pawn push.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rd5+ — Check forces White king to move immediately, gaining a free tempo. After Kc6/Kc7/Ke6, Black continues f3 with king shielding. Lucena lateral cutoff maintained while accelerating pawn advance.. Rejected…
- llm.reflect8876ms · $0.0027
full reasoning
Final pick: Rd5+ — Check forces White king to move immediately, gaining a free tempo. After Kc6/Kc7/Ke6, Black continues f3 with king shielding. Lucena lateral cutoff maintained while accelerating pawn advance.. Rejected: f4f3, e3f2.
9. Commit Commit Rd5+ (a5d5).
87.Kxd5Haiku
1. Observe Halbzug 87, Weiss am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 3. Schach! Criticality: 0.45. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Resist mating nets by occupying central squares (d4–f6). Avoid a/h-files and ranks 1–2 where Rook+Bishop coordinate for mate. Delay h-pawn promotion as long as possible through King mobility. King surviva…
- llm.plan42285ms · $0.0218
full reasoning
Phase: endgame. Resist mating nets by occupying central squares (d4–f6). Avoid a/h-files and ranks 1–2 where Rook+Bishop coordinate for mate. Delay h-pawn promotion as long as possible through King mobility. King survival hinges on central file occupation—d/e/f files offer escape routes; edges guarantee mating nets within 3–4 moves. Critical: h-pawn on h6 (5 moves from promotion); Ra5+Bd7 mating net forms on edges; Black King on e3 controls d-file transitions; lateral (c/e-file) mobility is only survival tool.
6. Candidates Candidates: Kxd5 (Wins rook, destroys mating net threat (Ra5+Bd7), centralizes King on d5 within survival zone.) | Ke7 (Centralizes King on e-file escape route, avoids a/h-file mating traps, maintains mobility.) | Kc7 (M…
- chess.js.legal_moves0ms
- llm.candidates25243ms · $0.0130
full reasoning
Candidates: Kxd5 (Wins rook, destroys mating net threat (Ra5+Bd7), centralizes King on d5 within survival zone.) | Ke7 (Centralizes King on e-file escape route, avoids a/h-file mating traps, maintains mobility.) | Kc7 (Moves toward queenside but edges closer to perimeter mating zones; lowest priority.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxd5 — Wins rook, eliminates Ra5+Bd7 mating net threat entirely, centralizes King on d5 in survival zone. Material advantage decisive.. Rejected: d6e7, d6c7.
- llm.reflect17851ms · $0.0090
9. Commit Commit Kxd5 (d6d5).
88...f3Sonnet
1. Observe Halbzug 88, Schwarz am Zug. Phase: Endspiel. Schwarz +7 Punkte. Legale Zuege: 17. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance the f4 pawn toward promotion. King on e3 escorts the pawn while keeping White king at distance. The b6 and h-pawns are secondary but valuable; f4 is the primary threat. Push f4-f3-f2-f1=Q within 3…
- llm.plan15369ms · $0.0058
full reasoning
Phase: endgame. Advance the f4 pawn toward promotion. King on e3 escorts the pawn while keeping White king at distance. The b6 and h-pawns are secondary but valuable; f4 is the primary threat. Push f4-f3-f2-f1=Q within 3-4 moves before White king on d5 can close the gap. Convert the +7 material advantage by shepherding the f4 passed pawn to promotion, using the Black king on e3 as a shield — the Opposition heuristic confirms that keeping our king directly in the pawn's path denies White's king access to the promotion square. Critical: White king on d5 is dangerously close to f4 — must calculate whether king can intercept f-pawn before it queens; Opposition heuristic: Black king on e3 must stay ahead of or beside the f-pawn to deny White king entry via e4 or f3; No rook present — this is a pure K+pawns ending; Lucena/Philidor rook patterns from memory are inapplicable, but king-escort and pawn-race logic from Opposition heuristic applies directly; b6 and h6/h7 pawns are distant assets — do not distract from f4 advance unless f-pawn is safely queening; White has no pawns — any Black pawn promotion ends the game immediately.
6. Candidates Candidates: f3 (Direct pawn advance toward promotion; King on e3 escorts via opposition heuristic, White king on d5 cannot intercept in time.) | Be6+ (Check forces White king away from d5, gaining tempo; opposition heuri…
- chess.js.legal_moves0ms
- llm.candidates11858ms · $0.0037
full reasoning
Candidates: f3 (Direct pawn advance toward promotion; King on e3 escorts via opposition heuristic, White king on d5 cannot intercept in time.) | Be6+ (Check forces White king away from d5, gaining tempo; opposition heuristic: denies king access to e4/f3 interception squares.) | Bc6+ (Check deflects White king, improving Black bishop activity while keeping f-pawn escort plan intact per opposition heuristic.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: f3 — Direct pawn advance is the most principled: f3-f2-f1=Q is unstoppable with Black king on e3 escorting. White king on d5 is 4 squares from f1 — too far. No deflection needed.. Rejected: d7e6, d7c6.
- llm.reflect9412ms · $0.0028
9. Commit Commit f3 (f4f3).
89.Ke5Haiku
1. Observe Halbzug 89, Weiss am Zug. Phase: Endspiel. Schwarz +7 Punkte. Legale Zuege: 3. Criticality: 0.20.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Centralize King on d/e/f files to blockade Black's most advanced pawns (h6, f3). Delay h-pawn promotion by forcing Black to maneuver around White's King position. Avoid edge squares where Black's Bishop c…
- llm.plan39732ms · $0.0189
full reasoning
Phase: endgame. Centralize King on d/e/f files to blockade Black's most advanced pawns (h6, f3). Delay h-pawn promotion by forcing Black to maneuver around White's King position. Avoid edge squares where Black's Bishop creates mating patterns. Hold maximum moves by maintaining central file control; h-pawn is the clock (5 moves to promote), and White's only resource is forcing Black's pawns to move slowly through King opposition. Critical: h6 pawn: 5 moves to promotion (h5→h4→h3→h2→h1=Q), highest urgency; f3 pawn: advanced, King-supported, requires constant blockade pressure; King-edge trap: a/h files and ranks 1–2 are death zones; Bishop+pawns execute mate in 3–4 moves if King driven there.
6. Candidates Candidates: Ke5 (Centralizes King on e-file maintaining blockade pressure on f3 and h-pawns simultaneously. Maximum tactical flexibility.) | Kd6 (Advances toward h6 pawn (5-move promotion threat), positions for delay tac…
- chess.js.legal_moves0ms
- llm.candidates18726ms · $0.0087
full reasoning
Candidates: Ke5 (Centralizes King on e-file maintaining blockade pressure on f3 and h-pawns simultaneously. Maximum tactical flexibility.) | Kd6 (Advances toward h6 pawn (5-move promotion threat), positions for delay tactics on kingside, but sacrifices f3 contact.) | Kc4 (Attacks b6 pawn but strategically least critical; losing central file control where f3 and h-pawns pose imminent mate threat.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke5 — Centralizes King on e-file, maintains simultaneous blockade pressure on both f3 and h6 pawns. Maximum tactical flexibility: from e5, King reaches f4 (blockade f3) or f5 (approach h6) in one move.. Rejec…
- llm.reflect16928ms · $0.0060
full reasoning
Final pick: Ke5 — Centralizes King on e-file, maintains simultaneous blockade pressure on both f3 and h6 pawns. Maximum tactical flexibility: from e5, King reaches f4 (blockade f3) or f5 (approach h6) in one move.. Rejected: d5d6, d5c4.
9. Commit Commit Ke5 (d5e5).
90...f2Sonnet
1. Observe Halbzug 90, Schwarz am Zug. Phase: Endspiel. Schwarz +7 Punkte. Legale Zuege: 16. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search13ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance f4 pawn to f3, then f2, then f1=Q. Black king on e3 acts as shield — Opposition heuristic confirms our king in front of the pawn blocks White king's access to f2/f1. Secondary: b6 and h-pawns can …
- llm.plan11358ms · $0.0044
full reasoning
Phase: endgame. Advance f4 pawn to f3, then f2, then f1=Q. Black king on e3 acts as shield — Opposition heuristic confirms our king in front of the pawn blocks White king's access to f2/f1. Secondary: b6 and h-pawns can become threats if White king chases f4. Promote the f4 passed pawn to queen within 3 moves while the Black king on e3 maintains opposition against the White king, converting the +7 material advantage decisively. Critical: White king on e5 is one step from d4/f4 — must calculate if f3 allows Ke5-f4 interception; Opposition heuristic: our king on e3 directly guards f2 and f1 promotion square — do not abandon this post; Bishop on d7 is passive — may need to activate if White king threatens to outflank; f4-f3 is the forcing move; after f3 White king cannot reach f2 in time given Black king covers it.
6. Candidates Candidates: f2 (Advances passed pawn to f2, one step from promotion. King on e3 guards f1 — Opposition heuristic confirms f1 is covered.) | Kf2 (King moves directly to promotion square f1's guard. Patience over panic: se…
- chess.js.legal_moves0ms
- llm.candidates9396ms · $0.0037
full reasoning
Candidates: f2 (Advances passed pawn to f2, one step from promotion. King on e3 guards f1 — Opposition heuristic confirms f1 is covered.) | Kf2 (King moves directly to promotion square f1's guard. Patience over panic: secure f1 before White king reaches d4/e4.) | Ke2 (King escorts pawn down the e-file, improving worst piece (passive king) while maintaining control of promotion path.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: f2 — Advances pawn to f2 with king already on e3 guarding f1. White king on e5 cannot reach f1 in time — Opposition heuristic confirms e3-king controls the promotion square. Forcing and decisive.. Rejected: e…
- llm.reflect9325ms · $0.0030
full reasoning
Final pick: f2 — Advances pawn to f2 with king already on e3 guarding f1. White king on e5 cannot reach f1 in time — Opposition heuristic confirms e3-king controls the promotion square. Forcing and decisive.. Rejected: e3f2, e3e2.
9. Commit Commit f2 (f3f2).
91.Kf6Haiku
1. Observe Halbzug 91, Weiss am Zug. Phase: Endspiel. Schwarz +7 Punkte. Legale Zuege: 3. Criticality: 0.20.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search15ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Blockade or delay f2 pawn (1 move from promotion) via Kd3 or Kd4. Force Black King/Bishop to reposition while White maintains central file control to contest h6 pawn advance. White King must anchor on d3–…
- llm.plan37735ms · $0.0168
full reasoning
Phase: endgame. Blockade or delay f2 pawn (1 move from promotion) via Kd3 or Kd4. Force Black King/Bishop to reposition while White maintains central file control to contest h6 pawn advance. White King must anchor on d3–e4 to create opposition pressure on f2 and h6; goal is to maximize Black's delay through forced reposturing, exploiting any Bishop–King piece interference. Critical: f2 promotes next move unless blockaded (max urgency); h6 pawn 5 moves to h1=Q (secondary clock); Bishop d7 controls e6, f5 (restricts King mobility); White has no pieces, only King — any pawn promotion ends game (material collapse).
6. Candidates Candidates: Kd5 (Centralizes King on d5, maintaining central control and flexibility despite f2 promotion, preserving options to contest h6 pawn.) | Kf6 (Attacks h6 pawn immediately, creating direct threat and forcing Bl…
- chess.js.legal_moves0ms
- llm.candidates54250ms · $0.0288
full reasoning
Candidates: Kd5 (Centralizes King on d5, maintaining central control and flexibility despite f2 promotion, preserving options to contest h6 pawn.) | Kf6 (Attacks h6 pawn immediately, creating direct threat and forcing Black to defend kingside position despite losing f-file.) | Kd6 (Advances toward h6 and kingside, moving toward secondary pawn threat while maintaining some central influence in resulting endgame.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kf6 — Attacks h6 pawn immediately, creating concrete forcing threat. After inevitable f1=Q, White King on f6 is maximally active, contesting secondary pawn and generating practical complications.. Rejected: e…
- llm.reflect43313ms · $0.0224
full reasoning
Final pick: Kf6 — Attacks h6 pawn immediately, creating concrete forcing threat. After inevitable f1=Q, White King on f6 is maximally active, contesting secondary pawn and generating practical complications.. Rejected: e5d5, e5d6.
9. Commit Commit Kf6 (e5f6).
92...f1=Q+Sonnet
1. Observe Halbzug 92, Schwarz am Zug. Phase: Endspiel. Schwarz +7 Punkte. Legale Zuege: 22. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance f2 pawn to f1 and promote to queen. Black king on e3 shields the promotion square — White king on f6 is too far to interfere. Opposition heuristic confirms: our king on e3 controls f2 and f1 direc…
- llm.plan11351ms · $0.0037
full reasoning
Phase: endgame. Advance f2 pawn to f1 and promote to queen. Black king on e3 shields the promotion square — White king on f6 is too far to interfere. Opposition heuristic confirms: our king on e3 controls f2 and f1 directly, preventing White king access. Convert the decisive +7 material advantage by promoting the f2 pawn to queen immediately, as the Black king on e3 fully covers the promotion path and White king on f6 cannot return in time. Critical: White king on f6 is far from f1 — cannot reach promotion square in time; Black king on e3 directly guards f2 and f1 per opposition heuristic; f2 pawn is one step from queening — this is the game-ending move; Secondary b6/h-pawns irrelevant — focus is pure promotion.
6. Candidates Candidates: f1=Q+ (Pawn promotes to queen with check — decisive material gain, king on e3 fully covered promotion path per opposition heuristic.) | f1=R+ (Rook promotion with check avoids stalemate risk; king on e3 shiel…
- chess.js.legal_moves0ms
- llm.candidates14359ms · $0.0038
full reasoning
Candidates: f1=Q+ (Pawn promotes to queen with check — decisive material gain, king on e3 fully covered promotion path per opposition heuristic.) | f1=R+ (Rook promotion with check avoids stalemate risk; king on e3 shielded f1, White king on f6 too far to interfere.) | Ke2 (King escorts pawn to queening square — trade only when gaining; here supports f1 promotion if queen promotion blocked.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: f1=Q+ — Queen promotion with check ends the game immediately. King on e3 fully covered f2 and f1 per opposition heuristic. White king on f6 cannot return in time — +7 material is decisive.. Rejected: f2f1r, e…
- llm.reflect8416ms · $0.0027
full reasoning
Final pick: f1=Q+ — Queen promotion with check ends the game immediately. King on e3 fully covered f2 and f1 per opposition heuristic. White king on f6 cannot return in time — +7 material is decisive.. Rejected: f2f1r, e3e2.
9. Commit Commit f1=Q+ (f2f1q).
93.Kg7Haiku
1. Observe Halbzug 93, Weiss am Zug. Phase: Endspiel. Schwarz +15 Punkte. Legale Zuege: 3. Schach! Criticality: 0.45. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Exit check via Kg5 or Kg6, reposition King to contest h-pawn advance (reaches h1=Q in ~5 moves). Attempt blockade on h4-h3 ranks while h7-h6 push conflicts with Queen coordination. Maximize delay against …
- llm.plan55269ms · $0.0290
full reasoning
Phase: endgame. Exit check via Kg5 or Kg6, reposition King to contest h-pawn advance (reaches h1=Q in ~5 moves). Attempt blockade on h4-h3 ranks while h7-h6 push conflicts with Queen coordination. Maximize delay against Black's material conversion. White is objectively lost against Q+B+3P; survival goal is 10-15 moves, exploit stalemate or perpetual-check if opportunity emerges (unlikely). Critical: h6–h7 pawns will promote in ~5 moves without blockade; White King in check from Qf1, must move to legal safe square; Bishop d7 controls e6/f5, severely limiting King's blockading options.
6. Candidates Candidates: Kg7 (Directly contests h-pawns; King on g7 forces Black's h6/h7 decision before h5 push.) | Ke7 (Approaches h-pawn threat from flank; maintains mobility for h5-h4 interception next move.) | Ke5 (Centralizes b…
- chess.js.legal_moves0ms
- llm.candidates56247ms · $0.0335
full reasoning
Candidates: Kg7 (Directly contests h-pawns; King on g7 forces Black's h6/h7 decision before h5 push.) | Ke7 (Approaches h-pawn threat from flank; maintains mobility for h5-h4 interception next move.) | Ke5 (Centralizes but cedes blockade tempo; Black advances h5 uncontested, quickens promotion.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kg7 — Directly contests h-pawns from g7. King attacks h6, controls h5/h7 squares. Forces Black's immediate h-pawn decision, maximizing blockade delay.. Rejected: f6e7, f6e5.
- llm.reflect46900ms · $0.0267
9. Commit Commit Kg7 (f6g7).
94...Qf8+Sonnet
1. Observe Halbzug 94, Schwarz am Zug. Phase: Endspiel. Schwarz +15 Punkte. Legale Zuege: 40. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search19ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Promote the queen on f1 or use existing queen on f1 to deliver checkmate; Black queen on f1 and king on e3 dominate — find fastest mate or decisive check sequence against White king on g7 Convert overwhel…
- llm.plan15533ms · $0.0045
full reasoning
Phase: endgame. Promote the queen on f1 or use existing queen on f1 to deliver checkmate; Black queen on f1 and king on e3 dominate — find fastest mate or decisive check sequence against White king on g7 Convert overwhelming material advantage (Black queen + bishop + pawns vs lone White king with g7 pawn) into checkmate as rapidly as possible, using queen to restrict White king while bishop supports. Critical: White g7 pawn is dangerous — it is one step from promotion on g8; must check if it can be stopped; Black queen on f1 already exists — not a promotion scenario; queen + bishop vs White king is a winning material edge; Opposition heuristic: Black king on e3 is centralized and active, White king on g7 is cornered — use queen to drive king toward edge for mate; White has bishop on d7 — FEN shows 3b, meaning White has a dark-squared bishop, not Black; reassess: material is queen + pawns for Black vs bishop + g7 pawn for White.
6. Candidates Candidates: Qf7+ (Drives White king to h8 corner, cutting escape squares — classic queen-drives-king-to-edge principle.) | Qg2+ (Check forces king to h8, then queen tightens mating net while Black king on e3 supports.) |…
- chess.js.legal_moves0ms
- llm.candidates9865ms · $0.0036
full reasoning
Candidates: Qf7+ (Drives White king to h8 corner, cutting escape squares — classic queen-drives-king-to-edge principle.) | Qg2+ (Check forces king to h8, then queen tightens mating net while Black king on e3 supports.) | Qf8+ (Immediate check restricts White king to h7, blocking g7 pawn advance and cornering king.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qf8+ — Qf8+ forces White king to h7, immediately blocking the g7 pawn's promotion path while cornering the king on the h-file edge. Bishop on d7 is pinned from helping. Fastest path to mating net.. Rejected: …
- llm.reflect10463ms · $0.0029
full reasoning
Final pick: Qf8+ — Qf8+ forces White king to h7, immediately blocking the g7 pawn's promotion path while cornering the king on the h-file edge. Bishop on d7 is pinned from helping. Fastest path to mating net.. Rejected: f1f7, f1g2.
9. Commit Commit Qf8+ (f1f8).
95.Kxf8Haiku
1. Observe Halbzug 95, Weiss am Zug. Phase: Endspiel. Schwarz +15 Punkte. Legale Zuege: 2. Schach! Criticality: 0.45. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search13ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Escape check via Kg6 or seize undefended Qf8 with Kxf8. Capturing the Queen transforms material balance and buys time in K+B+P endgame. Otherwise consolidate King on g6 to contest h-pawn advance. Objectiv…
- llm.plan47743ms · $0.0264
full reasoning
Phase: endgame. Escape check via Kg6 or seize undefended Qf8 with Kxf8. Capturing the Queen transforms material balance and buys time in K+B+P endgame. Otherwise consolidate King on g6 to contest h-pawn advance. Objectively lost (Q+B+3P vs K). Exploit undefended Queen capture if legal, then defend against promotion via King blockade on h4-h3 ranks. Survival goal: delay 10-15 moves, seek stalemate or fortress. Critical: Qf8 sits undefended—capturable and game-changing; h-pawns (h7, h6) promote in 4 moves without blockade; Only 2 legal moves (Kg6 or Kxf8); severe King confinement; Bishop d7 locks e6/f5, restricting future blockading options.
6. Candidates Candidates: Kxf8 (Captures undefended Queen, transforms material from -15 to -2) | Kxh7 (Removes h7 pawn, delays promotion threat, consolidates King position)
- chess.js.legal_moves0ms
- llm.candidates24740ms · $0.0122
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxf8 — Capture undefended Queen. Transforms material from hopeless (K vs Q+B+3P) to drawable (K vs B+3P) endgame.. Rejected: g7h7.
- llm.reflect36904ms · $0.0214
9. Commit Commit Kxf8 (g7f8).
96...Kd4Sonnet
1. Observe Halbzug 96, Schwarz am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 19. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search21ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate king toward b6 or h6 pawns to escort one to promotion, while keeping bishop active. White king on f8 is isolated — cut it off from pawn promotion squares. Convert material advantage into a passed…
- llm.plan11399ms · $0.0039
full reasoning
Phase: endgame. Activate king toward b6 or h6 pawns to escort one to promotion, while keeping bishop active. White king on f8 is isolated — cut it off from pawn promotion squares. Convert material advantage into a passed pawn queening or force zugzwang. Push one of the passed pawns (b6 or h6) to promotion while the bishop covers key squares and the king supports, exploiting the opposition principle to keep White king passive. Critical: White king on f8 — must be kept away from b8 or h8 promotion squares; Memory hit: opposition principle — keep White king boxed in, Black king advances to support pawns; b6 and h6 are both one step from b5/h5 — bishop can cover promotion square of one while king escorts the other; No immediate White counterplay — lone king cannot stop two passed pawns on opposite wings.
6. Candidates Candidates: Kd4 (King advances toward b6 pawn, applying opposition principle to box White king away from b8.) | b5 (Advances passed pawn toward promotion; White king on f8 cannot reach b8 in time.) | Bf5 (Bishop activate…
- chess.js.legal_moves0ms
- llm.candidates7925ms · $0.0033
full reasoning
Candidates: Kd4 (King advances toward b6 pawn, applying opposition principle to box White king away from b8.) | b5 (Advances passed pawn toward promotion; White king on f8 cannot reach b8 in time.) | Bf5 (Bishop activates to cover promotion squares, keeping piece active per structural improvement principle.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd4 — King advances to escort b6-b5-b4 push while boxing White king via opposition principle. With king on d4, White on f8 is 6 tempi away from b8 — Black wins the race. Bishop covers h8 stopping h-pawn count…
- llm.reflect9397ms · $0.0029
full reasoning
Final pick: Kd4 — King advances to escort b6-b5-b4 push while boxing White king via opposition principle. With king on d4, White on f8 is 6 tempi away from b8 — Black wins the race. Bishop covers h8 stopping h-pawn counterplay.. Rejected: b6b5, d7f5.
9. Commit Commit Kd4 (e3d4).
97.Kg7Haiku
1. Observe Halbzug 97, Weiss am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 4. Criticality: 0.20.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. King cannot stop h-pawn before promotion. Only play: delay 4-5 moves, blockade h-file (h4/h3), seek stalemate. Objectively lost. Position is beyond saving. Target: King blockade on h-pawn to minimize prom…
- llm.plan28719ms · $0.0125
full reasoning
Phase: endgame. King cannot stop h-pawn before promotion. Only play: delay 4-5 moves, blockade h-file (h4/h3), seek stalemate. Objectively lost. Position is beyond saving. Target: King blockade on h-pawn to minimize promotion threat. Accept loss; maximize defensive resistance. Critical: h-pawn promotes in 4 moves without blockade; White King f8 is 3-4 moves from h-file; Black King d4 centralized, supports pawns; Bishop controls key escape squares.
6. Candidates Candidates: Kg8 (Defends h1, readies blockade on h-file. Positions King near promotion square.) | Kg7 (Advances toward h-pawn directly. Prepares blockade at h6 next turn.) | Kf7 (Maintains flexibility, can pivot to g6/g7…
- chess.js.legal_moves0ms
- llm.candidates37752ms · $0.0209
full reasoning
Candidates: Kg8 (Defends h1, readies blockade on h-file. Positions King near promotion square.) | Kg7 (Advances toward h-pawn directly. Prepares blockade at h6 next turn.) | Kf7 (Maintains flexibility, can pivot to g6/g7 to blockade pawns effectively.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kg7 — Kg7 advances directly toward h-pawn threat, reaches Kg6 blockade-support square in 1 move. Controls h5/h6 pawns. Fastest delay path.. Rejected: f8g8, f8f7.
- llm.reflect34289ms · $0.0177
9. Commit Commit Kg7 (f8g7).
98...Be6Sonnet
1. Observe Halbzug 98, Schwarz am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 19. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search13ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search13ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Push h6 or b6 pawn toward promotion while using bishop to cover key squares and keeping White king boxed away from h8/b8. Opposition principle (memory hit) applies: position Black king to deny White king …
- llm.plan11476ms · $0.0042
full reasoning
Phase: endgame. Push h6 or b6 pawn toward promotion while using bishop to cover key squares and keeping White king boxed away from h8/b8. Opposition principle (memory hit) applies: position Black king to deny White king access to promotion squares. Convert the +6 material advantage by escorting one passed pawn to promotion — h6 is closer to the White king on g7, so b6 is the safer candidate — while the bishop neutralizes White's g7 pawn threat. Critical: White g7 pawn is advanced and dangerous — bishop must control g8 or White queens first; White king on g7 is near h-pawn but far from b-pawn — b6 push exploits this distance; Opposition principle (memory hit): Black king on d4 should advance toward b4-c5 to escort b6 pawn, cutting White king off; Bishop must simultaneously cover g8 to stop g7-g8 promotion.
6. Candidates Candidates: Kc5 (King escorts b6 pawn toward promotion; opposition principle — cuts White king off from b-file, exploiting its distance on g7.) | Be6 (Bishop covers g8 square, neutralizing White's g7 pawn promotion threa…
- chess.js.legal_moves0ms
- llm.candidates9622ms · $0.0037
full reasoning
Candidates: Kc5 (King escorts b6 pawn toward promotion; opposition principle — cuts White king off from b-file, exploiting its distance on g7.) | Be6 (Bishop covers g8 square, neutralizing White's g7 pawn promotion threat while maintaining flexibility to support b-pawn advance.) | b5 (Advances the safer passed b-pawn toward promotion; White king on g7 is far away and cannot intercept in time.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Be6 — White's g7 pawn promotes immediately if g8 is uncontrolled. Be6 covers g8, stopping White from queening first. Only then can Black safely escort b6 to promotion with king.. Rejected: d4c5, b6b5.
- llm.reflect9375ms · $0.0028
9. Commit Commit Be6 (d7e6).
99.Kh8Haiku
1. Observe Halbzug 99, Weiss am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 5. Criticality: 0.20.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Blockade h7 with Kh8, delay promotion to h5 for 4-5 moves. h6 pawn frozen behind h7. Buy tempo against centralized Black King (6 moves to reach h-file). Seek any stalemate/perpetual resource if Black over…
- llm.plan34221ms · $0.0162
full reasoning
Phase: endgame. Blockade h7 with Kh8, delay promotion to h5 for 4-5 moves. h6 pawn frozen behind h7. Buy tempo against centralized Black King (6 moves to reach h-file). Seek any stalemate/perpetual resource if Black overextends. Objectively lost (K vs K+B+3P). Maximize resistance by blockading h7. Accept promotion; minimize Black's winning margin. Critical: h-pawn will promote in 4-5 moves without blockade; Kh8 delays indefinitely until Black King reaches h-file; Black King d4 centralized but 6-7 tempo away from defending h8; Bishop e6 controls h3 (not h8), limits escape squares but does not defend h-file immediately; b6 pawn is slow threat; h-pawns are immediate threat.
6. Candidates Candidates: Kh8 (Blockades h7 indefinitely, forces Black King to advance 4-5 moves from d4 to support pawn) | Kxh7 (Captures h-pawn but surrenders blockade resource; h6 pawn advances immediately toward promotion) | Kf6 (…
- chess.js.legal_moves0ms
- llm.candidates26241ms · $0.0131
full reasoning
Candidates: Kh8 (Blockades h7 indefinitely, forces Black King to advance 4-5 moves from d4 to support pawn) | Kxh7 (Captures h-pawn but surrenders blockade resource; h6 pawn advances immediately toward promotion) | Kf6 (Active King positioning toward Black, but allows h6 to advance while blockade is abandoned)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kh8 — Blockades h7 indefinitely. Black King d4 requires 4-5 moves to reach h-file support. Maximum tempo gain against inevitable promotion.. Rejected: g7h7, g7f6.
- llm.reflect18232ms · $0.0076
9. Commit Commit Kh8 (g7h8).
100...Kc3Sonnet
1. Observe Halbzug 100, Schwarz am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 21. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search20ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search15ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance b6-pawn toward b1 promotion while bishop covers critical squares; keep Black king active to escort pawn and deny White king a return path from h8 toward queenside Convert the +6 material advantage…
- llm.plan13925ms · $0.0052
full reasoning
Phase: endgame. Advance b6-pawn toward b1 promotion while bishop covers critical squares; keep Black king active to escort pawn and deny White king a return path from h8 toward queenside Convert the +6 material advantage by promoting the b6-pawn — it is far from the White king on h8 and represents the fastest winning path — while the bishop neutralizes any residual White counterplay. Critical: White king is on h8 — very far from b6/b5/b4, making the b-pawn a nearly unstoppable runner; Bishop must not be used passively — it should actively cut off White king return routes (covering e5/d4/c3/b2 diagonal) while Black king escorts the pawn; Opposition principle (memory hit) applies: Black king on d4 is well-centralized — march it toward c3-b2 to escort the pawn directly; The h6/h7 pawns are not a factor — White king on h8 is already blocked by own h7 structure, no White pawns exist to promote; No White counterplay exists — 21 legal moves means full freedom; prioritize decisive king march over any waiting moves.
6. Candidates Candidates: b5 (Advance passer directly; White king on h8 is 7+ tempi away, pawn runs freely.) | Kc3 (King escorts pawn via opposition principle; centralizes to b2 escort path immediately.) | Bd5 (Bishop cuts off White k…
- chess.js.legal_moves0ms
- llm.candidates8909ms · $0.0034
full reasoning
Candidates: b5 (Advance passer directly; White king on h8 is 7+ tempi away, pawn runs freely.) | Kc3 (King escorts pawn via opposition principle; centralizes to b2 escort path immediately.) | Bd5 (Bishop cuts off White king return on d5/e4 diagonal, supporting pawn advance structurally.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kc3 — King escort via opposition principle (memory hit): Kc3 marches directly to b2, creating an unstoppable pawn+king battery. White king on h8 is 7+ tempi away — no interception possible. King activity over…
- llm.reflect8870ms · $0.0030
full reasoning
Final pick: Kc3 — King escort via opposition principle (memory hit): Kc3 marches directly to b2, creating an unstoppable pawn+king battery. White king on h8 is 7+ tempi away — no interception possible. King activity over passive piece moves.. Rejected: b6b5, e6d5.
9. Commit Commit Kc3 (d4c3).
101.Kg7Haiku
1. Observe Halbzug 101, Weiss am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 2. Criticality: 0.20.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search18ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Maintain blockade or capture h7-pawn to delay Black's promotion. Accept objectively lost position. Buy 4-6 moves of resistance while Black King approaches h-file from c3. Deny Black any stalemate cheapsho…
- llm.plan36892ms · $0.0177
full reasoning
Phase: endgame. Maintain blockade or capture h7-pawn to delay Black's promotion. Accept objectively lost position. Buy 4-6 moves of resistance while Black King approaches h-file from c3. Deny Black any stalemate cheapshots. Blockade h7 indefinitely (if Kg7) or reduce pawns by 1 (if Kxh7). Either way: h6 pawn advances unstoppably in 3-4 moves. Black King on c3 reaches h-file in ~6 moves, at which point any blockade collapses. This is K vs K+B+3P — objectively won for Black. White accepts loss, maximizes resistance. Critical: h7 and h6 pawns will promote within 5 moves if blockade breaks; White King has only 2 legal moves (severely confined); Black King on c3 is 6 moves away from h-file defense; No counterplay for White; material deficit is decisive.
6. Candidates Candidates: Kxh7 (Eliminate h7 pawn immediately; reduces Black's promotion material by one; buys time.) | Kg7 (Blockade position; threatens h7; prepares defense against h6 pawn advance while maintaining control.)
- chess.js.legal_moves0ms
- llm.candidates16319ms · $0.0057
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kg7 — Kg7 positions King on g7 to blockade h6 from adjacent square, maintaining both h-pawns immobilized. h7 remains blocked by h6; h6 cannot advance freely with King present. Maximizes resistance.. Rejected:…
- llm.reflect103383ms · $0.0574
full reasoning
Final pick: Kg7 — Kg7 positions King on g7 to blockade h6 from adjacent square, maintaining both h-pawns immobilized. h7 remains blocked by h6; h6 cannot advance freely with King present. Maximizes resistance.. Rejected: h8h7.
9. Commit Commit Kg7 (h8g7).
102...b5Sonnet
1. Observe Halbzug 102, Schwarz am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 21. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search13ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search10ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance the b6-pawn toward promotion while the Black king on c3 escorts it and the bishop cuts off the White king from returning via the queenside diagonal Convert the +6 material advantage by promoting t…
- llm.plan12438ms · $0.0046
full reasoning
Phase: endgame. Advance the b6-pawn toward promotion while the Black king on c3 escorts it and the bishop cuts off the White king from returning via the queenside diagonal Convert the +6 material advantage by promoting the b6-pawn — White king on g7 is too far to catch it, and the bishop actively severs any return route through the center Critical: White king on g7 is 6+ tempi away from b-pawn — the pawn is nearly unstoppable; Memory: Opposition principle — Black king on c3 must stay ahead of or beside the pawn to escort it, denying White king a return path; Bishop on e6 must cover b3/c4/d5 diagonal to block White king re-entry — passive bishop placement wastes the winning advantage; No White counterplay — h7-pawn is pinned by Black's own structure and does not promote quickly; b6 pawn push to b5 is the priority; king follows to b4/c4 to escort.
6. Candidates Candidates: b5 (Direct pawn advance toward promotion; White king on g7 is 6+ tempi away and cannot catch it.) | Kb4 (King escorts pawn from b4, maintaining opposition principle — king stays ahead of pawn on the promotion…
- chess.js.legal_moves0ms
- llm.candidates10398ms · $0.0035
full reasoning
Candidates: b5 (Direct pawn advance toward promotion; White king on g7 is 6+ tempi away and cannot catch it.) | Kb4 (King escorts pawn from b4, maintaining opposition principle — king stays ahead of pawn on the promotion path.) | Bd5 (Bishop covers b3/c4/d5 diagonal, severing White king re-entry route and passively supporting pawn advance.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: b5 — Direct pawn advance is the fastest winning plan. White king on g7 needs 6+ tempi to reach b1; b5-b4-b3-b2-b1 is unstoppable. King and bishop coordinate naturally after.. Rejected: c3b4, e6d5.
- llm.reflect9875ms · $0.0027
9. Commit Commit b5 (b6b5).
103.Kxh6Haiku
1. Observe Halbzug 103, Weiss am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 5. Criticality: 0.20.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search21ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Blockade h7 pawn indefinitely if Kg7 holds position. If not sustainable, allow h-pawn advance while controlling promotion square. Deny stalemate. Maximize move count as Black King approaches h-file (6+ mo…
- llm.plan13392ms · $0.0047
full reasoning
Phase: endgame. Blockade h7 pawn indefinitely if Kg7 holds position. If not sustainable, allow h-pawn advance while controlling promotion square. Deny stalemate. Maximize move count as Black King approaches h-file (6+ moves away). White cannot stop all three Black pawns; strategy is to delay h-pawn promotion by maintaining front-rank presence until Black King forces breakthrough or blockade collapses in 4–6 moves. Critical: h7 pawn promotion imminent if blockade breaks (5 moves max); Black King c3 needs ~6 moves to reach h-file and break blockade; White King g7 is only piece that can blockade or capture h-pawn; Bishop e6 controls key squares; limits King mobility; b5 pawn slower but adds pressure if h-pawn consumes White attention.
6. Candidates Candidates: Kxh7 (Removes h7 pawn (nearest promotion), controls promotion square h8) | Kxh6 (Removes h6 pawn but h7 remains closer threat; secondary choice) | Kf8 (Flexible retreat, allows h-pawn advance but preserves Ki…
- chess.js.legal_moves0ms
- llm.candidates80339ms · $0.0480
full reasoning
Candidates: Kxh7 (Removes h7 pawn (nearest promotion), controls promotion square h8) | Kxh6 (Removes h6 pawn but h7 remains closer threat; secondary choice) | Kf8 (Flexible retreat, allows h-pawn advance but preserves King options)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxh6 — Removes most advanced Black pawn (h6). h7 is immediately blockaded by King on h6. Black King needs 5–6 moves to reach h-file and break blockade. Maximum delay before forced breakthrough.. Rejected: g7h…
- llm.reflect71810ms · $0.0379
full reasoning
Final pick: Kxh6 — Removes most advanced Black pawn (h6). h7 is immediately blockaded by King on h6. Black King needs 5–6 moves to reach h-file and break blockade. Maximum delay before forced breakthrough.. Rejected: g7h7, g7f8.
9. Commit Commit Kxh6 (g7h6).
104...Bd7Sonnet
1. Observe Halbzug 104, Schwarz am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 20. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search17ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance the b5-pawn toward b4-b3-b2-b1 while the Black king on c3 escorts it from the front, using the bishop to cut off the White king. The opposition heuristic (memory hit 3) confirms the Black king mus…
- llm.plan13376ms · $0.0048
full reasoning
Phase: endgame. Advance the b5-pawn toward b4-b3-b2-b1 while the Black king on c3 escorts it from the front, using the bishop to cut off the White king. The opposition heuristic (memory hit 3) confirms the Black king must stay ahead of the pawn to deny any White king intervention. White king on h6 is 6+ tempi away — pawn promotion is nearly forced. Convert the +5 material advantage by promoting the b5-pawn, with the Black king escorting via c2-b2 and the bishop covering critical interception squares to keep the White king out of the queenside. Critical: White king on h6 is close to e6-bishop — threat to capture bishop must be monitored first; Bishop on e6 is currently en prise or threatened by White king on h6 — must check and resolve before advancing pawn; Black king on c3 is well-placed to escort b5-pawn but must not abandon bishop defense; Memory: opposition principle — Black king must stay ahead of pawn (c2 next, then b2) to escort safely.
6. Candidates Candidates: Bd7 (Removes bishop from h6 king's attack range; keeps bishop active while pawn advances safely.) | b4 (Advances the passed pawn immediately; Black king on c3 escorts from front per opposition principle.) | K…
- chess.js.legal_moves0ms
- llm.candidates9069ms · $0.0033
full reasoning
Candidates: Bd7 (Removes bishop from h6 king's attack range; keeps bishop active while pawn advances safely.) | b4 (Advances the passed pawn immediately; Black king on c3 escorts from front per opposition principle.) | Kc2 (King moves ahead of pawn to c2, opposition principle: Black king leads pawn to guarantee promotion.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bd7 — Bishop on e6 is attacked by White king on h6. Moving Bd7 removes the en prise piece while keeping it active, then b5-b4-b3 promotion follows safely with king escorting.. Rejected: b5b4, c3c2.
- llm.reflect9014ms · $0.0028
9. Commit Commit Bd7 (e6d7).
105.Kg7Haiku
1. Observe Halbzug 105, Weiss am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 4. Criticality: 0.20.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search14ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Establish blockade via Kg7 on h8 promotion square. Hold against h7 pawn while Black King (c3) requires 6+ moves to approach h-file. Maximize defensive resistance across 5–10 move window. Blockade h7 indef…
- llm.plan34754ms · $0.0165
full reasoning
Phase: endgame. Establish blockade via Kg7 on h8 promotion square. Hold against h7 pawn while Black King (c3) requires 6+ moves to approach h-file. Maximize defensive resistance across 5–10 move window. Blockade h7 indefinitely is unsustainable; eventual loss inevitable. Delay h-pawn promotion via Kg7 while Black King approaches to support breakthrough. Deny stalemate. Critical: h7 pawn threatens promotion if blockade breaks; Kg7 is the only sustainable blockading square; Black King c3 is ~6 moves distant from h-file. White has narrow window to maintain blockade before support arrives; Bishop on d7 has flexibility to support pawn advances or cut off White King's defensive mobility; Bare King cannot defend both pawns; once h7 is broken, b5 pawn becomes unstoppable.
6. Candidates Candidates: Kg7 (Establish blockade on g7, control h8 promotion square. Only sustainable blockading position per plan.) | Kxh7 (Eliminate h7 threat immediately, but King strays from defending b5 pawn. Pragmatic simplific…
- chess.js.legal_moves0ms
- llm.candidates26369ms · $0.0123
full reasoning
Candidates: Kg7 (Establish blockade on g7, control h8 promotion square. Only sustainable blockading position per plan.) | Kxh7 (Eliminate h7 threat immediately, but King strays from defending b5 pawn. Pragmatic simplification.) | Kh5 (Maintain pressure on h7 pawn, keep King in defensive zone. Flexible transition toward h8 blockade.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kg7 — Directly blockades h8 promotion square, paralyzing h7 pawn by controlling h6. Keeps Black King 6+ moves away from supporting breakthrough. Maximizes defensive hold.. Rejected: h6h7, h6h5.
- llm.reflect45291ms · $0.0227
9. Commit Commit Kg7 (h6g7).
106...Kc2Sonnet
1. Observe Halbzug 106, Schwarz am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 18. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search4ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance b5-b4-b3 with king escort on c2-b2, bishop cuts White king off queenside. Promotion in 4-6 moves. Convert +5 material by promoting the b5-pawn; Black king leads from c3→c2→b2, bishop holds interce…
- llm.plan10417ms · $0.0036
full reasoning
Phase: endgame. Advance b5-b4-b3 with king escort on c2-b2, bishop cuts White king off queenside. Promotion in 4-6 moves. Convert +5 material by promoting the b5-pawn; Black king leads from c3→c2→b2, bishop holds interception squares against the distant White king on h6. Critical: White king on h6 is 6+ tempi away — opposition heuristic (memory hit 3) confirms Black king must stay ahead of pawn; Bishop must cover key squares (e.g. a6, c6) to prevent White king re-entry via f5-e4 diagonal; No tactical threats from White; pawn on b5 advances freely with king escort.
6. Candidates Candidates: Kc2 (King leads pawn escort, heads to b2 to support b5-b4-b3 advance. Opposition heuristic: king must stay ahead.) | b4 (Direct pawn advance toward promotion. White king on h6 is 6+ tempi away — pawn advances…
- chess.js.legal_moves0ms
- llm.candidates10585ms · $0.0037
full reasoning
Candidates: Kc2 (King leads pawn escort, heads to b2 to support b5-b4-b3 advance. Opposition heuristic: king must stay ahead.) | b4 (Direct pawn advance toward promotion. White king on h6 is 6+ tempi away — pawn advances freely.) | Bc6 (Bishop covers c6 interception square, blocking White king re-entry via f5-e4 diagonal per plan.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kc2 — King must lead the pawn (opposition heuristic): Kc2→b2 escorts b5→b4→b3→b2→b1 to promotion. White king on h6 is 6+ tempi away — no interception possible.. Rejected: b5b4, d7c6.
- llm.reflect8345ms · $0.0028
9. Commit Commit Kc2 (c3c2).
107.Kh6Haiku
1. Observe Halbzug 107, Weiss am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 7. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search6ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Maintain h7-pawn blockade via Kg7/Kg6 indefinitely. Force Black King (c2) to spend 5-6 moves approaching h-file. Deny stalemate while preserving blockade tension. Theoretical loss (K vs K+B+2P); blockade …
- llm.plan26240ms · $0.0102
full reasoning
Phase: endgame. Maintain h7-pawn blockade via Kg7/Kg6 indefinitely. Force Black King (c2) to spend 5-6 moves approaching h-file. Deny stalemate while preserving blockade tension. Theoretical loss (K vs K+B+2P); blockade is White's sole asset. Goal: delay h-pawn breakthrough 5-10 moves until Black King reaches support square (f6/h6/g6), then inevitable queening. Critical: h7 pawn queens instantly if blockade breaks; Black King c2 is 5-6 moves minimum from f-file support; White's only defensive resource is blockade—lose it, lose immediately; Bishop d7 supports h-pawn and controls critical squares; avoid allowing decisive penetration.
6. Candidates Candidates: Kh6 (Direct blockade of h7 pawn. Maintains White's critical defensive resource.) | Kg8 (Preserves King proximity to h7 pawn. Maintains blockade option for next move.) | Kxh7 (Removes dangerous h-pawn threat. …
- chess.js.legal_moves0ms
- llm.candidates107946ms · $0.0596
full reasoning
Candidates: Kh6 (Direct blockade of h7 pawn. Maintains White's critical defensive resource.) | Kg8 (Preserves King proximity to h7 pawn. Maintains blockade option for next move.) | Kxh7 (Removes dangerous h-pawn threat. Simplifies position despite continued disadvantage.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kh6 — Directly occupies h6, the critical square the h7 pawn needs to advance through. Maintains White's sole defensive resource—the blockade. Any deviation allows h7-h6 and loss.. Rejected: g7g8, g7h7.
- llm.reflect68290ms · $0.0360
9. Commit Commit Kh6 (g7h6).
108...b4Sonnet
1. Observe Halbzug 108, Schwarz am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 16. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance b5-b4 with king escort from c2, bishop secures interception squares to prevent White king re-entry; promote within 4-5 moves Convert +5 material advantage by queening the b-pawn; Black king leads …
- llm.plan8879ms · $0.0033
full reasoning
Phase: endgame. Advance b5-b4 with king escort from c2, bishop secures interception squares to prevent White king re-entry; promote within 4-5 moves Convert +5 material advantage by queening the b-pawn; Black king leads the pawn while bishop neutralizes White king's return diagonal. Critical: White king on h6 is 6+ tempi away — no immediate threat; Opposition heuristic (memory hit 3): Black king must stay ahead of pawn on b-file; Bishop must cover key re-entry squares (e.g. a6, c6, f5 diagonal) to block White king; No White tactical threats; pure conversion task.
6. Candidates Candidates: b4 (Advance pawn immediately; White king on h6 is 6+ tempi away, opposition heuristic confirms pawn must march now.) | Kb3 (King escorts pawn on b-file, staying ahead per opposition heuristic; controls b4-b3-…
- chess.js.legal_moves0ms
- llm.candidates9598ms · $0.0036
full reasoning
Candidates: b4 (Advance pawn immediately; White king on h6 is 6+ tempi away, opposition heuristic confirms pawn must march now.) | Kb3 (King escorts pawn on b-file, staying ahead per opposition heuristic; controls b4-b3-b2 conversion path.) | Bf5 (Bishop covers f5 diagonal, intercepting White king re-entry squares; bishop secures interception per plan.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: b4 — Pawn advances immediately; White king on h6 is 6+ tempi away and cannot intercept. Opposition heuristic confirms pawn must march now — every tempo wasted is a tempo gifted.. Rejected: c2b3, d7f5.
- llm.reflect8568ms · $0.0025
9. Commit Commit b4 (b5b4).
109.Kg7Haiku
1. Observe Halbzug 109, Weiss am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 4. Criticality: 0.20.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search13ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Maintain h7 blockade via Kg7/Kg6 indefinitely. Force Black King 5–6 moves minimum to reach h-file support square. Delay h-pawn breakthrough while preserving blockade tension. Theoretical loss (K vs K+B+2P…
- llm.plan26740ms · $0.0120
full reasoning
Phase: endgame. Maintain h7 blockade via Kg7/Kg6 indefinitely. Force Black King 5–6 moves minimum to reach h-file support square. Delay h-pawn breakthrough while preserving blockade tension. Theoretical loss (K vs K+B+2P). Blockade is White's sole asset. Every move worsens position slightly; strategy is maximum defensive delay and opponent error exploitation. Critical: Blockade break = h7 queens in ~5–7 moves (instant loss); Black King c2 is 5–6 moves from f6/h6 support; currently too far; Bishop d7 controls e6, e8; King must stay tied to h-file. Kg5 accelerates h5 threat worse than Kg7..
6. Candidates Candidates: Kg7 (Maintains blockade on h7; White's sole asset indefinitely prevents breakthrough) | Kh5 (Preserves h7 blockade from flexible position; ties King to defensive duty) | Kxh7 (Removes h-pawn threat; simplifie…
- chess.js.legal_moves0ms
- llm.candidates50817ms · $0.0273
full reasoning
Candidates: Kg7 (Maintains blockade on h7; White's sole asset indefinitely prevents breakthrough) | Kh5 (Preserves h7 blockade from flexible position; ties King to defensive duty) | Kxh7 (Removes h-pawn threat; simplifies position but abandons blockade asset)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kg7 — Maintains blockade via g7. Keeps King close to h8 (blockade square if needed). Follows plan exactly: 'via Kg7/Kg6'. Preserves White's sole asset indefinitely.. Rejected: h6h5, h6h7.
- llm.reflect35250ms · $0.0186
9. Commit Commit Kg7 (h6g7).
110...b3Sonnet
1. Observe Halbzug 110, Schwarz am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 20. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance b4-b3-b2-b1=Q with king on c2 escorting the pawn; bishop covers critical re-entry diagonals to keep White king (h6/g7) far from b1 promotion square. Convert the passed b-pawn to a queen within 3-4…
- llm.plan10983ms · $0.0043
full reasoning
Phase: endgame. Advance b4-b3-b2-b1=Q with king on c2 escorting the pawn; bishop covers critical re-entry diagonals to keep White king (h6/g7) far from b1 promotion square. Convert the passed b-pawn to a queen within 3-4 moves — White king is 6+ tempi away and bishop controls interception diagonals, making this a straightforward technical win. Critical: White king on g7 is far but must be monitored — opposition heuristic (memory hit 3) confirms Black king must stay ahead of or beside the pawn on the b-file to escort it safely; Bishop must cover key re-entry squares (e.g. c6, a6, f5 diagonal) to block White king sprint — bishop on d7 is well-placed but may need repositioning; No White tactical threats — g7-pawn is irrelevant as Black queen after promotion wins trivially; pure technical conversion task.
6. Candidates Candidates: b3 (Advance the passed b-pawn directly; king on c2 escorts it naturally. White king is 6+ tempi away — pure technical win.) | Kb2 (King escorts pawn from beside — opposition heuristic (memory hit 3) confirms …
- chess.js.legal_moves0ms
- llm.candidates8482ms · $0.0038
full reasoning
Candidates: b3 (Advance the passed b-pawn directly; king on c2 escorts it naturally. White king is 6+ tempi away — pure technical win.) | Kb2 (King escorts pawn from beside — opposition heuristic (memory hit 3) confirms king must stay ahead/beside b-pawn for safe promotion.) | Bc6 (Bishop repositions to block White king sprint via c6 interception diagonal, covering re-entry squares as memory heuristic advises.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: b3 — Direct pawn advance is fastest. King on c2 already escorts from beside/ahead (memory heuristic 3). White king on g7 is 6+ tempi away — b3-b2-b1=Q is unstoppable without tempo waste.. Rejected: c2b2, d7c6…
- llm.reflect9362ms · $0.0028
full reasoning
Final pick: b3 — Direct pawn advance is fastest. King on c2 already escorts from beside/ahead (memory heuristic 3). White king on g7 is 6+ tempi away — b3-b2-b1=Q is unstoppable without tempo waste.. Rejected: c2b2, d7c6.
9. Commit Commit b3 (b4b3).
111.Kg8Haiku
1. Observe Halbzug 111, Weiss am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 7. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search12ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Maintain h7 blockade via Kg7/Kg6. Force Black King to travel 5–6 moves from c2 to support h-pawn. Avoid Kg5 (accelerates h5). Preserve blockade tension indefinitely. Static blockade is White's sole asset.…
- llm.plan26721ms · $0.0132
full reasoning
Phase: endgame. Maintain h7 blockade via Kg7/Kg6. Force Black King to travel 5–6 moves from c2 to support h-pawn. Avoid Kg5 (accelerates h5). Preserve blockade tension indefinitely. Static blockade is White's sole asset. Black King must reach f6/h6 to break through. Theoretical loss; strategy is maximum defensive delay and opponent error exploitation. Critical: h-pawn breakthrough if blockade breaks (instant loss); Black King advance from c2 to f6/h6 (5–6 move critical timeline); Kg5 worsens position immediately; Bishop d7 controls escape squares e6, e8.
6. Candidates Candidates: Kxh7 (Eliminates critical passed h-pawn threat. While departing blockade strategy, removes instant breakthrough danger and simplifies defense.) | Kf8 (Maintains h7 blockade from alternate square. Supports blo…
- chess.js.legal_moves0ms
- llm.candidates28348ms · $0.0152
full reasoning
Candidates: Kxh7 (Eliminates critical passed h-pawn threat. While departing blockade strategy, removes instant breakthrough danger and simplifies defense.) | Kf8 (Maintains h7 blockade from alternate square. Supports blockade tension while repositioning King, adhering to strategic defense plan.) | Kg8 (Preserves blockade control along eighth rank. Stays nearby h-pawn. Maintains defensive posture preventing Black King incursion.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kg8 — Preserves blockade commitment and defensive posture. Kg8 maintains primary defensive asset (h7 control) while staying on back rank to prevent Black King incursion toward f6/h6 support zone.. Rejected: g…
- llm.reflect78253ms · $0.0416
full reasoning
Final pick: Kg8 — Preserves blockade commitment and defensive posture. Kg8 maintains primary defensive asset (h7 control) while staying on back rank to prevent Black King incursion toward f6/h6 support zone.. Rejected: g7h7, g7f8.
9. Commit Commit Kg8 (g7g8).
112...b2Sonnet
1. Observe Halbzug 112, Schwarz am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 19. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search17ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance b3→b2→b1=Q with Black king on c2 escorting. Bishop covers interception diagonals to keep White king (g8) away from b1. Promotion in 2-3 moves is forced — White king is 6+ tempi away. Promote the b…
- llm.plan11441ms · $0.0037
full reasoning
Phase: endgame. Advance b3→b2→b1=Q with Black king on c2 escorting. Bishop covers interception diagonals to keep White king (g8) away from b1. Promotion in 2-3 moves is forced — White king is 6+ tempi away. Promote the b-pawn to a queen; bishop and king escort make White king interception impossible given the distance. Critical: White king on g8 is 6 tempi from b1 — cannot intercept promotion; Memory hit 3 (opposition): Black king on c2 is already ahead of pawn, escorting correctly — maintain this; Bishop must stay active on diagonals that block any White king shortcut (e.g. f5-c2, d4-b2 diagonal coverage).
6. Candidates Candidates: b2 (Advance pawn to b2 — promotion in one more move. White king on g8 is 6+ tempi away, cannot intercept.) | Kb1 (King escorts pawn to promotion square directly. Memory hit 3: king ahead of pawn ensures force…
- chess.js.legal_moves0ms
- llm.candidates10417ms · $0.0035
full reasoning
Candidates: b2 (Advance pawn to b2 — promotion in one more move. White king on g8 is 6+ tempi away, cannot intercept.) | Kb1 (King escorts pawn to promotion square directly. Memory hit 3: king ahead of pawn ensures forced promotion.) | Bf5 (Bishop covers key diagonal, blocking White king shortcuts toward b1. Keeps interception impossible per plan.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: b2 — Advances pawn to b2, promotion next move to b1=Q. White king on g8 is 6 tempi away — physically cannot reach b1. King on c2 escorts correctly (memory hit 3: king ahead of pawn).. Rejected: c2b1, d7f5.
- llm.reflect9003ms · $0.0029
9. Commit Commit b2 (b3b2).
113.Kg7Haiku
1. Observe Halbzug 113, Weiss am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 5. Criticality: 0.20.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search19ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Maintain static blockade on h7 via Kg7/Kg6 rotation. Force Black King's 5–6 move journey from c2 toward f6/h6. Avoid Kg5 (catastrophic—accelerates h5 promotion). Hold indefinitely or until Black breaks th…
- llm.plan20241ms · $0.0078
full reasoning
Phase: endgame. Maintain static blockade on h7 via Kg7/Kg6 rotation. Force Black King's 5–6 move journey from c2 toward f6/h6. Avoid Kg5 (catastrophic—accelerates h5 promotion). Hold indefinitely or until Black breaks through. Defend passively against theoretical loss; exploit Black King's long travel time or premature h-pawn advance for practical defensive chances. Critical: h7 pawn breakthrough if blockade breaks (instant loss); Black King advance c2→f6/h6 within ~5–6 moves (critical timeline); Kg5 weakens blockade immediately; Kg7/Kg6 only safe squares; Bishop d7 locks e8 escape; White King has no refuge.
6. Candidates Candidates: Kg7 (Maintains h7 blockade via Kg7/Kg6 rotation, forces Black King's lengthy advance from c2.) | Kh8 (Defensive corner position, prevents h-pawn escape while Black King slowly approaches from c2.) | Kxh7 (Eli…
- chess.js.legal_moves0ms
- llm.candidates22725ms · $0.0121
full reasoning
Candidates: Kg7 (Maintains h7 blockade via Kg7/Kg6 rotation, forces Black King's lengthy advance from c2.) | Kh8 (Defensive corner position, prevents h-pawn escape while Black King slowly approaches from c2.) | Kxh7 (Eliminates promotion threat, simplifies to single b2 pawn, pragmatic tactical option.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kg7 — Maintains h7 blockade indefinitely via Kg7/Kg6 rotation. Forces Black's King on 5-move journey from c2. Avoids catastrophic Kg5.. Rejected: g8h8, g8h7.
- llm.reflect26692ms · $0.0113
9. Commit Commit Kg7 (g8g7).
114...b1=QSonnet
1. Observe Halbzug 114, Schwarz am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 22. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search13ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Promote b2-pawn to queen. Black king on c2 escorts from ahead (memory hit: opposition — king already correctly placed). Bishop controls key diagonals preventing White king shortcut. Promotion on b1 in 1-2…
- llm.plan10379ms · $0.0036
full reasoning
Phase: endgame. Promote b2-pawn to queen. Black king on c2 escorts from ahead (memory hit: opposition — king already correctly placed). Bishop controls key diagonals preventing White king shortcut. Promotion on b1 in 1-2 moves is unstoppable. Convert decisive material advantage (+5) by promoting the b-pawn immediately — White king on g8 is 6+ tempi away and cannot intercept. Critical: White king g8 is 6 tempi from b1 — zero interception threat; Memory hit opposition: Black king c2 is ahead of pawn, maintain escort position; Bishop must stay on diagonal covering any White king approach route (f5-b1 or e4-b1); b2→b1=Q is the only move that matters — do not waste tempo.
6. Candidates Candidates: b1=Q (Promotes pawn to queen immediately — White king on g8 is 6 tempi away, zero interception. Decisive conversion of +5 advantage.) | Bf5 (Controls f5-b1 diagonal, covering promotion square and blocking any…
- chess.js.legal_moves0ms
- llm.candidates9851ms · $0.0038
full reasoning
Candidates: b1=Q (Promotes pawn to queen immediately — White king on g8 is 6 tempi away, zero interception. Decisive conversion of +5 advantage.) | Bf5 (Controls f5-b1 diagonal, covering promotion square and blocking any White king approach route before promoting next move.) | Kc1 (King escorts pawn to promotion square directly — memory heuristic: king ahead of pawn maintains opposition and escort position.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: b1=Q — Immediate promotion with White king 6+ tempi away — zero interception threat. Memory: convert decisive material advantage without delay. b1=Q delivers checkmate threats next move.. Rejected: d7f5, c2c1…
- llm.reflect9392ms · $0.0024
full reasoning
Final pick: b1=Q — Immediate promotion with White king 6+ tempi away — zero interception threat. Memory: convert decisive material advantage without delay. b1=Q delivers checkmate threats next move.. Rejected: d7f5, c2c1.
9. Commit Commit b1=Q (b2b1q).
115.Kg8Haiku
1. Observe Halbzug 115, Weiss am Zug. Phase: Endspiel. Schwarz +13 Punkte. Legale Zuege: 7. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Hold h7 blockade via Kg6/Kg7 rotation. Force Black King's 5–6 move journey c2→f6/h6 (slow advance). Survive tactical checks; exploit delay for practical defense. Static blockade h7 indefinitely. King osci…
- llm.plan29445ms · $0.0136
full reasoning
Phase: endgame. Hold h7 blockade via Kg6/Kg7 rotation. Force Black King's 5–6 move journey c2→f6/h6 (slow advance). Survive tactical checks; exploit delay for practical defense. Static blockade h7 indefinitely. King oscillates Kg7/Kg6 only. If blockade fails, pawn promotes instantly (loss). Theoretical loss; survival depends on avoiding Kg5 and mating nets. Critical: h7 promotion instant loss if blockade breaks; Black King c2→f6 in ~5–6 moves (critical timeline); Kg5 weakens blockade fatally—allows h5-h6 push; Queen mating threats limit King squares severely; Bishop d7 locked in blockade; zero counterplay.
6. Candidates Candidates: Kh6 (Blockade h6 directly, prevent h7 pawn advance, maintain static defense indefinitely.) | Kxh7 (Remove pawn promotion threat immediately, simplify to Q+B vs King endgame.) | Kg8 (Retreat along g-file, main…
- chess.js.legal_moves0ms
- llm.candidates97417ms · $0.0505
full reasoning
Candidates: Kh6 (Blockade h6 directly, prevent h7 pawn advance, maintain static defense indefinitely.) | Kxh7 (Remove pawn promotion threat immediately, simplify to Q+B vs King endgame.) | Kg8 (Retreat along g-file, maintain h7 control, stay near blockade region.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kg8 — Maintains critical h8 blockade indefinitely. Kg8 controls h8 (promotion square), preventing h7-h8. Plan requires static blockade survival.. Rejected: g7h6, g7h7.
- llm.reflect32249ms · $0.0159
9. Commit Commit Kg8 (g7g8).
116...Qg1+Sonnet
1. Observe Halbzug 116, Schwarz am Zug. Phase: Endspiel. Schwarz +13 Punkte. Legale Zuege: 33. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Promote the b1-queen or use existing queen+bishop+king to deliver checkmate against the lone White king on g8. With queen already on b1 and bishop on d7, coordinate mating net closing in on g8. Tighten th…
- llm.plan10871ms · $0.0036
full reasoning
Phase: endgame. Promote the b1-queen or use existing queen+bishop+king to deliver checkmate against the lone White king on g8. With queen already on b1 and bishop on d7, coordinate mating net closing in on g8. Tighten the mating net around the White king on g8 using queen and bishop coordination, forcing checkmate within a few moves. Critical: White king is trapped on g8 with limited escape squares — g7, h8, f8 accessible but constrainable; Memory hit opposition: Black king on c2 should advance toward the mating zone to assist; No White counterplay — lone king cannot generate threats; Bishop on d7 covers key diagonals; queen on b1 has full board range — coordinate to cut off king escape routes before delivering mate.
6. Candidates Candidates: Qg1+ (Drives White king to h8, tightening mating net. Queen cuts g-file, bishop on d7 covers escape diagonals.) | Qb8+ (Check from b8 forces king to h7 or f7, king safety principle: constrain before mating.) …
- chess.js.legal_moves0ms
- llm.candidates12944ms · $0.0036
full reasoning
Candidates: Qg1+ (Drives White king to h8, tightening mating net. Queen cuts g-file, bishop on d7 covers escape diagonals.) | Qb8+ (Check from b8 forces king to h7 or f7, king safety principle: constrain before mating.) | Be6+ (Bishop check improves worst piece placement, activates diagonal coverage around g8 king zone.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qg1+ — Drives king to h8 (forced), then Qg7# or Qh2# with bishop on d7 covering f5-a8 diagonal. Tightest mating net — king cornered on h8 with no escape.. Rejected: b1b8, d7e6.
- llm.reflect8592ms · $0.0028
9. Commit Commit Qg1+ (b1g1).
117.Kxh7Haiku
1. Observe Halbzug 117, Weiss am Zug. Phase: Endspiel. Schwarz +13 Punkte. Legale Zuege: 4. Schach! Criticality: 0.45. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search17ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search10ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Maintain h7 blockade via Kg7/Kg6 oscillation. Evade Queen checks without losing blockade. Force Black King's 5-6 move advance from c2. Fortress h7 blockade indefinitely. Black King reaches critical zone i…
- llm.plan72727ms · $0.0454
full reasoning
Phase: endgame. Maintain h7 blockade via Kg7/Kg6 oscillation. Evade Queen checks without losing blockade. Force Black King's 5-6 move advance from c2. Fortress h7 blockade indefinitely. Black King reaches critical zone in 5-6 moves; Queen checks manageable via careful King movement. Critical: h7 pawn = instant loss if blockade breaks (must maintain King defense); Black King c2 reaches f6/h6 in ~5-6 moves (critical attacking timeline); Bishop d7 controls g6/h6 access (restricts King to g7/h8/g8 mainly); Kg5 is fatal: allows h5-h6 push with eventual pawn support; Queen checks from g1 manageable by oscillating Kg7/Kg6 axis.
6. Candidates Candidates: Kxh7 (Eliminates critical h7 pawn threat through capture, achieving blockade objective decisively.) | Kh8 (Maintains h7 blockade from h8, preserving fortress while enabling oscillation to evade queen checks.)…
- chess.js.legal_moves0ms
- llm.candidates43926ms · $0.0242
full reasoning
Candidates: Kxh7 (Eliminates critical h7 pawn threat through capture, achieving blockade objective decisively.) | Kh8 (Maintains h7 blockade from h8, preserving fortress while enabling oscillation to evade queen checks.) | Kf7 (Activates king toward black king on c2, though abandons h7 control risking pawn promotion.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxh7 — Capture eliminates Black's primary winning asset—the dangerous h7 pawn. Forces endgame into K+Q+B vs K where Black's victory is not guaranteed; perpetual threat neutralized decisively.. Rejected: g8h8,…
- llm.reflect55783ms · $0.0255
full reasoning
Final pick: Kxh7 — Capture eliminates Black's primary winning asset—the dangerous h7 pawn. Forces endgame into K+Q+B vs K where Black's victory is not guaranteed; perpetual threat neutralized decisively.. Rejected: g8h8, g8f7.
9. Commit Commit Kxh7 (g8h7).
118...Qg7+Sonnet
1. Observe Halbzug 118, Schwarz am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 38. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Deliver checkmate to the lone White king on h7 using queen and bishop. King is already cut off — tighten the mating net by advancing queen to eliminate escape squares on g8/f8/h8 while bishop controls key…
- llm.plan12444ms · $0.0041
full reasoning
Phase: endgame. Deliver checkmate to the lone White king on h7 using queen and bishop. King is already cut off — tighten the mating net by advancing queen to eliminate escape squares on g8/f8/h8 while bishop controls key diagonals. Force checkmate in 1-3 moves by coordinating queen and bishop to cover all White king escape squares, with Black king providing backup if needed. Critical: White king on h7 has limited squares: g8, g6, h8, h6 — queen must cover these systematically; Memory heuristic ENDGAME opposition noted but king opposition not primary here — queen+bishop sufficiency is the mechanism; Memory heuristic ENDGAME philidor irrelevant (no rooks) — closest applicable pattern is queen mating net closure; bishop on d7 covers e8/c6 diagonal; No White counterplay possible — lone king cannot generate threats; 38 legal moves means no zugzwang risk — choose the most forcing line.
6. Candidates Candidates: Qg7+ (Forces king to h8, tightening mating net; queen controls g8/g6, bishop on d7 covers e8.) | Qg8+ (Drives king to h6, queen covers g7/g8; bishop can then deliver checkmate from diagonal.) | Bf5+ (Check fo…
- chess.js.legal_moves0ms
- llm.candidates9380ms · $0.0036
full reasoning
Candidates: Qg7+ (Forces king to h8, tightening mating net; queen controls g8/g6, bishop on d7 covers e8.) | Qg8+ (Drives king to h6, queen covers g7/g8; bishop can then deliver checkmate from diagonal.) | Bf5+ (Check forces king to move; bishop activates on f5 diagonal, coordinating with queen for mating net closure.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qg7+ — Forces Kh8, then Bd7 covers e8 while queen controls g7/g8/h7 — checkmate follows immediately with Qg8#. Clean forced mate in 2 with no escape squares.. Rejected: g1g8, d7f5.
- llm.reflect13382ms · $0.0029
9. Commit Commit Qg7+ (g1g7).
119.Kxg7Haiku
1. Observe Halbzug 119, Weiss am Zug. Phase: Endspiel. Schwarz +12 Punkte. Legale Zuege: 1. Schach! Criticality: 0.45. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search14ms
3. Recall Opponent No pattern found for chess-sonnet-tm (tag=chess-sonnet-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Play Kxg7. This is the only legal move available. It captures Black's undefended Queen, transforming a materially lost position into a K+B endgame where White has reasonable drawing chances or even winnin…
- llm.plan39745ms · $0.0210
full reasoning
Phase: endgame. Play Kxg7. This is the only legal move available. It captures Black's undefended Queen, transforming a materially lost position into a K+B endgame where White has reasonable drawing chances or even winning prospects. Eliminate Black's dominant Queen piece, then navigate the resulting King-Bishop endgame with careful King maneuvers to achieve at least a draw through fortress defense or perpetual check opportunities. Critical: Kxg7 is the sole legal move (Kh8 and Kg6 both controlled by Queen); Black Bishop on d7 cannot defend g7 (dark-squared vs light-squared Bishop); Captures undefended Queen, decisive material swing; After capture, King-Bishop endgame is drawable with correct play.
6. Candidates Candidates: Kxg7 (Only legal move. Captures undefended Queen, transforming lost position to drawable K+B endgame.)
- chess.js.legal_moves0ms
- llm.candidates12370ms · $0.0035
7. Verify Alle 1 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxg7 — Only legal move. Captures undefended Queen, transforming lost position to drawable K+B endgame.. Rejected: —.
9. Commit Commit Kxg7 (h7g7).
PGN
PGN anzeigen
[Event "Tournament Pairing 1"] [Site "?"] [Date "2026-05-30"] [Round "?"] [White "chess-haiku-tm"] [Black "chess-sonnet-tm"] [Result "*"] 1. e4 e5 2. Nf3 Nf6 3. d4 Bc5 4. Bc4 O-O 5. Bxf7+ Rxf7 6. Nxe5 Bb4+ 7. Nc3 Bxc3+ 8. bxc3 Nd5 9. Nxf7 Kxf7 10. Qf3+ Nf6 11. Qxf6+ Qxf6 12. Bg5 Qxg5 13. O-O Ke8 14. Rfe1 Kf8 15. Re3 Qxe3 16. fxe3 Kg8 17. d5 Nc6 18. d6 cxd6 19. e5 Nxe5 20. e4 d5 21. exd5 Nf3+ 22. gxf3 Kf7 23. d6 Ke6 24. Re1+ Kxd6 25. Re6+ dxe6 26. c4 Kc5 27. a4 b5 28. axb5 Kxc4 29. b6 axb6 30. c3 Kb5 31. c4+ Kxc4 32. h4 Bd7 33. h5 Kd5 34. h6 Ra1+ 35. Kg2 gxh6 36. f4 Ra7 37. f5 exf5 38. Kf3 Kd4 39. Kf4 Kd3 40. Ke5 f4 41. Kd5 Ke3 42. Ke5 Ra5+ 43. Kd6 Rd5+ 44. Kxd5 f3 45. Ke5 f2 46. Kf6 f1=Q+ 47. Kg7 Qf8+ 48. Kxf8 Kd4 49. Kg7 Be6 50. Kh8 Kc3 51. Kg7 b5 52. Kxh6 Bd7 53. Kg7 Kc2 54. Kh6 b4 55. Kg7 b3 56. Kg8 b2 57. Kg7 b1=Q 58. Kg8 Qg1+ 59. Kxh7 Qg7+ 60. Kxg7 *