SonnetvsHaiku
Halbzuege (83)
1.e4Sonnet
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_search8ms
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. Seize central space immediately with a pawn to e4 or d4, then follow the 'knights before bishops' heuristic: Nf3 on move 2, Nc3 or Bc4/Bb5 on moves 3-4, castle kingside by move 5-6. Create multiple develo…
- llm.plan18844ms · $0.0093
full reasoning
Phase: opening. Seize central space immediately with a pawn to e4 or d4, then follow the 'knights before bishops' heuristic: Nf3 on move 2, Nc3 or Bc4/Bb5 on moves 3-4, castle kingside by move 5-6. Create multiple development options before committing the bishops. Establish a strong central pawn presence (e4 + d4 ideal, or e4 + Nf3 + d3 if opponent contests), develop all minor pieces to active squares, castle early for king safety, then launch active piece play from a superior positional foundation. Critical: No opponent threats yet — this is pure initiative, tempo belongs entirely to White; Heuristic 'central control': e4 immediately claims e4/d5 influence and opens the f1-bishop diagonal — failing to occupy the center on move 1 cedes the initiative structurally; Heuristic 'knights before bishops': the plan must reserve flexibility for bishop placement; committing the bishop diagonal before knowing opponent's setup wastes options; Avoid early queen development (heuristic 3) — dame stays home until minor pieces are out.
6. Candidates Candidates: e4 (Seizes central e4/d5 influence immediately, opens f1-bishop diagonal — maximum initiative on move 1.) | d4 (Controls d4/e5, enables Nf3+c4 Queen's Gambit setups — strong central presence with flexibility.…
- chess.js.legal_moves0ms
- llm.candidates9441ms · $0.0036
full reasoning
Candidates: e4 (Seizes central e4/d5 influence immediately, opens f1-bishop diagonal — maximum initiative on move 1.) | d4 (Controls d4/e5, enables Nf3+c4 Queen's Gambit setups — strong central presence with flexibility.) | Nf3 (Knights before bishops heuristic: develops actively, controls e5/d4, keeps all pawn options open.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e4 — Immediately claims e4/d5 central influence and opens the f1-bishop diagonal, giving maximum initiative. The 'central control' heuristic demands this over delay — tempo on move 1 is structurally decisive.…
- llm.reflect8845ms · $0.0029
full reasoning
Final pick: e4 — Immediately claims e4/d5 central influence and opens the f1-bishop diagonal, giving maximum initiative. The 'central control' heuristic demands this over delay — tempo on move 1 is structurally decisive.. Rejected: d2d4, g1f3.
9. Commit Commit e4 (e2e4).
2...d5Haiku
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_search7ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search6ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Counter White's central e4 with a principled central response (d5, c5, or e5), develop knights to f6/c6 in the next 3-4 moves, and neutralize White's space advantage. Achieve balanced central control and …
- llm.plan21409ms · $0.0081
full reasoning
Phase: opening. Counter White's central e4 with a principled central response (d5, c5, or e5), develop knights to f6/c6 in the next 3-4 moves, and neutralize White's space advantage. Achieve balanced central control and complete minor-piece development by move 6-7 while maintaining a solid pawn structure. Critical: White's e4 controls key central squares d5 and f5 — must challenge immediately with d5 or c5; Own development lag — Black cannot afford passive moves or slow responses; No immediate tactical threats, but sluggish opening allows White to entrench center advantage.
6. Candidates Candidates: d5 (Direct central challenge; contests e4 immediately; forces White concrete decisions.) | e5 (Classical symmetrical center; maintains balance; opens Italian and Ruy Lopez systems.) | Nc6 (Develops knight; su…
- chess.js.legal_moves0ms
- llm.candidates54291ms · $0.0319
full reasoning
Candidates: d5 (Direct central challenge; contests e4 immediately; forces White concrete decisions.) | e5 (Classical symmetrical center; maintains balance; opens Italian and Ruy Lopez systems.) | Nc6 (Develops knight; supports d5 plans; maintains flexibility for next move.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d5 — Direct central challenge forces White's hand immediately. Opens tactical possibilities. Adheres to plan: challenge e4 now, don't wait passively.. Rejected: e7e5, b8c6.
- llm.reflect24198ms · $0.0122
9. Commit Commit d5 (d7d5).
3.exd5Sonnet
1. Observe Halbzug 3, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 31. 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_search10ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Resolve the d5/e4 central tension immediately. If exd5 follows, Black's most natural recapture is Qxd5 (Scandinavian main line), putting the queen out early — violating the 'OPENING queen late' heuristic.…
- llm.plan36302ms · $0.0252
full reasoning
Phase: opening. Resolve the d5/e4 central tension immediately. If exd5 follows, Black's most natural recapture is Qxd5 (Scandinavian main line), putting the queen out early — violating the 'OPENING queen late' heuristic. White then plays Nc3 attacking the queen, gaining a free development tempo, followed by d4 to re-establish full center control, Nf3, and rapid castling. Exploit Black's premature queen sortie (if Qxd5) to achieve clear development superiority, dominate e4+d4 per the 'OPENING central control' heuristic, and convert that lead into middlegame pressure from active, well-coordinated pieces. Critical: Black's d5 pawn directly attacks e4 — tension must be resolved this move, no deferral possible; Anticipated Qxd5 is positionally risky for Black (queen-late heuristic) — Nc3 reply gains tempo for free; Memory: OPENING central control — after exd5 Qxd5 Nc3, White must follow with d4 to reclaim full d4/e4 center, not let Black equalize with ...e5 or ...c6.
6. Candidates Candidates: exd5 (Resolves central tension immediately; forces Qxd5, exploiting OPENING queen-late heuristic — Nc3 then gains free tempo.) | Nc3 (Active development supports e4 and contests d5 indirectly; fits OPENING ce…
- chess.js.legal_moves0ms
- llm.candidates31741ms · $0.0251
full reasoning
Candidates: exd5 (Resolves central tension immediately; forces Qxd5, exploiting OPENING queen-late heuristic — Nc3 then gains free tempo.) | Nc3 (Active development supports e4 and contests d5 indirectly; fits OPENING central control heuristic without pawn commitment.) | Bb5+ (Active piece play per Generation 0 directive; check creates multiple threats, disrupts Black's coordination immediately.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: exd5 — Captures central pawn forcing Qxd5 (queen-late heuristic violation); Nc3 then attacks queen for free tempo while White re-establishes d4+e4 center — active piece coordination per Gen 0 directive.. Reje…
- llm.reflect35861ms · $0.0271
full reasoning
Final pick: exd5 — Captures central pawn forcing Qxd5 (queen-late heuristic violation); Nc3 then attacks queen for free tempo while White re-establishes d4+e4 center — active piece coordination per Gen 0 directive.. Rejected: b1c3, f1b5.
9. Commit Commit exd5 (e4d5).
4...Nf6Haiku
1. Observe Halbzug 4, Schwarz am Zug. Phase: Eroeffnung. Weiss +1 Punkte. Legale Zuege: 28. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search4ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Recover the d5 pawn immediately (via Qxd5 or c6 defense), develop knights to f6 and c6 within next 3 moves, neutralize White's center control, and establish balanced piece coordination by move 6-7. Conver…
- llm.plan57259ms · $0.0304
full reasoning
Phase: opening. Recover the d5 pawn immediately (via Qxd5 or c6 defense), develop knights to f6 and c6 within next 3 moves, neutralize White's center control, and establish balanced piece coordination by move 6-7. Convert temporary material deficit into equal middle-game position by rapid piece development and central pressure, preventing White from entrenching the d5 pawn advantage. Critical: White's advanced d5 pawn limits Black's central options (c5, e5) and controls key squares; Black must develop quickly to counter White's space advantage before White launches a kingside attack (f4-f5 is a tactical threat); Queen placement after d5 pawn recovery determines piece mobility and resistance to early tactics.
6. Candidates Candidates: Qxd5 (Recover advanced d5 pawn immediately. Centralizes queen, forces White's response. Tactical hit.) | Nf6 (Develop with tempo on d5. Forces White's defense, gains time. Natural, strong.) | c6 (Flexible cen…
- chess.js.legal_moves0ms
- llm.candidates59383ms · $0.0321
full reasoning
Candidates: Qxd5 (Recover advanced d5 pawn immediately. Centralizes queen, forces White's response. Tactical hit.) | Nf6 (Develop with tempo on d5. Forces White's defense, gains time. Natural, strong.) | c6 (Flexible center defense supporting d5. Prepares Nf6, Nd7, e5 in any order.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf6 — Develops with tempo on d5, forces White's defense immediately. Black recovers pawn control within 2–3 moves while activating pieces. Fastest path to equilibrium.. Rejected: d8d5, c7c6.
- llm.reflect18269ms · $0.0064
9. Commit Commit Nf6 (g8f6).
5.d4Sonnet
1. Observe Halbzug 5, Weiss am Zug. Phase: Eroeffnung. Weiss +1 Punkte. Legale Zuege: 30. Criticality: 0.30.
- 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 research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Prevent Black from comfortably recovering the d5 pawn by expanding the center immediately. Support d5 via pawn thrust to d4 (OPENING central control heuristic), then mobilize Nf3 (knights before bishops h…
- llm.plan75772ms · $0.0572
full reasoning
Phase: opening. Prevent Black from comfortably recovering the d5 pawn by expanding the center immediately. Support d5 via pawn thrust to d4 (OPENING central control heuristic), then mobilize Nf3 (knights before bishops heuristic), Bc4 or Bb5+, and castle kingside by move 6–7. Black's knight on f6 can immediately capture on d5 — this tempo pressure forces White to act now rather than drift into passive defense. Maintain the extra pawn on d5 as a spatial wedge anchoring a broad two-pawn center; use the space advantage to restrict Black's piece activity while converting a 1-pawn lead into a stable middlegame edge before Black equalizes via queenside expansion. Critical: Black threatens immediate Nxd5 pawn recovery — the d5 pawn has no support yet; After Nf3, a Bg4 pin would pressure the center and challenge White's control over d5; White's entire queenside (Nb1, Bc1, Ra1) is undeveloped — every Black tempo gained on the d5 pawn tightens this lag.
6. Candidates Candidates: d4 (Builds d4–d5 pawn center per opening central control heuristic; anchors the d5 wedge and clamps Black's piece activity.) | Nf3 (Knights before bishops heuristic; develops king-side, prepares castling, and…
- chess.js.legal_moves0ms
- llm.candidates48814ms · $0.0381
full reasoning
Candidates: d4 (Builds d4–d5 pawn center per opening central control heuristic; anchors the d5 wedge and clamps Black's piece activity.) | Nf3 (Knights before bishops heuristic; develops king-side, prepares castling, and pre-empts a …Bg4 pin that would pressure the d5 defender.) | Bb5+ (Active piece play per Gen-0 directive; check costs Black a tempo, delays …Nxd5 recovery, and creates multiple response-forcing threats.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d4 — Builds a d4+d5 two-pawn center per opening central control heuristic; after inevitable Nxd5 White immediately plays c4, kicking the knight and retaining lasting spatial dominance — a concrete structural …
- llm.reflect82986ms · $0.0662
full reasoning
Final pick: d4 — Builds a d4+d5 two-pawn center per opening central control heuristic; after inevitable Nxd5 White immediately plays c4, kicking the knight and retaining lasting spatial dominance — a concrete structural gain within three moves.. Rejected: g1f3, f1b5.
9. Commit Commit d4 (d2d4).
6...e5Haiku
1. Observe Halbzug 6, Schwarz am Zug. Phase: Eroeffnung. Weiss +1 Punkte. Legale Zuege: 31. 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-tmd (tag=chess-sonnet-tmd) — 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 Nc6 to pressure d5 pawn, prepare c5 or e6-e5 central strikes, castle kingside, and establish balanced piece coordination within 3 moves to challenge White's center. Transform temporary material de…
- llm.plan39279ms · $0.0199
full reasoning
Phase: opening. Develop Nc6 to pressure d5 pawn, prepare c5 or e6-e5 central strikes, castle kingside, and establish balanced piece coordination within 3 moves to challenge White's center. Transform temporary material deficit into equal middle-game through rapid piece development (Nc6, Bf5/Be6, O-O) and central counterplay that forces White to defend or abandon the d5 pawn. Critical: White's d5 pawn controls center; Black must challenge with Nc6-c5 or e6-e5; Black's Nf6 is placed but Nc6 is essential next move to exert pressure; f4-f5 kingside attack is White's primary threat; Black must castle to defend; Rapid piece coordination (Nc6, Bf5/Be6, O-O) regains initiative by move 6-7; Queen stays back until move 7+ to avoid tempo loss from early harassment.
6. Candidates Candidates: Nc6 (Essential per plan: develops with tempo, attacks d5, initiates central counterplay) | e5 (Executes plan's e-file strike, attacks d4, forces White to defend center) | Nxd5 (Aggressively captures d5 pawn, …
- chess.js.legal_moves0ms
- llm.candidates69261ms · $0.0404
full reasoning
Candidates: Nc6 (Essential per plan: develops with tempo, attacks d5, initiates central counterplay) | e5 (Executes plan's e-file strike, attacks d4, forces White to defend center) | Nxd5 (Aggressively captures d5 pawn, centralizes knight, transforms material balance decisively)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e5 — Attacks undefended d4 pawn, forces dxe5 or defense, gains central space immediately. Tactical strike opening f-file and kingside lines.. Rejected: b8c6, f6d5.
- llm.reflect50801ms · $0.0277
9. Commit Commit e5 (e7e5).
7.dxe6Sonnet
1. Observe Halbzug 7, Weiss am Zug. Phase: Eroeffnung. Weiss +1 Punkte. Legale Zuege: 39. Criticality: 0.40.
- 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 research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. The en passant capture on e6 (dxe6) must be evaluated as the critical candidate — it implants a monster passed pawn deep in Black's camp, attacking f7 and d7 simultaneously. Following capture, develop Nc3…
- llm.plan75750ms · $0.0604
full reasoning
Phase: opening. The en passant capture on e6 (dxe6) must be evaluated as the critical candidate — it implants a monster passed pawn deep in Black's camp, attacking f7 and d7 simultaneously. Following capture, develop Nc3 and Nf3 immediately to support the d4-e6 pawn duo and prepare castling kingside by move 6–7. Leverage the OPENING central control heuristic: a pawn on e6 — if captured en passant — creates a spatial stranglehold that permanently cramps Black's queenside and king-side development, converting the +1 material lead into a technically winning structure. Critical: en passant on e6 is a one-time opportunity — expires this ply if ignored; Black's Nf6 threatens Ne4 centralization after any non-dxe6 reply, gaining tempo; OPENING knights before bishops rule demands Nf3 and Nc3 this and next turn — all White minor pieces still on rank 1; e6 pawn post-capture attacks both f7 and d7, forcing Black into passive defense rather than development.
6. Candidates Candidates: dxe6 (En passant creates passed pawn on e6 attacking f7+d7 simultaneously; one-time opportunity, cramps Black's development permanently.) | Nc3 (Develops knight controlling d5+e4; follows opening heuristic of…
- chess.js.legal_moves0ms
- llm.candidates9397ms · $0.0038
full reasoning
Candidates: dxe6 (En passant creates passed pawn on e6 attacking f7+d7 simultaneously; one-time opportunity, cramps Black's development permanently.) | Nc3 (Develops knight controlling d5+e4; follows opening heuristic of knights before bishops, supports central pawn duo.) | Nf3 (Develops kingside knight, contests e5 square, prepares castling; directly answers Black's Nf6 centralization threat on e4.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: dxe6 — En passant is a one-time opportunity expiring this ply. The e6 pawn attacks f7 and d7 simultaneously, forcing Black into passive defense and permanently cramping queenside development while White maint…
- llm.reflect11034ms · $0.0028
full reasoning
Final pick: dxe6 — En passant is a one-time opportunity expiring this ply. The e6 pawn attacks f7 and d7 simultaneously, forcing Black into passive defense and permanently cramping queenside development while White maintains material parity with a structural advantage.. Rejected: b1c3, g1f3.
9. Commit Commit dxe6 (d5e6).
8...Qxd4Haiku
1. Observe Halbzug 8, Schwarz am Zug. Phase: Eroeffnung. Weiss +2 Punkte. Legale Zuege: 34. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search18ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search6ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Develop Nc6 to pressure d4 and blockade/attack e6. Prepare central break c5 or e5 to challenge White's pawn grip. Castle kingside quickly. Regain parity or establish sufficient piece activity within 3 mov…
- llm.plan30236ms · $0.0149
full reasoning
Phase: opening. Develop Nc6 to pressure d4 and blockade/attack e6. Prepare central break c5 or e5 to challenge White's pawn grip. Castle kingside quickly. Regain parity or establish sufficient piece activity within 3 moves. Neutralize White's e6 pawn (advanced but isolated) via Nc6 and central pushes. Coordinate piece activity (especially Nc6, Bf5/Be6, castling) to offset material deficit. Transition to middlegame where piece coordination and e6-pawn pressure restore balance. Critical: e6 pawn is White's asset but blockadeable via Nc6; undefended long-term; White threatens f4-f5 to attack Nf6 and open kingside; Black must develop tempo; Nc6 is essential—unlocks Black's coordination and pressures center; Black's d7/e7 gaps are structural weaknesses; regain d7 or push e5 to stabilize.
6. Candidates Candidates: Nc6 (Pressure d4, blockade e6, unlock coordination. Cornerstone of tactical plan.) | Qxd4 (Win d4 pawn, regain material now, queen active. Tactical strike.) | c5 (Central break, challenge d4, support knight d…
- chess.js.legal_moves0ms
- llm.candidates52229ms · $0.0303
full reasoning
Candidates: Nc6 (Pressure d4, blockade e6, unlock coordination. Cornerstone of tactical plan.) | Qxd4 (Win d4 pawn, regain material now, queen active. Tactical strike.) | c5 (Central break, challenge d4, support knight development. Gains space and tempo.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qxd4 — Captures undefended d4 pawn, forces queen trade (Qxd4), regains material immediately. Simplifies position, restores parity.. Rejected: b8c6, c7c5.
- llm.reflect41278ms · $0.0244
9. Commit Commit Qxd4 (d8d4).
9.Qxd4Sonnet
1. Observe Halbzug 9, Weiss am Zug. Phase: Eroeffnung. Weiss +1 Punkte. Legale Zuege: 38. Criticality: 0.40.
- 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_search6ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Play Nf3 immediately to attack the d4 queen and drive it back — referencing the OPENING knights-before-bishops heuristic — then follow with Nc3 and Be2 to crash toward kingside castling within two moves. …
- llm.plan46783ms · $0.0343
full reasoning
Phase: opening. Play Nf3 immediately to attack the d4 queen and drive it back — referencing the OPENING knights-before-bishops heuristic — then follow with Nc3 and Be2 to crash toward kingside castling within two moves. The OPENING queen-late heuristic confirms Black paid a price for the early Qd4 sortie: we should exploit it with tempo-gaining development. Survive the early queen aggression by driving Black's queen back with Nf3, complete rapid development (Nc3, Be2, O-O), and then leverage the e6 pawn as a permanent positional weapon to restrict Black's king and disrupt coordination between Black's rooks. Critical: Qxf2+ threat — Black queen on d4 threatens immediate check on f2, winning material if White wastes a move; White's complete underdevelopment — all pieces on rank 1, castling is 3 moves away minimum; e6 pawn is both a strength and a liability until White's king is safe — it cannot be used offensively while the king is exposed; Black knight on f6 is well-placed and supports future queen retreats or aggressive jumps.
6. Candidates Candidates: Qxd4 (Black queen on d4 is completely unprotected; captures a queen for free, game-deciding material gain. OPENING queen-late heuristic: Black's premature queen sortie is punished immediately.) | exf7+ (Wins …
- chess.js.legal_moves0ms
- llm.candidates116114ms · $0.0980
full reasoning
Candidates: Qxd4 (Black queen on d4 is completely unprotected; captures a queen for free, game-deciding material gain. OPENING queen-late heuristic: Black's premature queen sortie is punished immediately.) | exf7+ (Wins pawn with check, strips Black's king of castling rights, then Qxd4 follows. Exploits OPENING queen-late weakness: Black queen on d4 cannot defend f7.) | Nf3 (Per plan and OPENING knights-before-bishops heuristic: defends f2 against Qxf2+ while attacking the exposed d4 queen, gaining tempo in development.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qxd4 — Black queen on d4 is completely unprotected; captures a queen for free, game-deciding material gain. OPENING queen-late heuristic: Black's premature queen sortie is punished immediately.. Rejected: e6f…
full reasoning
Final pick: Qxd4 — Black queen on d4 is completely unprotected; captures a queen for free, game-deciding material gain. OPENING queen-late heuristic: Black's premature queen sortie is punished immediately.. Rejected: e6f7, g1f3. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Qxd4 (d1d4).
10...Nc6Haiku
1. Observe Halbzug 10, Schwarz am Zug. Phase: Eroeffnung. Weiss +10 Punkte. Legale Zuege: 29. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search15ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search6ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Develop Nc6 to attack e6 and pressure d4. Push c5 or e5 for central counterplay. Castle kingside within 2 moves. Generate active piece play within 3 moves. Blockade e6 pawn via Nc6 and central breaks. Act…
- llm.plan40752ms · $0.0217
full reasoning
Phase: opening. Develop Nc6 to attack e6 and pressure d4. Push c5 or e5 for central counterplay. Castle kingside within 2 moves. Generate active piece play within 3 moves. Blockade e6 pawn via Nc6 and central breaks. Activate remaining pieces (Be6, Bf5) with tempo. Castle kingside. Transition to middlegame with coordinated piece activity offsetting White's spatial advantage. Critical: e6 pawn is isolated but advanced; must be pressured by Nc6 or softened by c5/e5 breaks; White's Qd4 is centralized but vulnerable to Nc6 fork threats and tempo attacks; Black's king safety is urgent; White threatens f4–f5 attacking Nf6. Must castle or prepare e5 to block before White consolidates.
6. Candidates Candidates: Nc6 (Core strategic move: develops knight with tempo, attacks both e6 and d4 queen. Blockades pawn, forces queen move, improves coordination.) | Bb4+ (Forcing check with tempo, activates dark-squared bishop i…
- chess.js.legal_moves0ms
- llm.candidates33214ms · $0.0181
full reasoning
Candidates: Nc6 (Core strategic move: develops knight with tempo, attacks both e6 and d4 queen. Blockades pawn, forces queen move, improves coordination.) | Bb4+ (Forcing check with tempo, activates dark-squared bishop immediately. Generates active piece play while White responds, gains time and initiative.) | Bxe6 (Removes dangerous advanced e6 pawn with light-squared bishop. Eliminates White's main threat, simplifies position, reduces spatial advantage.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nc6 — Develops with tempo, attacking both e6 pawn and d4 queen simultaneously. Forces queen relocation, blockades the threat, improves piece coordination, enables kingside castling next move.. Rejected: f8b4,…
- llm.reflect32269ms · $0.0141
full reasoning
Final pick: Nc6 — Develops with tempo, attacking both e6 pawn and d4 queen simultaneously. Forces queen relocation, blockades the threat, improves piece coordination, enables kingside castling next move.. Rejected: f8b4, c8e6.
9. Commit Commit Nc6 (b8c6).
11.Nf3Sonnet
1. Observe Halbzug 11, Weiss am Zug. Phase: Eroeffnung. Weiss +10 Punkte. Legale Zuege: 54. Criticality: 0.25.
- 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 research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Develop Nf3 immediately — the OPENING knights-before-bishops heuristic confirms this is the highest-tempo move — then Nc3 and Be2 to reach kingside castling within two moves. Keep the e6 pawn as an untouc…
- llm.plan62845ms · $0.0463
full reasoning
Phase: opening. Develop Nf3 immediately — the OPENING knights-before-bishops heuristic confirms this is the highest-tempo move — then Nc3 and Be2 to reach kingside castling within two moves. Keep the e6 pawn as an untouchable positional anchor splitting Black's position in two halves. Convert the massive material surplus (+10, effectively up a queen) by completing development at speed, castling kingside for king safety, and then exploiting the e6 pawn plus centralized Qd4 to keep Black's king permanently exposed in the center until a decisive coordination blow lands. Critical: Black's two active knights on c6 and f6 are the only real counterplay sources — Nf3 develops AND limits their scope; e6 pawn is a permanent space-gaining wedge but currently unsupported — prioritize development over pawn defense; Black's king on e8 cannot castle kingside safely while e6 and Qd4 threaten the f7-square and d7 entry square — maintain this structural pressure.
6. Candidates Candidates: Nf3 (Knights-before-bishops heuristic: develops kingside, limits Black Nf6 scope, opens path to Be2 + 0-0 in two moves.) | exf7+ (Active piece play with controlled risk: forces king to f7 or e7, permanently d…
- chess.js.legal_moves0ms
- llm.candidates48373ms · $0.0343
full reasoning
Candidates: Nf3 (Knights-before-bishops heuristic: develops kingside, limits Black Nf6 scope, opens path to Be2 + 0-0 in two moves.) | exf7+ (Active piece play with controlled risk: forces king to f7 or e7, permanently denying Black kingside castling and creating f8-promotion threat.) | Nc3 (Second development knight; controls d5/e4, coordinates with Qd4 pressure on Black's e8-king and supports future attack on exposed Black king.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf3 — Knights-before-bishops heuristic: develops kingside, limits Black Nf6 scope, opens path to Be2 + 0-0 in two moves.. Rejected: e6f7, b1c3. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Nf3 (g1f3).
12...Nxd4Haiku
1. Observe Halbzug 12, Schwarz am Zug. Phase: Eroeffnung. Weiss +10 Punkte. Legale Zuege: 32. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search6ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Castle kingside (urgent). Blockade e6 with Nc6, probe with c5 or e5 break. Develop Bf5 or Be6 with tempo. Neutralize White's spatial grip within 3 moves. Transition to middlegame with castled king, active…
- llm.plan23209ms · $0.0088
full reasoning
Phase: opening. Castle kingside (urgent). Blockade e6 with Nc6, probe with c5 or e5 break. Develop Bf5 or Be6 with tempo. Neutralize White's spatial grip within 3 moves. Transition to middlegame with castled king, active pieces (Bf5/Be6), and central counterplay offsetting White's e6 outpost and development lead. Critical: King in center (must castle within 1–2 moves before White exploits it); e6 pawn is isolated but advanced (blockade via Nc6, soften via c5/e5); Qd4 exposed to Ne5 fork threat (gain tempo); Four pieces undeveloped (tempo-building is critical, not passive defense).
6. Candidates Candidates: Nxd4 (Trades Knight for Queen; White recaptures Nxd4 but Black gains +6 material decisively.) | Ne5 (Centralizes Knight with tempo, attacks f3 Knight, drives central counterplay per plan.) | Bxe6 (Develops Bi…
- chess.js.legal_moves0ms
- llm.candidates79741ms · $0.0445
full reasoning
Candidates: Nxd4 (Trades Knight for Queen; White recaptures Nxd4 but Black gains +6 material decisively.) | Ne5 (Centralizes Knight with tempo, attacks f3 Knight, drives central counterplay per plan.) | Bxe6 (Develops Bishop, removes advanced pawn, prepares castling, consolidates position per plan.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxd4 — Queen on d4 is defended only by Nf3, so Nxd4 forces Nxd4; Black nets Q-N (+6 material) and wins decisively. Tactic over consolidation.. Rejected: c6e5, c8e6.
- llm.reflect43911ms · $0.0243
9. Commit Commit Nxd4 (c6d4).
13.Nxd4Sonnet
1. Observe Halbzug 13, Weiss am Zug. Phase: Eroeffnung. Weiss +1 Punkte. Legale Zuege: 34. 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-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. Capture the Black knight on d4 immediately — it threatens Nc2+ forking Ke1 and Ra1 (losing the exchange). After Nf3xd4 no Black piece can recapture (Nf6 out of range, Bc8 is light-squared, Bf8 diagonal mi…
- llm.plan91533ms · $0.0724
full reasoning
Phase: opening. Capture the Black knight on d4 immediately — it threatens Nc2+ forking Ke1 and Ra1 (losing the exchange). After Nf3xd4 no Black piece can recapture (Nf6 out of range, Bc8 is light-squared, Bf8 diagonal misses d4), so White wins a full piece. Next: Nb1-c3 per the knights-before-bishops heuristic, then castle kingside. Win the active Nd4 for free, complete development via Nc3 and either bishop, castle kingside for safety, and then press Black's king stranded in the center behind the e6 anchor which permanently severs Black's two halves. Critical: Nd4 threatens Nc2+ this very move — forks Ke1 and Ra1, winning the exchange if ignored; After Nxd4 no legal recapture exists for Black — free knight gain; e6 pawn blocks Ke8 escape routes and cuts communication between Black's queenside and kingside; knights-before-bishops heuristic confirms Nb1-c3 as the immediate follow-up to centralize and cover d5.
6. Candidates Candidates: Nxd4 (Captures the undefended Nd4 for free; prevents immediate Nc2+ fork threat against Ke1 and Ra1.) | exf7+ (Pawn captures with check, attacking Ke8 and Rh8 simultaneously — creates multiple threats per Gen…
- chess.js.legal_moves0ms
- llm.candidates11385ms · $0.0038
full reasoning
Candidates: Nxd4 (Captures the undefended Nd4 for free; prevents immediate Nc2+ fork threat against Ke1 and Ra1.) | exf7+ (Pawn captures with check, attacking Ke8 and Rh8 simultaneously — creates multiple threats per Generation 0 directive.) | Nc3 (Knights-before-bishops heuristic: centralizes, covers d5, supports active piece coordination after Nxd4.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxd4 — Wins a free knight immediately — Nd4 had no legal recaptor (Nf6 reaches e4/d5/not d4; Bc8 is dark-squared, d4 is light). Eliminates the Nc2+ fork threat against Ke1+Ra1 before it fires.. Rejected: e6f7…
- llm.reflect41216ms · $0.0299
full reasoning
Final pick: Nxd4 — Wins a free knight immediately — Nd4 had no legal recaptor (Nf6 reaches e4/d5/not d4; Bc8 is dark-squared, d4 is light). Eliminates the Nc2+ fork threat against Ke1+Ra1 before it fires.. Rejected: e6f7, b1c3.
9. Commit Commit Nxd4 (f3d4).
14...Be7Haiku
1. Observe Halbzug 14, Schwarz am Zug. Phase: Eroeffnung. Weiss +4 Punkte. Legale Zuege: 28. 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Castle kingside immediately to secure king from center. Blockade e6 with Nc6, softening the outpost. Generate central counterplay (c5 or e5 break). Develop Bf5/Be6 with tempo. Offset White's spatial grip …
- llm.plan22778ms · $0.0103
full reasoning
Phase: opening. Castle kingside immediately to secure king from center. Blockade e6 with Nc6, softening the outpost. Generate central counterplay (c5 or e5 break). Develop Bf5/Be6 with tempo. Offset White's spatial grip within 3–4 moves. Transition to middlegame with castled king, active pieces (Bf5/Be6), and central counterplay that neutralizes White's e6 outpost and compensates for development lag. Critical: king-in-center-highest-priority-threat; e6-pawn-isolated-but-advanced-blockade-critical; four-pieces-undeveloped-must-build-tempo-not-defend-passively; white-nd4-controls-f5-e6-c6-must-contest; white-initiative-black-must-equalize-immediately-or-falls-worse.
6. Candidates Candidates: Bxe6 (Neutralizes White's dangerous e6 outpost immediately. After recapture, Black equalizes and removes main spatial advantage.) | Bb4+ (Develops with check, forcing White response. Gains tempo for piece coo…
- chess.js.legal_moves0ms
- llm.candidates45795ms · $0.0244
full reasoning
Candidates: Bxe6 (Neutralizes White's dangerous e6 outpost immediately. After recapture, Black equalizes and removes main spatial advantage.) | Bb4+ (Develops with check, forcing White response. Gains tempo for piece coordination before castling kingside.) | Be7 (Develops bishop and prepares immediate kingside castling per plan priority. Solidifies king safety, enables central counterplay.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Be7 — King-in-center (highest priority per plan) requires immediate castling. Be7 clears f8, enabling kingside castling next move. Solidifies king safety, then enables Nc6 blockade per plan sequence.. Rejecte…
- llm.reflect60281ms · $0.0322
full reasoning
Final pick: Be7 — King-in-center (highest priority per plan) requires immediate castling. Be7 clears f8, enabling kingside castling next move. Solidifies king safety, then enables Nc6 blockade per plan sequence.. Rejected: c8e6, f8b4.
9. Commit Commit Be7 (f8e7).
15.Nc3Sonnet
1. Observe Halbzug 15, Weiss am Zug. Phase: Eroeffnung. Weiss +4 Punkte. Legale Zuege: 36. 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-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Complete development via Nb1-c3 (knights-before-bishops heuristic, memory hit confirmed), then develop a bishop to e3 or f4, and castle kingside. The e6 pawn is not under immediate threat, so no urgency t…
- llm.plan75328ms · $0.0549
full reasoning
Phase: opening. Complete development via Nb1-c3 (knights-before-bishops heuristic, memory hit confirmed), then develop a bishop to e3 or f4, and castle kingside. The e6 pawn is not under immediate threat, so no urgency to push or trade it now. Convert the material surplus (+4) by finishing development swiftly and castling, then use the e6 wedge — which permanently severs Black's kingside from queenside — to create a decisive positional stranglehold and transition into a winning endgame. Critical: Black's Nf6 can reroute via d5 or e4 to challenge Nd4 and contest the center — Nc3 preemptively covers d5; White's king on e1 is still exposed; castling is the priority after one more development move; The e6 pawn attacks f7 and d7 — Black must remain passive, giving White free tempi to complete development; Both bishops on c1 and f1 are undeveloped; Bc1-e3 pressures the diagonal toward b6/a7 and covers d4.
6. Candidates Candidates: Nc3 (Knights-before-bishops heuristic (memory confirmed); covers d5, preventing Nf6 reroute to challenge Nd4.) | Be3 (Plan-prescribed development; pressures b6/a7 diagonal, covers d4, prepares kingside castli…
- chess.js.legal_moves0ms
- llm.candidates22325ms · $0.0163
full reasoning
Candidates: Nc3 (Knights-before-bishops heuristic (memory confirmed); covers d5, preventing Nf6 reroute to challenge Nd4.) | Be3 (Plan-prescribed development; pressures b6/a7 diagonal, covers d4, prepares kingside castling.) | Bf4 (Active bishop development; controls e5/d6 outpost zone, keeps e6 wedge intact while developing.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nc3 — Nc3 immediately covers d5, blocking Nf6-d5 reroute that would directly challenge Nd4. Knights-before-bishops heuristic confirmed by memory; bishop development follows next move, then castle.. Rejected: …
- llm.reflect20214ms · $0.0130
full reasoning
Final pick: Nc3 — Nc3 immediately covers d5, blocking Nf6-d5 reroute that would directly challenge Nd4. Knights-before-bishops heuristic confirmed by memory; bishop development follows next move, then castle.. Rejected: c1e3, c1f4.
9. Commit Commit Nc3 (b1c3).
16...Ne4Haiku
1. Observe Halbzug 16, Schwarz am Zug. Phase: Mittelspiel. Weiss +4 Punkte. Legale Zuege: 31. 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-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Secure king via castling immediately, blockade the advanced e6 pawn with Nc6, and generate central counterplay through c5 or e5 breaks. Offset White's spatial advantage and regain initiative through fo…
- llm.plan26832ms · $0.0130
full reasoning
Phase: middlegame. Secure king via castling immediately, blockade the advanced e6 pawn with Nc6, and generate central counterplay through c5 or e5 breaks. Offset White's spatial advantage and regain initiative through forced tempo moves within next 3 moves. Achieve a consolidated middlegame with Black's king castled to safety, pieces actively placed (Bf5, Be6, Nc6 blockading), and central tension resolved favorably. Neutralize the e6 outpost through piece coordination and central counterplay. Critical: King in center is primary tactical threat from White's centralized knights; e6 outpost is strong but must be blockaded or contested to prevent piece infiltration; Development lag requires tempo-gaining moves, not passive consolidation.
6. Candidates Candidates: O-O (King safety paramount—castles immediately, removes tactical vulnerability from White's centralized knights) | Ne4 (Attacks c3 knight with tempo, centralizes piece, generates immediate threats and central…
- chess.js.legal_moves0ms
- llm.candidates46247ms · $0.0256
full reasoning
Candidates: O-O (King safety paramount—castles immediately, removes tactical vulnerability from White's centralized knights) | Ne4 (Attacks c3 knight with tempo, centralizes piece, generates immediate threats and central counterplay) | Bxe6 (Removes strong e6 outpost, forces Nxe6 recapture, eliminates White's dominant pawn)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ne4 — Attacks c3 knight with tempo, centralizes piece, forces White to respond immediately. Generates central counterplay addressing development lag. Forces White's hand before consolidating positional advant…
- llm.reflect38734ms · $0.0187
full reasoning
Final pick: Ne4 — Attacks c3 knight with tempo, centralizes piece, forces White to respond immediately. Generates central counterplay addressing development lag. Forces White's hand before consolidating positional advantage.. Rejected: e8g8, c8e6.
9. Commit Commit Ne4 (f6e4).
17.exf7+Sonnet
1. Observe Halbzug 17, Weiss am Zug. Phase: Mittelspiel. Weiss +4 Punkte. Legale Zuege: 38. 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_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Exploit Black's undefended e4 knight (outpost heuristic: strong square, but unguarded — the outpost becomes a liability without support), develop the light-squared bishop, castle kingside, then activat…
- llm.plan114426ms · $0.0896
full reasoning
Phase: middlegame. Exploit Black's undefended e4 knight (outpost heuristic: strong square, but unguarded — the outpost becomes a liability without support), develop the light-squared bishop, castle kingside, then activate rooks on the open d-file to press the material edge over 3–5 moves. Convert the +4 surplus into a clean technical win by eliminating Black's most active piece, completing development, and placing rooks on open and semi-open files (open-file-rooks heuristic) to coordinate decisive pressure against Black's split position. Critical: Black's e4 knight is undefended — it is the highest-priority tactical target this move; any delay risks it becoming properly supported; Black's e4 knight threatens to leap to f2, forking the uncastled king and h1-rook — this counterplay must be pre-empted immediately; Both kings are uncastled — White must castle within the next 2 moves or risk unexpected activity on the e-file balancing the material deficit.
6. Candidates Candidates: exf7+ (Forcing check exploits advanced pawn; creates promotion threat on f8; pre-empts Nf2+ by attacking Black's king immediately.) | Nxe4 (Captures undefended e4 knight (outpost heuristic: unguarded outpost …
- chess.js.legal_moves0ms
- llm.candidates30260ms · $0.0236
full reasoning
Candidates: exf7+ (Forcing check exploits advanced pawn; creates promotion threat on f8; pre-empts Nf2+ by attacking Black's king immediately.) | Nxe4 (Captures undefended e4 knight (outpost heuristic: unguarded outpost = liability); removes Nf2+ threat; gains material.) | Bb5+ (Develops bishop with check; disrupts Black's coordination; forces king or blocker, opening lines for open-file-rooks pressure.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: exf7+ — Forcing check compels king to move; then Nxe4 wins the undefended knight regardless of king's reply. If Kf8, White keeps a pawn one step from queening — check + passer + material gain in one sequence.…
- llm.reflect38863ms · $0.0281
full reasoning
Final pick: exf7+ — Forcing check compels king to move; then Nxe4 wins the undefended knight regardless of king's reply. If Kf8, White keeps a pawn one step from queening — check + passer + material gain in one sequence.. Rejected: c3e4, f1b5.
9. Commit Commit exf7+ (e6f7).
18...Kxf7Haiku
1. Observe Halbzug 18, Schwarz am Zug. Phase: Mittelspiel. Weiss +5 Punkte. Legale Zuege: 4. Schach! Criticality: 0.45.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search19ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Next 2–3 moves: address the f7 promotion threat with forcing tactics (Nf2+, Ng3+, or Nxc3) while castling kingside to secure the king. Generate sufficient tempo to disrupt White's coordination and avoi…
- llm.plan38491ms · $0.0184
full reasoning
Phase: middlegame. Next 2–3 moves: address the f7 promotion threat with forcing tactics (Nf2+, Ng3+, or Nxc3) while castling kingside to secure the king. Generate sufficient tempo to disrupt White's coordination and avoid passive defense of f8. Exploit the Ne4's centrality to create immediate tactical threats (checks, forks, captures) while forcing king to safety via O-O, then consolidate with piece activity against White's exposed center and flanks. Critical: f7 pawn threatens f8=Q next move—existential threat; Black king in center, uncastled—must move or castle to avoid tactical collapse; Ne4 is Black's sole active piece—checks (Nf2+, Ng3+) or captures (Nxc3) are only realistic counterplay; White Nd4 and Nc3 control d-file and center, support f7 promotion.
6. Candidates Candidates: Kxf7 (Captures promotion threat, centralizes king for tactical counterplay, forces White to engage with active pieces immediately.) | Kf8 (Blocks f8 promotion square, maintains back-rank king safety, preserve…
- chess.js.legal_moves0ms
- llm.candidates21757ms · $0.0089
full reasoning
Candidates: Kxf7 (Captures promotion threat, centralizes king for tactical counterplay, forces White to engage with active pieces immediately.) | Kf8 (Blocks f8 promotion square, maintains back-rank king safety, preserves structural integrity while removing imminent threat.) | Kd7 (Redirects king toward center-left, escapes pawn threat, creates flexibility for piece coordination and later piece activity.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxf7 — Removes f7 pawn threat immediately, centralizes king, maintains Ne4 forcing counterplay with checks and captures.. Rejected: e8f8, e8d7.
- llm.reflect67435ms · $0.0352
9. Commit Commit Kxf7 (e8f7).
19.Bc4+Sonnet
1. Observe Halbzug 19, Weiss am Zug. Phase: Mittelspiel. Weiss +4 Punkte. Legale Zuege: 38. Criticality: 0.10.
- 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_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Capture the undefended Ne4 immediately (outpost heuristic: strong square but no support = liability) to push surplus from +4 to +5, then castle kingside within 1–2 moves to connect rooks and target the…
- llm.plan40269ms · $0.0282
full reasoning
Phase: middlegame. Capture the undefended Ne4 immediately (outpost heuristic: strong square but no support = liability) to push surplus from +4 to +5, then castle kingside within 1–2 moves to connect rooks and target the open d-file with both rooks — exactly the open-file-rooks plan from prior ply. Eliminate Black's only active piece (Ne4), complete development via kingside castling, and press the material edge with doubled rooks on the d-file against Black's exposed king on f7 and fragmented pawn structure. Critical: Ne4 hangs — Nc3 attacks it directly, no Black recapture available; Black king on f7 is uncastled and exposed to rook pressure down the d/e files; Bc1 still undeveloped — castling is the fastest way to connect Ra1-Rh1 for the rook-activation plan; No Black counterplay threats visible this ply — tempo is fully White's.
6. Candidates Candidates: Nxe4 (Captures the undefended Ne4 outpost immediately, gaining material and eliminating Black's only active piece.) | Bc4+ (Develops bishop with check, forces king retreat, and clears f1-square to enable futu…
- chess.js.legal_moves0ms
- llm.candidates29734ms · $0.0224
full reasoning
Candidates: Nxe4 (Captures the undefended Ne4 outpost immediately, gaining material and eliminating Black's only active piece.) | Bc4+ (Develops bishop with check, forces king retreat, and clears f1-square to enable future kingside castling and rook activation.) | Nd5 (Occupies dominant central outpost, attacks Be7 and creates multiple threats leveraging superior piece coordination.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bc4+ — Develops bishop, forces Black king from f7 to exposed central square (e.g. Ke6), then Nxe4 next move wins the hanging knight anyway — gaining a free tempo while Black's king worsens.. Rejected: c3e4, c…
- llm.reflect78776ms · $0.0656
full reasoning
Final pick: Bc4+ — Develops bishop, forces Black king from f7 to exposed central square (e.g. Ke6), then Nxe4 next move wins the hanging knight anyway — gaining a free tempo while Black's king worsens.. Rejected: c3e4, c3d5.
9. Commit Commit Bc4+ (f1c4).
20...Kg6Haiku
1. Observe Halbzug 20, 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_search15ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Strike with Ne4 forcing checks (Nf2+ or Ng3+) to destabilize White's coordination and king safety. Capture Nc3 to reduce material gap if tempo permits. Consolidate king safety (Kg8 or Kg6) while mainta…
- llm.plan47253ms · $0.0259
full reasoning
Phase: middlegame. Strike with Ne4 forcing checks (Nf2+ or Ng3+) to destabilize White's coordination and king safety. Capture Nc3 to reduce material gap if tempo permits. Consolidate king safety (Kg8 or Kg6) while maintaining Ne4 pressure. Two-move tactical horizon: deliver check, force response, execute follow-up. Exploit forcing tactics and tempo from Ne4 checks to generate sufficient piece activity and threats that White's king crisis overcomes Black's material deficit. Critical: White's e1 king is vulnerable to Ne4 forks, discoveries, and knight checks; Nd4-Nc3 pair dominates center but can be disrupted by forcing sequences; Black material down ~4 points; uncastled king on f7 is exposed and limits maneuvering; Bc8 underdeveloped forces tempo-based tactics; Ne4 delivers concrete forcing checks from f2 or g3; Nxc3 breaks the knight pair; tactical fireworks essential before White consolidates initiative.
6. Candidates Candidates: Be6 (Develops Bc8, blocks Bc4 check, unblocks Ne4 for next-move forcing tactics (Nf2+ fork)) | Kg6 (Consolidates king safety toward g6 per plan, escapes check, enables Ne4 forcing checks immediately) | Kf6 (A…
- chess.js.legal_moves0ms
- llm.candidates38269ms · $0.0200
full reasoning
Candidates: Be6 (Develops Bc8, blocks Bc4 check, unblocks Ne4 for next-move forcing tactics (Nf2+ fork)) | Kg6 (Consolidates king safety toward g6 per plan, escapes check, enables Ne4 forcing checks immediately) | Kf6 (Activates king aggressively toward center, escapes check, supports Ne4 tactical fireworks next turn)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kg6 — Consolidates king to g6 per plan. Escapes Bc4 check and maintains Ne4 pressure for next-move tactics.. Rejected: c8e6, f7f6.
- llm.reflect65381ms · $0.0382
9. Commit Commit Kg6 (f7g6).
21.Nxe4Sonnet
1. Observe Halbzug 21, Weiss am Zug. Phase: Mittelspiel. Weiss +4 Punkte. Legale Zuege: 46. 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_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Capture the hanging Ne4 (Nc3xe4, no Black recapture available) to push surplus from +4 to +5, then castle kingside immediately to connect rooks. Target the open d-file with both rooks against Black's e…
- llm.plan37739ms · $0.0287
full reasoning
Phase: middlegame. Capture the hanging Ne4 (Nc3xe4, no Black recapture available) to push surplus from +4 to +5, then castle kingside immediately to connect rooks. Target the open d-file with both rooks against Black's exposed king on g6 and fragmented queenside pawns. Convert decisive material advantage by eliminating Black's only active piece, completing kingside castling, and doubling rooks on the d-file to exploit Black's exposed king and uncoordinated back rank — per the open-file-rooks heuristic. Critical: Ne4 is an outpost (memory: MIDDLE weak squares outpost) but entirely undefended — Nc3 attacks it directly, Be7 cannot recapture (wrong diagonal), Black king too far; White king exposed on e1 — castling KS is urgent before Black activates rooks on half-open files; Memory: MIDDLE open file rooks — d-file is open, both White rooks should target it post-castling; Black king on g6 is vulnerable to Bc4 diagonal pressure and eventual rook lift.
6. Candidates Candidates: Nxe4 (Captures hanging Ne4 with no Black recapture available; pushes material surplus from +4 to +5 per plan.) | O-O (Urgently connects rooks; enables doubling on open d-file targeting Black's exposed king on…
- chess.js.legal_moves0ms
- llm.candidates23877ms · $0.0152
full reasoning
Candidates: Nxe4 (Captures hanging Ne4 with no Black recapture available; pushes material surplus from +4 to +5 per plan.) | O-O (Urgently connects rooks; enables doubling on open d-file targeting Black's exposed king on g6.) | Bf7+ (Exploits Bc4 diagonal pressure on exposed Black king g6; checks and disrupts Black coordination.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxe4 — Ne4 is undefended (Be7 cannot recapture diagonally to e4). Capturing immediately removes the Nd2 fork threat that would arise after O-O, where Nd2 forks Bc4 and Rf1 simultaneously. Win material first, …
- llm.reflect87898ms · $0.0677
full reasoning
Final pick: Nxe4 — Ne4 is undefended (Be7 cannot recapture diagonally to e4). Capturing immediately removes the Nd2 fork threat that would arise after O-O, where Nd2 forks Bc4 and Rf1 simultaneously. Win material first, castle safely next.. Rejected: e1g1, c4f7.
9. Commit Commit Nxe4 (c3e4).
22...Bb4+Haiku
1. Observe Halbzug 22, Schwarz am Zug. Phase: Mittelspiel. Weiss +7 Punkte. Legale Zuege: 28. 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-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Improve king safety (Kg8 or Kf7), then activate rooks on d- and f-files to create counterplay and threats against White's e1-king. Drive piece activation and tactical threats to generate sufficient com…
- llm.plan50814ms · $0.0282
full reasoning
Phase: middlegame. Improve king safety (Kg8 or Kf7), then activate rooks on d- and f-files to create counterplay and threats against White's e1-king. Drive piece activation and tactical threats to generate sufficient compensation for material deficit. Critical: White threatens Nf6+ forking king and rook; Black must secure king immediately; Black rooks completely passive on 8th rank; activation on central files is critical for counterplay; White's knight pair (Nd4, Ne4) dominates space; Black must create concrete threats to offset material disadvantage.
6. Candidates Candidates: Bb4+ (Forcing check gains tempo, king to move, Black organizes defense against Nf6+ threat.) | c5 (Attacks strong Nd4 center knight, forces White to respond, reduces spatial advantage.) | Bf6 (Prevents Nf6+ f…
- chess.js.legal_moves0ms
- llm.candidates44731ms · $0.0249
full reasoning
Candidates: Bb4+ (Forcing check gains tempo, king to move, Black organizes defense against Nf6+ threat.) | c5 (Attacks strong Nd4 center knight, forces White to respond, reduces spatial advantage.) | Bf6 (Prevents Nf6+ fork threat, develops bishop actively, solidifies kingside structure completely.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bb4+ — Forcing check gains tempo and disrupts White's Nf6+ attack setup. King is forced to move, giving Black a crucial follow-up move to organize defense or create counter-threats.. Rejected: c7c5, e7f6.
- llm.reflect52263ms · $0.0254
9. Commit Commit Bb4+ (e7b4).
23.c3Sonnet
1. Observe Halbzug 23, Weiss am Zug. Phase: Mittelspiel. Weiss +7 Punkte. Legale Zuege: 7. Schach! Criticality: 0.25.
- 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. Resolve check immediately by capturing Bb4 with Bc4xBb4 — Black has no recapture, so White gains a free bishop pushing the surplus further. Then castle kingside to connect rooks and remove the king fro…
- llm.plan82844ms · $0.0682
full reasoning
Phase: middlegame. Resolve check immediately by capturing Bb4 with Bc4xBb4 — Black has no recapture, so White gains a free bishop pushing the surplus further. Then castle kingside to connect rooks and remove the king from the open e-file. Convert the decisive +7 material advantage by eliminating Black's sole active piece (Bb4), completing kingside castling per the open-file-rooks heuristic, then doubling rooks on the d/e-files to exploit Black's exposed king on g6 and inert back rank. Critical: White king is in check from Bb4 along the b4-c3-d2-e1 diagonal — only 7 legal replies exist, check resolution is mandatory; Bc4xBb4 wins the bishop outright: no Black pawn or piece can recapture on b4 (nearest pawn is c7, wrong diagonal; king too far); After check resolution, castling rights KQ remain — kingside castling connects Ra1+Rh1 and satisfies the open-file-rooks heuristic against Black's passive Ra8/Rh8; knights on d4/e4 remain as strong outpost anchors per the weak-squares-outpost heuristic.
6. Candidates Candidates: Nc3 (Blocks check while maintaining active piece play; knight stays central attacking d5/e4 squares per outpost heuristic.) | c3 (Drives away Bb4 with tempo, resolving check via pawn and opening c1-bishop's d…
- chess.js.legal_moves0ms
- llm.candidates10466ms · $0.0037
full reasoning
Candidates: Nc3 (Blocks check while maintaining active piece play; knight stays central attacking d5/e4 squares per outpost heuristic.) | c3 (Drives away Bb4 with tempo, resolving check via pawn and opening c1-bishop's diagonal for active play.) | Nd2 (Resolves check by interposition; knight retreats safely while preserving open-file-rooks castling path per heuristic.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c3 — Resolves check AND attacks Bb4 simultaneously — bishop must retreat, gifting White a free tempo to castle kingside next move per the open-file-rooks heuristic. Pawn on c3 permanently defends d4-outpost k…
- llm.reflect54727ms · $0.0400
full reasoning
Final pick: c3 — Resolves check AND attacks Bb4 simultaneously — bishop must retreat, gifting White a free tempo to castle kingside next move per the open-file-rooks heuristic. Pawn on c3 permanently defends d4-outpost knight.. Rejected: e4c3, e4d2.
9. Commit Commit c3 (c2c3).
24...Bxc3+Haiku
1. Observe Halbzug 24, Schwarz am Zug. Phase: Mittelspiel. Weiss +7 Punkte. Legale Zuege: 26. 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-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Secure Kg6 from Nf6+ fork (move Kg8 or Kf7). Activate Ra8/Rh8 on open d/f-files to threaten White's e1-king. Seek piece trades to offset 2-knight deficit via rook pressure. Trade pieces and generate ta…
- llm.plan30242ms · $0.0147
full reasoning
Phase: middlegame. Secure Kg6 from Nf6+ fork (move Kg8 or Kf7). Activate Ra8/Rh8 on open d/f-files to threaten White's e1-king. Seek piece trades to offset 2-knight deficit via rook pressure. Trade pieces and generate tactical threats against White's king to compensate for material deficit; rook activation on central files is the only viable counterplay. Critical: Nf6+ fork (king and h8-rook) is immediate threat; Ra8/Rh8 inactive on 8th rank—deadweight until activated; 2-knight disadvantage means Black needs concrete attacking chances, not slow maneuvering.
6. Candidates Candidates: Bxc3+ (Check forces Kd2/Kf1, neutralizes Nf6+ fork threat, trades bishop for pawn, disrupts White structure) | Rb8 (Activates rook on half-open b-file, prepares lateral pressure, improves Black counterplay on…
- chess.js.legal_moves0ms
- llm.candidates16279ms · $0.0069
full reasoning
Candidates: Bxc3+ (Check forces Kd2/Kf1, neutralizes Nf6+ fork threat, trades bishop for pawn, disrupts White structure) | Rb8 (Activates rook on half-open b-file, prepares lateral pressure, improves Black counterplay on queenside) | Bd7 (Develops bishop, supports rook activation on d/f-files, reduces king vulnerability via piece coordination)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxc3+ — Bxc3+ forces White king to move, neutralizing Nf6+ fork threat (king+h8-rook). Eliminates key pawn, opens rook lines, initiates piece trades. Most forcing move.. Rejected: a8b8, c8d7.
- llm.reflect40948ms · $0.0223
9. Commit Commit Bxc3+ (b4c3).
25.Nxc3Sonnet
1. Observe Halbzug 25, Weiss am Zug. Phase: Mittelspiel. Weiss +6 Punkte. Legale Zuege: 7. Schach! 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-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: middlegame. Capture the checking bishop on c3 with Bc4xc3, eliminating Black's only active piece and widening the material surplus to ~+7. Then castle kingside (O-O) to connect rooks and remove the king from the e…
- llm.plan36256ms · $0.0266
full reasoning
Phase: middlegame. Capture the checking bishop on c3 with Bc4xc3, eliminating Black's only active piece and widening the material surplus to ~+7. Then castle kingside (O-O) to connect rooks and remove the king from the e1 danger zone. Within 3 moves: rooks target the open d/e-files against Black's exposed king on g6. Convert the dominant +6 material surplus into a direct mating attack by coordinating the two well-placed knights (d4/e4 outposts — per weak-squares heuristic) with rooks doubled on open central files (per open-file-rooks heuristic) against Black's stranded king on g6. Critical: Check from Bc3 must be resolved this move — only 7 legal replies exist; Bc4xc3 is the strongest as it removes the attacker and gains material; White king on e1 is unsafe on the open e-file after resolution — castling kingside is the immediate follow-up plan; Black king on g6 is exposed with no shelter and no defensive pieces after Bc3 is captured — attack window opens immediately.
6. Candidates Candidates: Nxc3 (Captures checking bishop, gains material (+3), knight stays active on c3 targeting open central files per active-piece-play directive.) | bxc3 (Pawn recaptures checking bishop, opens b-file for rook, ma…
- chess.js.legal_moves0ms
- llm.candidates34935ms · $0.0296
full reasoning
Candidates: Nxc3 (Captures checking bishop, gains material (+3), knight stays active on c3 targeting open central files per active-piece-play directive.) | bxc3 (Pawn recaptures checking bishop, opens b-file for rook, maintains knight on e4 outpost per weak-squares heuristic.) | Kf1 (King steps out of check to f1, escapes open e-file danger, prepares rook coordination per king-safety heuristic.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxc3 — Nxc3 eliminates the checking bishop (+3 material), lands the knight on active c3 controlling d5/b5/a4, preserves O-O castling rights for next move, and keeps both knights centralized per active-piece-p…
- llm.reflect45739ms · $0.0326
full reasoning
Final pick: Nxc3 — Nxc3 eliminates the checking bishop (+3 material), lands the knight on active c3 controlling d5/b5/a4, preserves O-O castling rights for next move, and keeps both knights centralized per active-piece-play directive.. Rejected: b2c3, e1f1.
9. Commit Commit Nxc3 (e4c3).
26...Re8+Haiku
1. Observe Halbzug 26, Schwarz am Zug. Phase: Mittelspiel. Weiss +9 Punkte. Legale Zuege: 20. 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-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Secure king from Nf6+ fork (Kg8 or Kf7). Activate rooks to d/f-files within next 2 moves to pressure White's e1-king. Seek piece trades to offset -9 material deficit through tactical pressure. Accept m…
- llm.plan16697ms · $0.0067
full reasoning
Phase: middlegame. Secure king from Nf6+ fork (Kg8 or Kf7). Activate rooks to d/f-files within next 2 moves to pressure White's e1-king. Seek piece trades to offset -9 material deficit through tactical pressure. Accept material disadvantage; generate concrete rook threats on open files and exploit White's exposed king to force piece exchanges, reducing White's attacking potential. Critical: Nf6+ fork (checks Kg6, forks Rh8) is next move threat; Ra8 and Rh8 inactive—deadweight; must reach central files now; Down 9 points demands immediate tactical threats, not slow maneuvering.
6. Candidates Candidates: Re8+ (Check forces king move; activates rook with tempo; controls e-file pressure) | Kh5 (Escapes Nf6+ fork threat; secures king; maintains tactical flexibility for rook pressure)
- chess.js.legal_moves0ms
- llm.candidates52758ms · $0.0298
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Re8+ — Activates h8 rook with tempo-check; seizes e-file immediately; escapes Nf6+ fork threat; forces White king move; generates critical tactical pressure for material-starved position.. Rejected: g6h5.
- llm.reflect22222ms · $0.0100
9. Commit Commit Re8+ (h8e8).
27.Ne6Sonnet
1. Observe Halbzug 27, Weiss am Zug. Phase: Mittelspiel. Weiss +9 Punkte. Legale Zuege: 10. Schach! Criticality: 0.25.
- 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 middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Resolve Re8 check by interposing on e2 (Bc4-e2 or Ne-e2), then castle kingside to activate both rooks. Within 3 moves: rooks press open e-file per open-file-rooks heuristic against Black's isolated kin…
- llm.plan56222ms · $0.0425
full reasoning
Phase: middlegame. Resolve Re8 check by interposing on e2 (Bc4-e2 or Ne-e2), then castle kingside to activate both rooks. Within 3 moves: rooks press open e-file per open-file-rooks heuristic against Black's isolated king. Convert +9 material into forced mating attack — two knights on strong outpost squares (per weak-squares heuristic) plus rooks doubled on e-file create irresistible pressure on Black's undefended king on g6. Critical: Re8 check is forcing — castling now illegal, must interpose or move king; Black king on g6 has zero shelter and no piece coordination; Bc4-e2 interpose preferred — keeps both bishops active and unblocks rook path to e1-e8.
6. Candidates Candidates: Be2 (Interposes on e2 resolving Re8 check, keeps bishop active, unblocks e-file for rook doubling per open-file heuristic.) | Ne6 (Interposes on strong e6 outpost per weak-squares heuristic; knight attacks c7…
- chess.js.legal_moves0ms
- llm.candidates33742ms · $0.0277
full reasoning
Candidates: Be2 (Interposes on e2 resolving Re8 check, keeps bishop active, unblocks e-file for rook doubling per open-file heuristic.) | Ne6 (Interposes on strong e6 outpost per weak-squares heuristic; knight attacks c7/g7 creating multiple threats immediately.) | Be6 (Aggressive interpose on e6 attacking Bc8; bishop penetrates enemy camp while resolving check with tempo.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ne6 — Knight reaches dominant e6 outpost (weak-squares heuristic): threatens Nxg7+ attacking exposed king and Nxc7 forking Ra8 simultaneously. Even after Rxe6 trade, White castles safely and rooks dominate op…
- llm.reflect77774ms · $0.0577
full reasoning
Final pick: Ne6 — Knight reaches dominant e6 outpost (weak-squares heuristic): threatens Nxg7+ attacking exposed king and Nxc7 forking Ra8 simultaneously. Even after Rxe6 trade, White castles safely and rooks dominate open e-file per open-file-rooks heuristic.. Rejected: c4e2, c4e6.
9. Commit Commit Ne6 (d4e6).
28...Rxe6+Haiku
1. Observe Halbzug 28, Schwarz am Zug. Phase: Mittelspiel. Weiss +9 Punkte. Legale Zuege: 21. 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-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate rooks to d-file and first rank, threatening opponent's king with forcing checks. Down 9 material demands immediate tactical threats, not slow maneuvering. Rook pressure on open files and back …
- llm.plan108902ms · $0.0621
full reasoning
Phase: middlegame. Activate rooks to d-file and first rank, threatening opponent's king with forcing checks. Down 9 material demands immediate tactical threats, not slow maneuvering. Rook pressure on open files and back rank forces opponent's king retreat, offsetting material deficit. Critical: Opponent's knight threatens king with forcing check; Black rooks inactive on marginal files—must reach center; Opponent's king on e1 exposed to back-rank rook tactics.
6. Candidates Candidates: Rxe6+ (Check wins knight with tempo. Forcing move cuts material gap, critical when down material.) | Bxe6 (Solidly wins the dangerous knight, removes attacker from center, improves piece coordination.) | Rb8 …
- chess.js.legal_moves0ms
- llm.candidates27730ms · $0.0131
full reasoning
Candidates: Rxe6+ (Check wins knight with tempo. Forcing move cuts material gap, critical when down material.) | Bxe6 (Solidly wins the dangerous knight, removes attacker from center, improves piece coordination.) | Rb8 (Activates rook toward center file. Prepares pressure on white king, improves rook placement.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rxe6+ — Check wins the knight with tempo. Forces White's response while immediately reducing material deficit by one piece. Rook gains activity and central control simultaneously.. Rejected: c8e6, a8b8.
- llm.reflect19275ms · $0.0085
9. Commit Commit Rxe6+ (e8e6).
29.Bxe6Sonnet
1. Observe Halbzug 29, Weiss am Zug. Phase: Mittelspiel. Weiss +6 Punkte. Legale Zuege: 8. Schach! 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-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search16ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Resolve the Re6 check ideally by capturing it outright (Bc4xe6), eliminating Black's only active piece. Then activate both rooks on the now-open e-file (per open-file-rooks heuristic) and press Black's…
- llm.plan50511ms · $0.0391
full reasoning
Phase: middlegame. Resolve the Re6 check ideally by capturing it outright (Bc4xe6), eliminating Black's only active piece. Then activate both rooks on the now-open e-file (per open-file-rooks heuristic) and press Black's shelter-less king on g6 with coordinated bishop-knight-rook pressure. Convert the +6 material surplus into a decisive mating attack: remove Re6 as the last Black counterplay piece, plant the Nc3 on a strong outpost square (per weak-squares heuristic — e5 or f4 are ideal with no Black pawn defenders), then double rooks on the e-file against the passive Ra8/Bc8 cluster. Critical: Re6 delivers check — this move is forced-response; Bxe6 captures the rook and solves check simultaneously (best candidate); Black king on g6 has zero pawn shelter and no piece coordination — target for mating attack once material recaptured; Ra8 and Bc8 are completely passive; Black has no counterplay after Re6 is removed; After check resolved: open e-file with rooks doubled is the main strategic lever per heuristic.
6. Candidates Candidates: Bxe6 (Captures checking rook outright — gains material, eliminates Black's sole active piece, resolves check in one move.) | Ne4 (Interposes knight centrally; targets e5/f6 outpost (weak-squares heuristic) wi…
- chess.js.legal_moves0ms
- llm.candidates25866ms · $0.0158
full reasoning
Candidates: Bxe6 (Captures checking rook outright — gains material, eliminates Black's sole active piece, resolves check in one move.) | Ne4 (Interposes knight centrally; targets e5/f6 outpost (weak-squares heuristic) with no Black pawn defenders.) | Be2 (Safe interposition preserving bishop for e-file rook activation plan (open-file-rooks heuristic), though forgoes material gain.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxe6 — Captures the checking rook outright — resolves check, nets a free rook (material surplus grows further), eliminates Black's only active piece, and opens the e-file for White's doubled rooks immediately…
- llm.reflect19759ms · $0.0128
full reasoning
Final pick: Bxe6 — Captures the checking rook outright — resolves check, nets a free rook (material surplus grows further), eliminates Black's only active piece, and opens the e-file for White's doubled rooks immediately.. Rejected: c3e4, c4e2.
9. Commit Commit Bxe6 (c4e6).
30...Bxe6Haiku
1. Observe Halbzug 30, Schwarz am Zug. Phase: Mittelspiel. Weiss +11 Punkte. Legale Zuege: 13. Criticality: 0.10. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Create immediate forcing threats (checks, captures, threats) on central and back-rank lines to offset severe material deficit (-11). Activate rook and bishop toward opponent's exposed king before oppon…
- llm.plan36475ms · $0.0172
full reasoning
Phase: middlegame. Create immediate forcing threats (checks, captures, threats) on central and back-rank lines to offset severe material deficit (-11). Activate rook and bishop toward opponent's exposed king before opponent consolidates position. Black sacrifices positional safety for tactical initiative: rook pressure on open files and back rank forces opponent king retreat, creating perpetual check chances or tactical recoveries. Slow consolidation loses. Critical: White's advanced bishop immobile on center; Black must activate marginalized rook to open file for forcing pressure immediately; White's king vulnerable on back rank to rook and bishop tactics; Black's wing rook must penetrate central/first ranks for checks; Material deficit (-11) forces Black into forcing-only sequences; slow positional play insufficient—only tactics (checks, captures, threats) create survival.
6. Candidates Candidates: Bxe6 (Captures White's most active piece (bishop e6); removes primary attacking threat while forcing recapture sequence) | Rb8 (Activates marginalized rook along open file; first step toward back-rank infiltr…
- chess.js.legal_moves0ms
- llm.candidates26936ms · $0.0127
full reasoning
Candidates: Bxe6 (Captures White's most active piece (bishop e6); removes primary attacking threat while forcing recapture sequence) | Rb8 (Activates marginalized rook along open file; first step toward back-rank infiltration and central pressure on White king) | Bd7 (Develops bishop from blocked c8 square; supports rook's future invasions and prepares to control central lines and back rank)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxe6 — Immediate capture removes White's most active piece (e6-bishop). Wins material (-11 to -8), eliminates primary attacking threat vs f7, and forces White's response. Capture is the most forcing tactic av…
- llm.reflect69759ms · $0.0411
full reasoning
Final pick: Bxe6 — Immediate capture removes White's most active piece (e6-bishop). Wins material (-11 to -8), eliminates primary attacking threat vs f7, and forces White's response. Capture is the most forcing tactic available.. Rejected: a8b8, c8d7.
9. Commit Commit Bxe6 (c8e6).
31.O-OSonnet
1. Observe Halbzug 31, Weiss am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 30. 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. Castle O-O immediately to activate Rh1 and secure the White king, then press the exposed Black king on g6 via the open f-file. Reroute Nc3 toward e4-e5 to claim the dominant outpost (per weak-squares h…
- llm.plan58413ms · $0.0423
full reasoning
Phase: middlegame. Castle O-O immediately to activate Rh1 and secure the White king, then press the exposed Black king on g6 via the open f-file. Reroute Nc3 toward e4-e5 to claim the dominant outpost (per weak-squares heuristic — e5 has no Black pawn defender), while both rooks flood the f/e files (per open-file-rooks heuristic). Convert the +8 material surplus into a decisive kingside attack by activating both rooks on open files against Black's shelter-less king on g6, while the knight anchors on e5 and the bishop finds a productive diagonal — Be6 and Ra8 are too passive to generate meaningful counterplay. Critical: White king on e1 is the top priority — O-O is immediately available (f1/g1 empty) and must happen before rooks can coordinate; Bc1 is on a dark square and can never capture Be6 (light square) — the previous bishop-trade plan is moot; bishop must find its own diagonal; Black Be6 could slide to d5/c4 creating nuisance if White delays — tempo matters.
6. Candidates Candidates: O-O (Top priority per plan: secures king, activates Rh1 for f-file pressure against exposed Black king on g6.) | Ne4 (Reroutes knight toward dominant e5 outpost (no Black pawn defender); weak-squares heuristi…
- chess.js.legal_moves0ms
- llm.candidates20220ms · $0.0135
full reasoning
Candidates: O-O (Top priority per plan: secures king, activates Rh1 for f-file pressure against exposed Black king on g6.) | Ne4 (Reroutes knight toward dominant e5 outpost (no Black pawn defender); weak-squares heuristic — tempo vs Be6 nuisance.) | Nd5 (Centralization attacks Be6 directly, threatens Nc7 fork; open-file-rooks heuristic — clears path for rook coordination.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: O-O — King safety is prerequisite to all attacks. O-O activates Rh1 instantly for f-file pressure against the shelter-less Black king on g6, per open-file-rooks heuristic. Ne4/Nd5 without king safety is prema…
- llm.reflect8860ms · $0.0032
full reasoning
Final pick: O-O — King safety is prerequisite to all attacks. O-O activates Rh1 instantly for f-file pressure against the shelter-less Black king on g6, per open-file-rooks heuristic. Ne4/Nd5 without king safety is premature.. Rejected: c3e4, c3d5.
9. Commit Commit O-O (e1g1).
32...Bc4Haiku
1. Observe Halbzug 32, Schwarz am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 30. Criticality: 0.10. 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search10ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate rook from a8 to 3rd–4th rank (Ra3/Ra4) for forcing pressure. Deploy bishop to support. Create checks and piece threats before White consolidates position via rook doubling and pawn advances. P…
- llm.plan37264ms · $0.0181
full reasoning
Phase: middlegame. Activate rook from a8 to 3rd–4th rank (Ra3/Ra4) for forcing pressure. Deploy bishop to support. Create checks and piece threats before White consolidates position via rook doubling and pawn advances. Perpetual tactical pressure via active rook + bishop; force White king and pieces into defensive posture; aim for perpetual check or forced draw to escape material-disadvantaged endgame (−8 points). Critical: Rook passivity on a8 is Black's critical weakness; must activate immediately with tempo; White consolidation (Rf2, piece coordination) ends drawing chances if Black allows pause; Bishop on e6 well-placed but impotent without rook support; coordination mandatory; Back-rank vulnerabilities on rank 1–3 if Black invades with forcing moves; No time for positional maneuvers; forcing moves only or Black loses.
6. Candidates Candidates: Bc4 (Threatens a2 immediately, centralizes bishop. Forces White response, supports rook pressure.) | a6 (Clears a-file for rook activation (Ra7 next). Executes core plan: Ra3/Ra4.) | Bd5 (Centralizes bishop, …
- chess.js.legal_moves0ms
- llm.candidates88906ms · $0.0539
full reasoning
Candidates: Bc4 (Threatens a2 immediately, centralizes bishop. Forces White response, supports rook pressure.) | a6 (Clears a-file for rook activation (Ra7 next). Executes core plan: Ra3/Ra4.) | Bd5 (Centralizes bishop, controls key squares. Supports rook after a-file clearance.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bc4 — Attacks a2 immediately, forces White to respond (Na4, a3, or Rb1), creating tempo for rook activation. Forcing play prevents consolidation (Rf2) which ends drawing chances.. Rejected: a7a6, e6d5.
- llm.reflect40863ms · $0.0199
9. Commit Commit Bc4 (e6c4).
33.Nd5Sonnet
1. Observe Halbzug 33, Weiss am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 26. Criticality: 0.10.
- 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: middlegame. Activate Bc1 via f4 or e3 to immediately threaten the exposed Black king on g6 with tempo, while rerouting Nc3 to e4 and onward to d6 or f6 (fork threats). Per open-file-rooks heuristic, double rooks o…
- llm.plan65792ms · $0.0496
full reasoning
Phase: middlegame. Activate Bc1 via f4 or e3 to immediately threaten the exposed Black king on g6 with tempo, while rerouting Nc3 to e4 and onward to d6 or f6 (fork threats). Per open-file-rooks heuristic, double rooks on the f-file or drive Ra1 to a5 to cage the passive Ra8. Convert the +8 material surplus into a mating attack by exploiting the weak-squares outpost heuristic — e5 and f6 have zero Black pawn defenders — to plant a knight on a dominant fork square while both rooks close the net around the shelter-less Black king. Critical: Bc4 is active and eyes f1 and b3 — allowing Bc4xNc3 reduces the material lead and must be prevented; Black Ra8 is completely passive on a8 but activates instantly if given a free tempo; Nf6+ and Bf4+ are concrete convergent threats against Kg6 — one of them must be prepared; Avoid piece exchanges that simplify into a dead drawn ending — keep all four pieces coordinated for the attack.
6. Candidates Candidates: Nd5 (centre score=1) | Ne4 (centre score=1) | Na4 (development score=0) [Fallback: Claude CLI subprocess timed out after 120000ms]
- chess.js.legal_moves0ms
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nd5 — centre score=1. Rejected: c3e4, c3a4. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Nd5 (c3d5).
34...Rc8Haiku
1. Observe Halbzug 34, Schwarz am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 26. Criticality: 0.10. 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate Ra8 to a3, creating forcing threats via Ra1 (attacking Ra1) and Rc3 (attacking Bc1). Destabilize White's consolidation before Rf2 doubling and knight coordination entrench the advantage. Trans…
- llm.plan83882ms · $0.0448
full reasoning
Phase: middlegame. Activate Ra8 to a3, creating forcing threats via Ra1 (attacking Ra1) and Rc3 (attacking Bc1). Destabilize White's consolidation before Rf2 doubling and knight coordination entrench the advantage. Transform passive rook into attacking piece; pursue perpetual check or fortress via active piece coordination rather than passive endgame collapse in materially-lost position (−8). Critical: White's Nd5 is dangerous outpost; Nf4+ forks king, Rf2 consolidation ends drawing chances if uncontested. Act immediately.; Black's Ra8 is critically passive, severely limiting coordination. Activation to 3rd/4th rank is urgent before White locks position.; Material deficit (−8) means endgame is lost. Black must force perpetual or fortress via forcing pressure, not passive defense..
6. Candidates Candidates: Bxd5 (Eliminates White's dangerous Nd5 outpost—piece is undefended, wins knight cleanly.) | Rc8 (Activates rook on c-file, pressures Bc1, coordinates bishop for fortress/perpetual threats.) | Bxf1 (Forcing ca…
- chess.js.legal_moves0ms
- llm.candidates55743ms · $0.0288
full reasoning
Candidates: Bxd5 (Eliminates White's dangerous Nd5 outpost—piece is undefended, wins knight cleanly.) | Rc8 (Activates rook on c-file, pressures Bc1, coordinates bishop for fortress/perpetual threats.) | Bxf1 (Forcing capture; if Kxf1, king weakens; removes White's bishop and creates pressure.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rc8 — Activates rook to the c-file, directly pressures Bc1, creates forcing threats against White's consolidation (Rf2 doubling). Fits the plan: transform passive Ra8 into active coordinator via aggressive pl…
- llm.reflect92877ms · $0.0516
full reasoning
Final pick: Rc8 — Activates rook to the c-file, directly pressures Bc1, creates forcing threats against White's consolidation (Rf2 doubling). Fits the plan: transform passive Ra8 into active coordinator via aggressive placement before White locks position.. Rejected: c4d5, c4f1.
9. Commit Commit Rc8 (a8c8).
35.Ne7+Sonnet
1. Observe Halbzug 35, Weiss am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 27. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search6ms
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. Exploit Nf4+ check to force the Black king off g6 and gain tempo, then activate Bc1 to e3 or f4 to neutralise the immediate Bc4xf1 threat against Rf1. Coordinate both rooks — Rf1 to e1 or f4, Ra1 to d1…
- llm.plan94931ms · $0.0736
full reasoning
Phase: middlegame. Exploit Nf4+ check to force the Black king off g6 and gain tempo, then activate Bc1 to e3 or f4 to neutralise the immediate Bc4xf1 threat against Rf1. Coordinate both rooks — Rf1 to e1 or f4, Ra1 to d1 — to close escape routes around the displaced Black king. With a +8 surplus, White's only risk is Bc4xf1 reducing the material lead; eliminate that threat through tempo-forcing checks and bishop activation, then convert by caging the Black king between dominant knight and doubled rooks on central or kingside files. Critical: Bc4 threatens Bxf1 immediately via the c4-d3-e2-f1 diagonal — the rook on f1 is hanging if White wastes tempo; Nf4+ gives check to Black king on g6 (knight on f4 attacks g6), forcing king displacement before Bxf1 can be executed; Bc1 remains passive — must reach e3 or f4 within two moves or Black consolidates with Bc4 and Rc8 pressure on c2 flank.
6. Candidates Candidates: Ne7+ (Fork: check on g6 forces king away, then Nxc8 wins Black's rook for free — decisive material gain.) | Nf4+ (Tempo check displaces king from g6 per the plan, blocking immediate Bxf1 threat and enabling B…
- chess.js.legal_moves0ms
- llm.candidates114423ms · $0.0992
full reasoning
Candidates: Ne7+ (Fork: check on g6 forces king away, then Nxc8 wins Black's rook for free — decisive material gain.) | Nf4+ (Tempo check displaces king from g6 per the plan, blocking immediate Bxf1 threat and enabling Bc1 activation.) | Be3 (Activates passive Bc1 per plan directive; supports rook coordination on d1/e1 and contests central squares.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ne7+ — Ne7+ forks king on g6 AND rook on c8 simultaneously. Knight on e7 attacks both g6 (check forces king to move) and c8 — after any king reply, Nxc8 wins the rook for free. Bxf1 threat becomes irrelevant …
- llm.reflect32440ms · $0.0252
full reasoning
Final pick: Ne7+ — Ne7+ forks king on g6 AND rook on c8 simultaneously. Knight on e7 attacks both g6 (check forces king to move) and c8 — after any king reply, Nxc8 wins the rook for free. Bxf1 threat becomes irrelevant since Black must answer check first.. Rejected: d5f4, c1e3.
9. Commit Commit Ne7+ (d5e7).
36...Kf6Haiku
1. Observe Halbzug 36, Schwarz am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 3. Schach! Criticality: 0.55. 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Escape check (Kh6/Kh5/Kh7). Immediately activate Rc8 to c1 or c2, forcing perpetual checking patterns. Coordinate rook + bishop to harass White king and prevent Ne7-d5 consolidation. Generate tactical …
- llm.plan43718ms · $0.0214
full reasoning
Phase: middlegame. Escape check (Kh6/Kh5/Kh7). Immediately activate Rc8 to c1 or c2, forcing perpetual checking patterns. Coordinate rook + bishop to harass White king and prevent Ne7-d5 consolidation. Generate tactical noise to offset -8 material disadvantage. Survive via forced checks and rook activity; simplify into drawable endgame before White consolidates. Critical: Ne7 outpost giving check—forces immediate king move; Rc8 passivity fatal if not corrected post-escape; Kg6 has only 3 legal flight squares; Rf2+Nd5 threatens overwhelming consolidation—window closing; Rc1+ perpetual is Black's core tactical resource.
6. Candidates Candidates: Kf6 (Centralizes king escape; enables Rc1+ perpetual and best positioning to harass White king with rook coordination) | Kf7 (Flexible escape square; allows Rc1+ perpetual checks while keeping king near tacti…
- chess.js.legal_moves0ms
- llm.candidates32742ms · $0.0148
full reasoning
Candidates: Kf6 (Centralizes king escape; enables Rc1+ perpetual and best positioning to harass White king with rook coordination) | Kf7 (Flexible escape square; allows Rc1+ perpetual checks while keeping king near tactical action zone for rook activity) | Kh5 (Edge escape per strategic notes; maintains Rc1+ perpetual threat and forces White to deal with checking patterns despite cramped space)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kf6 — Centralizes king for active piece coordination; enables Rc1+ perpetual with best king positioning to harass White and prevent Ne7-d5 consolidation.. Rejected: g6f7, g6h5.
- llm.reflect22299ms · $0.0110
9. Commit Commit Kf6 (g6f6).
37.Nxc8Sonnet
1. Observe Halbzug 37, Weiss am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 25. 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-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. Use Ne7's tempo potential (Nd5+ check or Nxc8 capture) to either force the Black king onto worse squares or win the rook outright, simultaneously resolving the Bc4xf1 threat. After forcing Black's resp…
- llm.plan60911ms · $0.0396
full reasoning
Phase: middlegame. Use Ne7's tempo potential (Nd5+ check or Nxc8 capture) to either force the Black king onto worse squares or win the rook outright, simultaneously resolving the Bc4xf1 threat. After forcing Black's response, activate Bc1 and align both rooks on the e- or d-file against the exposed king. Convert the +8 material surplus by eliminating Black's sole counterplay (Bxf1) through immediate forcing moves, then cage the Black king with coordinated rooks and the knight outpost — per the open-file rooks heuristic, Ra1 and Rf1 belong on central open files to maximize pressure. Critical: Bc4xf1 is an immediate material threat — must be defused this move or answered with a larger counter-threat; Ne7 controls c8 (captures rook) and can jump to d5 giving check, forcing king displacement before Black can execute Bxf1; Black king on f6 is exposed — the weak-squares/outpost heuristic applies: knight on e7 or d5 is a permanent domination point with no pawn challenge possible; After forcing king movement, Bc1-e3 or Bc1-f4 neutralises the bishop threat and opens coordination between rooks; Black's queenside pawns (a7-c7) are all weak once White's rooks reach open central files — long-term winning targets.
6. Candidates Candidates: Nxc8 (Wins the rook outright (+5 material), eliminating Black's sole active piece and defusing Bxf1 threat by forcing recapture.) | Nd5+ (Gives check, forcing king displacement from f6 — weak-squares heuristi…
- chess.js.legal_moves0ms
- llm.candidates9862ms · $0.0039
full reasoning
Candidates: Nxc8 (Wins the rook outright (+5 material), eliminating Black's sole active piece and defusing Bxf1 threat by forcing recapture.) | Nd5+ (Gives check, forcing king displacement from f6 — weak-squares heuristic: Nd5 is dominant outpost with no pawn challenge possible.) | Bf4 (Neutralises the Bc4xf1 material threat immediately while developing the bishop to an active diagonal, enabling rook coordination on open files.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxc8 — Captures the rook outright (+5 material). After forced Bxf1 Kxf1, White retains Ra1+Nc8+Bc1 vs bare king and pawns — both threats resolved at maximum profit in one move.. Rejected: e7d5, c1f4.
- llm.reflect75743ms · $0.0689
9. Commit Commit Nxc8 (e7c8).
38...Bxf1Haiku
1. Observe Halbzug 38, Schwarz am Zug. Phase: Mittelspiel. Weiss +13 Punkte. Legale Zuege: 26. Criticality: 0.10. 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search4ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate bishop and king toward White's position (e.g., Kg5, Kf5, Be2-d3 lines). Advance queenside pawns preemptively (a5 or c5) to slow Rc1/Rb1 attacks. Generate any tactical complexity to force White ca…
- llm.plan41779ms · $0.0206
full reasoning
Phase: endgame. Activate bishop and king toward White's position (e.g., Kg5, Kf5, Be2-d3 lines). Advance queenside pawns preemptively (a5 or c5) to slow Rc1/Rb1 attacks. Generate any tactical complexity to force White calculation. Position is lost (rook down) — no winning chances. Only realistic goal is to delay inevitable while creating practical difficulty; reach theoretical drawn endgame positions (K+B vs K+N) if possible, or exploit White's precision requirements. Critical: White Ne7 is a dominant outpost — threatens Nd5, Nf5+, or Ng6; unbeatable centralization imminent; Black has no rook — perpetual checks impossible; must rely entirely on bishop and king; Queenside pawns (a7, b7, c7) face Rc1/Rb1 attacks — must advance (a5, b5, or c5) to reduce White's options; Black's Kf6 is exposed to Ne7-f5+ forcing retreat; king mobility will decrease if pushed.
6. Candidates Candidates: Bxf1 (Captures rook, forces White recapture, generates maximum tactical complexity and confusion) | Bxa2 (Activates bishop, gains material, removes White's queenside pawn shield protection) | Ke5 (Centralizes…
- chess.js.legal_moves0ms
- llm.candidates41293ms · $0.0247
full reasoning
Candidates: Bxf1 (Captures rook, forces White recapture, generates maximum tactical complexity and confusion) | Bxa2 (Activates bishop, gains material, removes White's queenside pawn shield protection) | Ke5 (Centralizes king toward White position, improves bishop-king coordination and tactical options)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxf1 — Rook hanging on f1. Capture it. Forces Kxf1, improves material deficit from two rooks down to one. Only forcing move in lost position.. Rejected: c4a2, f6e5.
- llm.reflect17373ms · $0.0064
9. Commit Commit Bxf1 (c4f1).
39.Kxf1Sonnet
1. Observe Halbzug 39, Weiss am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 22. 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-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. Relocate Nc8→e7 to threaten Nd5+ (knight outpost heuristic: d5 attacks f6 and c7 simultaneously). Block Bf1's g2-diagonal pressure before Black plays Bxg2. Then centralise Ra1 to d1 or e1 per the open-…
- llm.plan85385ms · $0.0681
full reasoning
Phase: middlegame. Relocate Nc8→e7 to threaten Nd5+ (knight outpost heuristic: d5 attacks f6 and c7 simultaneously). Block Bf1's g2-diagonal pressure before Black plays Bxg2. Then centralise Ra1 to d1 or e1 per the open-file-rooks heuristic — the d- and e-files are fully open and the Black king sits exposed on f6. Establish the knight on the d5 outpost (immune from pawns, attacks Kf6 and c7), park the rook on an open central file to dominate the board, then pick off Black's queenside pawns a7/b7/c7 with the knight while the rook covers escape squares — converting the +8 material edge cleanly. Critical: Bf1 threatens Bxg2 immediately — White cannot ignore it beyond one move; Nc8 must transit e7 → d5 to deliver check and lock in the outpost; Black has no perpetual check resources with a lone bishop — delay is the only counterplay; Ra1 belongs on d1 or e1 (open-file-rooks heuristic) once the e7 route is clear.
6. Candidates Candidates: Kxf1 (Captures free Black bishop on f1, eliminates immediate g2-diagonal threat, extends already decisive material edge.) | Ne7 (Routes knight toward d5 outpost; Nd5+ next delivers check while attacking c7 an…
- chess.js.legal_moves0ms
- llm.candidates37251ms · $0.0266
full reasoning
Candidates: Kxf1 (Captures free Black bishop on f1, eliminates immediate g2-diagonal threat, extends already decisive material edge.) | Ne7 (Routes knight toward d5 outpost; Nd5+ next delivers check while attacking c7 and f6 simultaneously per outpost heuristic.) | Bg5+ (Check forces Black king off f6, gains tempo and clears path for open-file rook centralization to d1 or e1.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxf1 — Captures the Black bishop on f1 for free in one move, immediately eliminating the Bxg2 diagonal threat while extending the decisive material edge. Maximum efficiency — no tempo wasted chasing what Kxf1…
- llm.reflect97460ms · $0.0830
full reasoning
Final pick: Kxf1 — Captures the Black bishop on f1 for free in one move, immediately eliminating the Bxg2 diagonal threat while extending the decisive material edge. Maximum efficiency — no tempo wasted chasing what Kxf1 achieves instantly.. Rejected: c8e7, c1g5.
9. Commit Commit Kxf1 (g1f1).
40...c5Haiku
1. Observe Halbzug 40, Schwarz am Zug. Phase: Mittelspiel. Weiss +11 Punkte. Legale Zuege: 15. Criticality: 0.10. 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Force pawn tension on queenside via c5 or a5 to activate Black's only counterplay. Keep king flexible toward center. Generate practical complexity despite material deficit. Advance queenside pawns while a…
- llm.plan37742ms · $0.0175
full reasoning
Phase: endgame. Force pawn tension on queenside via c5 or a5 to activate Black's only counterplay. Keep king flexible toward center. Generate practical complexity despite material deficit. Advance queenside pawns while activating king; force White's rook into defensive duty on the a/b/c files; minimize White's piece coordination through tactical pawn pressure. Critical: White Nc8 outpost is unbeatable—no piece trades available for Black; Pawn breaks (c5, a5) are Black's only forcing moves to create resistance; White Ra1 must eventually defend queenside—that is Black's sole tactical lever; Rook + Bishop down: drawing resistance and practical difficulty are the realistic goals.
6. Candidates Candidates: a5 (Direct queenside pawn break forces Ra1 into defense. Black's sole tactical lever.) | c5 (Central pawn break creates immediate tension, gains space, forces White reaction.) | Ke5 (Activates king toward cen…
- chess.js.legal_moves0ms
- llm.candidates22276ms · $0.0102
full reasoning
Candidates: a5 (Direct queenside pawn break forces Ra1 into defense. Black's sole tactical lever.) | c5 (Central pawn break creates immediate tension, gains space, forces White reaction.) | Ke5 (Activates king toward center, improves coordination to support queenside pawn breaks.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c5 — c5 creates central tension immediately (threatens c4), forces White response, keeps multiple pawn-break options (a5 follow-up), flexible vs. committed a5 alone.. Rejected: a7a5, f6e5.
- llm.reflect20319ms · $0.0076
9. Commit Commit c5 (c7c5).
41.Ne7Sonnet
1. Observe Halbzug 41, Weiss am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 23. 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_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Exploit Ne7+ immediately — the knight on c8 can check the Black king on f6 right now, forcing it backward before it stabilises. After the king retreats, land the knight on d5 (ideal outpost, immune from p…
- llm.plan53288ms · $0.0372
full reasoning
Phase: endgame. Exploit Ne7+ immediately — the knight on c8 can check the Black king on f6 right now, forcing it backward before it stabilises. After the king retreats, land the knight on d5 (ideal outpost, immune from pawns, attacks c7 and b6). Simultaneously begin centralising the White king toward e2-d3 per the opposition heuristic — seize direct opposition to cut off the Black king and prevent it reaching the queenside to escort its pawns. Convert the +11 advantage by establishing the knight permanently on d5, marching the White king to d4/e4 using opposition to confine the Black king, then activating the rook on the a-file to restrain the a7/b7 pawns — the rook-on-open-file principle (echoing active rook play from Lucena-type conversions) ensures Black's passed c5 and queenside cluster are picked off before any promotion becomes a real threat. Critical: Ne7+ is immediately playable — forces Black king off f6, gains tempo, and allows Nd5 on the very next move without counterplay; After Nd5, the knight is unassailable (no Black pawn can challenge it) and simultaneously pressures c7, b6, and f4 — Black has no constructive plan; Opposition heuristic: White king must march Kf1-e2-d3-e4 to oppose the Black king and prevent it sheltering behind the c5-pawn; the side with the more active king wins this material-up endgame trivially; Rook must leave a1 — either Ra5 to attack c5 directly or Ra1-d1 to dominate the central open file; passive rook placement is the only real way to allow Black drawing tricks.
6. Candidates Candidates: Ne7 (Immediate check forces Black king off f6; tempo gained allows Nd5 next — unassailable outpost per plan.) | Bg5+ (Alternative tempo-gaining check activates the bishop and disrupts Black king's coordinatio…
- chess.js.legal_moves0ms
- llm.candidates26236ms · $0.0215
full reasoning
Candidates: Ne7 (Immediate check forces Black king off f6; tempo gained allows Nd5 next — unassailable outpost per plan.) | Bg5+ (Alternative tempo-gaining check activates the bishop and disrupts Black king's coordination before centralising.) | Ke2 (Begins king march Kf1-e2-d3-e4 per opposition heuristic; centralises king to cut off Black king activity.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ne7 — Immediate check forces Black king off f6, gaining a free tempo. Next move Nd5 is unassailable (c5 pawn attacks d4/b4, not d5), creating a dominant outpost hitting c7, b6, f4 simultaneously — concrete tw…
- llm.reflect33258ms · $0.0233
full reasoning
Final pick: Ne7 — Immediate check forces Black king off f6, gaining a free tempo. Next move Nd5 is unassailable (c5 pawn attacks d4/b4, not d5), creating a dominant outpost hitting c7, b6, f4 simultaneously — concrete two-move forced improvement.. Rejected: c1g5, f1e2.
9. Commit Commit Ne7 (c8e7).
42...c4Haiku
1. Observe Halbzug 42, Schwarz am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 13. Criticality: 0.10. 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance queenside pawns (a5, c4, b5) to force White's rook into passive defense. Centralize king toward queenside to support pawn progression. Create practical resistance through pawn tension. Generate a …
- llm.plan22773ms · $0.0106
full reasoning
Phase: endgame. Advance queenside pawns (a5, c4, b5) to force White's rook into passive defense. Centralize king toward queenside to support pawn progression. Create practical resistance through pawn tension. Generate a passed queenside pawn while binding White's rook to defense; maintain king flexibility to support the advance; force White into precise execution despite material dominance. Critical: White's Ne7 is untouchable and dominates; no piece trades available for Black; Black's c5 pawn and potential a5/b5 advances are sole counterplay; White's Ra1 must defend queenside—this is Black's only tactical lever; King must support pawns from behind or alongside; flexibility toward center/queenside is critical.
6. Candidates Candidates: a5 (Forces rook into passive queenside defense, advances toward passed pawn goal.) | c4 (Creates immediate pawn tension, forces rook response. Core counterplay pressure.) | Ke5 (Centralizes king toward queens…
- chess.js.legal_moves0ms
- llm.candidates22424ms · $0.0100
full reasoning
Candidates: a5 (Forces rook into passive queenside defense, advances toward passed pawn goal.) | c4 (Creates immediate pawn tension, forces rook response. Core counterplay pressure.) | Ke5 (Centralizes king toward queenside as strategic plan demands. Supports pawn advances.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c4 — c4 creates immediate forcing pressure—threatens c3 in one move (promotion threat distance). Ra1 must blockade passively. More forcing than a5 which needs four moves to reach a1.. Rejected: a7a5, f6e5.
- llm.reflect17335ms · $0.0063
9. Commit Commit c4 (c5c4).
43.Nd5+Sonnet
1. Observe Halbzug 43, Weiss am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 25. Criticality: 0.10.
- 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_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Centralise the White king immediately (f1→e2→d3), invoking the opposition heuristic to cut off the Black king from the queenside. Simultaneously neutralise the c4 passer — the bishop diagonal c1-e3 or a m…
- llm.plan38399ms · $0.0279
full reasoning
Phase: endgame. Centralise the White king immediately (f1→e2→d3), invoking the opposition heuristic to cut off the Black king from the queenside. Simultaneously neutralise the c4 passer — the bishop diagonal c1-e3 or a march through d2 covers c4. Knight reorients from e7 toward d5 or c6 to attack a7/b7. Convert the overwhelming material advantage (+11) by stopping c4 from queening, seizing king opposition to confine the Black king to the kingside, then using the R+B+N trio to harvest the queenside pawns and advance White's own pawn majority. Critical: Black's c4 passer is the only real counterplay — it must be blockaded or captured before White focuses elsewhere; White king is passive on f1 and must centralise; opposition principle (memory heuristic) applies — White king heads to d3/d4 to cut Black king off from c4 escort duty; Knight on e7 is temporarily well-placed near g6/d5 but Black has no immediate threat; the rook on a1 is completely dormant and should enter via a-file or open files once king moves.
6. Candidates Candidates: Ke2 (King centralises toward d3; invokes opposition heuristic cutting Black king from c4 escort; activates rook.) | Nd5+ (Check forces king back; knight on d5 covers c3, eyes a6/b6 pawns, attacks queenside im…
- chess.js.legal_moves0ms
- llm.candidates21301ms · $0.0155
full reasoning
Candidates: Ke2 (King centralises toward d3; invokes opposition heuristic cutting Black king from c4 escort; activates rook.) | Nd5+ (Check forces king back; knight on d5 covers c3, eyes a6/b6 pawns, attacks queenside immediately.) | Be3 (Bishop blockades c4 passer on diagonal; stops promotion threat; frees king to march without counterplay risk.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nd5+ — Check forces Black king off f6; knight on d5 covers c3 directly, blocking the c4 passer's only advance route. Invokes active-piece-play heuristic: one move achieves check, passer control, and b6 attack…
- llm.reflect108410ms · $0.0844
full reasoning
Final pick: Nd5+ — Check forces Black king off f6; knight on d5 covers c3 directly, blocking the c4 passer's only advance route. Invokes active-piece-play heuristic: one move achieves check, passer control, and b6 attack simultaneously.. Rejected: f1e2, c1e3.
9. Commit Commit Nd5+ (e7d5).
44...Ke5Haiku
1. Observe Halbzug 44, Schwarz am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 5. Schach! Criticality: 0.55. 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Escape check while repositioning king toward queenside. Advance passed pawn to create promotion threat. Multiply queenside pawn advances to force White's rook into complete passive defense. Black trades c…
- llm.plan52239ms · $0.0253
full reasoning
Phase: endgame. Escape check while repositioning king toward queenside. Advance passed pawn to create promotion threat. Multiply queenside pawn advances to force White's rook into complete passive defense. Black trades counterplay tempo for White's material dominance. Create and drive multiple queenside passed pawns faster than White can defend, compensating for the material deficit through relentless pawn threats. Critical: White's Nd5 dominates center and gives check; king escape must maintain flexibility for queenside support; Black's advanced c4 pawn is the sole counterplay asset; must continue advancing without hesitation; White's Ra1 will be pinned entirely to queenside defense—this bind is Black's only practical lever; Material deficit (-11) is insurmountable without concrete pawn threats; every tempo matters; must avoid passive play.
6. Candidates Candidates: Ke5 (Centralizes king, directly supports queenside c4 pawn counterplay through center control, maintains maximum flexibility for repositioning) | Kf7 (Regroups toward queenside, preserves pawn-support options…
- chess.js.legal_moves0ms
- llm.candidates21270ms · $0.0088
full reasoning
Candidates: Ke5 (Centralizes king, directly supports queenside c4 pawn counterplay through center control, maintains maximum flexibility for repositioning) | Kf7 (Regroups toward queenside, preserves pawn-support options while avoiding kingside isolation, repositions for c-pawn backing) | Kf5 (Active centralization, moves king toward queenside theater where c4 passed pawn drives counterplay, maintains check-escape tempo)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke5 — Centralizes king maximally, one move from d4 or c5 to directly support c4 pawn's advance. Most flexible square for both queenside support and maintaining tempo against White's defensive bind.. Rejected:…
- llm.reflect24741ms · $0.0122
full reasoning
Final pick: Ke5 — Centralizes king maximally, one move from d4 or c5 to directly support c4 pawn's advance. Most flexible square for both queenside support and maintaining tempo against White's defensive bind.. Rejected: f6f7, f6f5.
9. Commit Commit Ke5 (f6e5).
45.Ke2Sonnet
1. Observe Halbzug 45, Weiss am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 27. 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_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. March White king f1→e2→d3 to threaten c4 directly and achieve distant opposition against the Black king on e5 (opposition heuristic: d3 vs e5 is the entry to the diagonal squeeze); simultaneously activate…
- llm.plan53303ms · $0.0361
full reasoning
Phase: endgame. March White king f1→e2→d3 to threaten c4 directly and achieve distant opposition against the Black king on e5 (opposition heuristic: d3 vs e5 is the entry to the diagonal squeeze); simultaneously activate the Rook from a1 to a5/a6 to attack a7 and b7; keep Nd5 anchored — it covers c3, neutralising the c4 passer's advance for now. Convert the overwhelming +11 material surplus by centralising the king to d3/c3 to devour the c4 pawn, then funneling R+B+N to harvest a7 and b7 while the Black king is denied the queenside via the opposition-based king race. Critical: c4 passer is currently covered on c3 by Nd5 — king must reach d3 before Black can engineer a c4-c3 push at a moment the knight moves; Opposition heuristic applies: White king to d3 mirrors e5 diagonally and begins the geometric squeeze — Black king cannot simultaneously defend c4 and contest the queenside; Rook on a1 is completely passive — first activation target is a5 to pin a7/b7 and threaten both queenside pawns; Bishop on c1 is locked behind its own pawn structure — route via d2 or e3 to reinforce coverage of c3 and free the king march.
6. Candidates Candidates: Ke2 (King marches toward d3, activating the opposition heuristic; begins the journey to devour c4 pawn.) | Bd2 (Activates the locked bishop via d2, reinforces c3 coverage so Nd5 can maneuver freely without al…
- chess.js.legal_moves0ms
- llm.candidates13392ms · $0.0038
full reasoning
Candidates: Ke2 (King marches toward d3, activating the opposition heuristic; begins the journey to devour c4 pawn.) | Bd2 (Activates the locked bishop via d2, reinforces c3 coverage so Nd5 can maneuver freely without allowing c4-c3.) | Rb1 (Rook activation — routes toward b-file or a5 to pressure passive a7/b7 pawns, ending complete rook passivity.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke2 — Ke2 begins the direct king march to d3, attacking c4 within two moves. Nd5 already covers c3 rendering Bd2 redundant; the king is the fastest piece to devour c4 while Black's king on e5 cannot intercept…
- llm.reflect25270ms · $0.0206
full reasoning
Final pick: Ke2 — Ke2 begins the direct king march to d3, attacking c4 within two moves. Nd5 already covers c3 rendering Bd2 redundant; the king is the fastest piece to devour c4 while Black's king on e5 cannot intercept.. Rejected: c1d2, a1b1.
9. Commit Commit Ke2 (f1e2).
46...Kd4Haiku
1. Observe Halbzug 46, Schwarz am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 15. Criticality: 0.10. 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Escape Nd5 check with Kd4 (centralizes toward c4). Push c3, then b5 + a5 together. Force White Rook to defend multiple threats at once—compensation is pawn-race tempo. Promote a queenside passed pawn befo…
- llm.plan34735ms · $0.0173
full reasoning
Phase: endgame. Escape Nd5 check with Kd4 (centralizes toward c4). Push c3, then b5 + a5 together. Force White Rook to defend multiple threats at once—compensation is pawn-race tempo. Promote a queenside passed pawn before White consolidates material advantage. Critical: Nd5 check forces Kd4 (best—supports c-pawn and reaches queenside faster); c4 + b7 + a7 pawns are the only counterplay; must push all three simultaneously to overload the Rook on a1; White King on e2 too far away; if Black gets c3 + b5 moving in the next 3 moves, Rook cannot defend both without allowing one through.
6. Candidates Candidates: Kd4 (Escapes check, centralizes King to support c3 push and queenside counterplay) | Kxd5 (Captures Knight, maximally centralizes King, removes tactical threat piece) | Ke4 (Centralizes toward queenside actio…
- chess.js.legal_moves0ms
- llm.candidates24715ms · $0.0119
full reasoning
Candidates: Kd4 (Escapes check, centralizes King to support c3 push and queenside counterplay) | Kxd5 (Captures Knight, maximally centralizes King, removes tactical threat piece) | Ke4 (Centralizes toward queenside action, maintains mobility for pawn support)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd4 — Centralizes King toward c4 pawn and queenside. Keeps Knight on board (complicates White's defense). Avoids premature simplification when down material.. Rejected: e5d5, e5e4.
- llm.reflect35256ms · $0.0169
9. Commit Commit Kd4 (e5d4).
47.Be3+Sonnet
1. Observe Halbzug 47, Weiss am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 29. 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-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. March Ke2→d3 to directly contest c4 and achieve adjacent king contact with Black king — referencing the opposition heuristic (memory hit #3), this forces Black king to concede. If c4→c3 follows, Nd5-c3 or…
- llm.plan43272ms · $0.0307
full reasoning
Phase: endgame. March Ke2→d3 to directly contest c4 and achieve adjacent king contact with Black king — referencing the opposition heuristic (memory hit #3), this forces Black king to concede. If c4→c3 follows, Nd5-c3 or Kxc3 recaptures. Simultaneously activate Ra1→a5→a6 to pressure a7/b7. Nd5 stays anchored: it covers c3 and b4, neutralising the passer. Convert the +11 material surplus by capturing c4 with the king or knight, then use R+B+N coordination to harvest a7 and b7 while denying Black's king any queenside counterplay — a technically trivial conversion once c4 falls. Critical: c4 passer: immediate priority — Nd5 covers c3 (Philidor/block principle from memory hit #1), but c4→c2 would be dangerous if White king delays; Ke2→d3 must happen now; Black king d4 activity: adjacent to c4 pawn, will escort it — White king on d3 creates direct king confrontation and denies Black king the queenside escape via c3; a7/b7 pawns: currently passive but if Black king breaks free they could run; Rook must reach a5/a6 within 3-4 moves to preemptively restrain them.
6. Candidates Candidates: Be3+ (Tempo check forces Black king off d4, disrupting c4 pawn protection — active piece play per Gen-0 directive, references opposition heuristic.) | Nc3 (Direct passer blockade (Philidor block principle): N…
- chess.js.legal_moves0ms
- llm.candidates118471ms · $0.0993
full reasoning
Candidates: Be3+ (Tempo check forces Black king off d4, disrupting c4 pawn protection — active piece play per Gen-0 directive, references opposition heuristic.) | Nc3 (Direct passer blockade (Philidor block principle): Nc3 stops c4-c3 immediately while maintaining piece coordination.) | Kd2 (Activates king toward queenside; builds toward eventual Kc1-b1 to approach c4 passer without adjacency illegal squares.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Be3+ — Check forces Black king off d4 (its ideal c4-passer escort square) for free. After king retreats, Ke2-d3 immediately contests c4 with adjacent king pressure — tempo gain plus bishop activation per Gen-…
- llm.reflect106107ms · $0.0834
full reasoning
Final pick: Be3+ — Check forces Black king off d4 (its ideal c4-passer escort square) for free. After king retreats, Ke2-d3 immediately contests c4 with adjacent king pressure — tempo gain plus bishop activation per Gen-0 active-piece directive.. Rejected: d5c3, e2d2.
9. Commit Commit Be3+ (c1e3).
48...Kxd5Haiku
1. Observe Halbzug 48, Schwarz am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 3. Schach! Criticality: 0.55. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search21ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Attack Rook on a1 with c4-c3, forcing it to respond. Immediately follow with b7-b5 and a7-a5 to create dual promotion threats. White's pieces are spread (King e2, Knight d5, Bishop e3)—Rook cannot defend …
- llm.plan34720ms · $0.0171
full reasoning
Phase: endgame. Attack Rook on a1 with c4-c3, forcing it to respond. Immediately follow with b7-b5 and a7-a5 to create dual promotion threats. White's pieces are spread (King e2, Knight d5, Bishop e3)—Rook cannot defend both lanes simultaneously. Force material tradeoffs in Black's favor. Drive a queenside passed pawn to promotion by overloading the Rook's defense with pawn breaks on consecutive moves. Critical: Rook on a1 is the sole stopper; two advancing pawns force its paralysis; Black King on d4 actively supports b- and a-pawns, controls critical squares; White Knight and Bishop are not immediate threats to pawn queening—Knight/Bishop cannot help Rook reach promotion squares fast enough; Win threshold: if c3 + b5 both move within 2 turns, Rook must choose—one pawn runs through.
6. Candidates Candidates: Kxd5 (Removes Knight, sole defender. King on d5 directly supports c3 advance. Rook paralyzed choosing between queenside pawns.) | Ke5 (King activation toward center. Supports future c3 + b5 breaks. Knight rem…
- chess.js.legal_moves0ms
- llm.candidates25249ms · $0.0112
full reasoning
Candidates: Kxd5 (Removes Knight, sole defender. King on d5 directly supports c3 advance. Rook paralyzed choosing between queenside pawns.) | Ke5 (King activation toward center. Supports future c3 + b5 breaks. Knight remains; less forcing but keeps options.) | Ke4 (Aggressive centralization. Threatens f2, adds pressure. Supports c-pawn indirectly; least direct to dual-threat queenside plan.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxd5 — Captures Knight—removes White's sole active defender. King on d5 perfectly supports c3 advance and upcoming b5+a5 breaks. Rook alone cannot stop dual promotion threats.. Rejected: d4e5, d4e4.
- llm.reflect26738ms · $0.0123
9. Commit Commit Kxd5 (d4d5).
49.Bxa7Sonnet
1. Observe Halbzug 49, Weiss am Zug. Phase: Endspiel. Weiss +8 Punkte. Legale Zuege: 31. Criticality: 0.10.
- 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_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. March Ke2→d3 to seize direct opposition against Kd5 (memory hit #3: opposition forces Black king off d5), then capture c4. Simultaneously leverage Be3's long diagonal (e3-d4-c5-b6-a7) to pressure a7 — mem…
- llm.plan47831ms · $0.0353
full reasoning
Phase: endgame. March Ke2→d3 to seize direct opposition against Kd5 (memory hit #3: opposition forces Black king off d5), then capture c4. Simultaneously leverage Be3's long diagonal (e3-d4-c5-b6-a7) to pressure a7 — memory hit #3 confirms centralised king opposition as the lever to unlock the queenside. Activate Ra1 to the a-file targeting a7/b7 once c4 falls. Eliminate the c4 passer with the king while bishop covers a7 on the long diagonal and rook harvests the b7/a7 pawns — converting the R+B surplus into a technically trivial promotion race that Black cannot survive. Critical: c4 advancing to c3 before king arrives at d3; Black king staying active on d5 to defend the passer; rook passive on a1 — must reach the a- or b-file quickly; Be3→d4 tempo-gaining block if c4-c3 occurs before Kxc4.
6. Candidates Candidates: Bxa7 (Wins pawn immediately; bishop on long diagonal (heuristic #3: diagonal pressure on a7 unlocks queenside). b7 now exposed.) | Kd2 (King marches toward c3 (d3 is attacked by c4 pawn); heuristic #3: centra…
- chess.js.legal_moves0ms
- llm.candidates49845ms · $0.0392
full reasoning
Candidates: Bxa7 (Wins pawn immediately; bishop on long diagonal (heuristic #3: diagonal pressure on a7 unlocks queenside). b7 now exposed.) | Kd2 (King marches toward c3 (d3 is attacked by c4 pawn); heuristic #3: centralised king opposition is the lever to capture c4.) | Rd1+ (Forcing check displaces Black king from d5; heuristic #3: opposition forces Kd5 away, granting White tempo to approach c4.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxa7 — Wins pawn immediately; bishop on long diagonal (heuristic #3: diagonal pressure on a7 unlocks queenside). b7 now exposed.. Rejected: e2d2, a1d1. [LLM note: Claude CLI subprocess timed out after 120000m…
full reasoning
Final pick: Bxa7 — Wins pawn immediately; bishop on long diagonal (heuristic #3: diagonal pressure on a7 unlocks queenside). b7 now exposed.. Rejected: e2d2, a1d1. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Bxa7 (e3a7).
50...c3Haiku
1. Observe Halbzug 50, Schwarz am Zug. Phase: Endspiel. Weiss +9 Punkte. Legale Zuege: 12. Criticality: 0.10. 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search12ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Push c4-c3 immediately to force White's Rook into reactive defense. Follow with c2 to create unstoppable promotion threat. Support pawn advance with King from d5, controlling key squares. White Rook alone…
- llm.plan25844ms · $0.0120
full reasoning
Phase: endgame. Push c4-c3 immediately to force White's Rook into reactive defense. Follow with c2 to create unstoppable promotion threat. Support pawn advance with King from d5, controlling key squares. White Rook alone cannot blockade both pawn and King; forces material sacrifice or concession. Force White's Rook into sacrificial decisions by advancing the c-pawn relentlessly. Black's passed pawn is the sole winning asset; promotion threat is the only path to victory. Critical: Rook a1 is sole defender against c-pawn; c4 pawn is Black's only concrete asset; King d5 optimally placed to support advance; Tempo critical: c3 forces immediate Rook response; White Bishop e3 cannot defend c-lane alone.
6. Candidates Candidates: c3 (Forces Rook blockade, threatens c2-c1=Q, only winning try against Rook+pawns) | Ke4 (Activates King to support pawn, controls d3/e3 after c3-c2 advance) | Ke5 (Centralizes King, supports c-pawn advance, p…
- chess.js.legal_moves0ms
- llm.candidates25738ms · $0.0124
full reasoning
Candidates: c3 (Forces Rook blockade, threatens c2-c1=Q, only winning try against Rook+pawns) | Ke4 (Activates King to support pawn, controls d3/e3 after c3-c2 advance) | Ke5 (Centralizes King, supports c-pawn advance, prepares Ke4 on next moves)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c3 — c3 immediately forces White's Rook to blockade at c1, paralyzing the only defender. Threatens unstoppable c2-c1=Q next move. Only forcing move.. Rejected: d5e4, d5e5.
- llm.reflect25275ms · $0.0081
9. Commit Commit c3 (c4c3).
51.bxc3Sonnet
1. Observe Halbzug 51, Weiss am Zug. Phase: Endspiel. Weiss +9 Punkte. Legale Zuege: 29. 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_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Execute Ke2→d3 immediately — king on d3 controls c2 AND threatens Kxc3, choking the c3 passer. If Black plays Kd5→Kc4 to shield the pawn, Ra1→a4+ drives the king off the c-file, then Kxc3. Bishop on a7 an…
- llm.plan64900ms · $0.0496
full reasoning
Phase: endgame. Execute Ke2→d3 immediately — king on d3 controls c2 AND threatens Kxc3, choking the c3 passer. If Black plays Kd5→Kc4 to shield the pawn, Ra1→a4+ drives the king off the c-file, then Kxc3. Bishop on a7 anchors the d4-c5-b6 diagonal, denying Black king a flanking route. Eliminate the c3 passer with the king, then rook + bishop harvest b7 and escort White's queenside pawns (a2/b2) to promotion — a technically won R+B vs bare pawns conversion. Critical: c3 pawn threatens c2 — stop it this move via Kd3 (controls c2); Black Kd5→Kc4 shields c3 — Ra4+ displaces the king (memory: opposition forces re-route); Ba7's long diagonal (b6-c5-d4) blocks Black king from flanking west after rook check; After c3 falls White a2/b2 advance becomes unstoppable with rook support.
6. Candidates Candidates: Kd3 (Plan's primary move: king covers c2 square, directly threatens Kxc3 to eliminate the dangerous passer.) | bxc3 (Immediately captures the c3 passer; removes the promotion threat and opens b-file for rook …
- chess.js.legal_moves0ms
- llm.candidates24757ms · $0.0182
full reasoning
Candidates: Kd3 (Plan's primary move: king covers c2 square, directly threatens Kxc3 to eliminate the dangerous passer.) | bxc3 (Immediately captures the c3 passer; removes the promotion threat and opens b-file for rook activity.) | Bd4 (Plan explicitly anchors b6-c5-d4 diagonal; Bd4 blocks Black king from flanking west while eyeing c3.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: bxc3 — Immediately eliminates the only Black winning threat in one move. White gains a pawn; Black's three kingside pawns vs R+B+five pawns is trivially won without any multi-step king-march calculation or ri…
- llm.reflect63261ms · $0.0501
full reasoning
Final pick: bxc3 — Immediately eliminates the only Black winning threat in one move. White gains a pawn; Black's three kingside pawns vs R+B+five pawns is trivially won without any multi-step king-march calculation or risk.. Rejected: e2d3, a7d4.
9. Commit Commit bxc3 (b2c3).
52...Kc4Haiku
1. Observe Halbzug 52, Schwarz am Zug. Phase: Endspiel. Weiss +10 Punkte. Legale Zuege: 12. 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Centralize King via Kc4 to attack the weak c3 pawn, then push b5 to create passing threats and force White into reactive defense. Seize the initiative despite severe material deficit. Create a passed b-pa…
- llm.plan41227ms · $0.0224
full reasoning
Phase: endgame. Centralize King via Kc4 to attack the weak c3 pawn, then push b5 to create passing threats and force White into reactive defense. Seize the initiative despite severe material deficit. Create a passed b-pawn through King-supported advances (b5-b4), forcing White's Rook away from blockading, and extract maximum practical value in a position where Black's only drawing/winning chance is to establish an unstoppable passer. Critical: c3 pawn vulnerable to Kc4 attack—White must respond; b7 pawn becomes dangerous with King support; b5 threatens c3 again; White's Ba7 out of play; Rook tied to stopping queenside threats; Black needs to move immediately; every delay strengthens White's distant-King advantage.
6. Candidates Candidates: Kc4 (Attacks weak c3 pawn directly, centralizes King per plan, forces immediate White response) | b5 (Creates dangerous passed pawn threat on queenside, forces White into reactive defense) | Ke5 (Improves Kin…
- chess.js.legal_moves0ms
- llm.candidates18398ms · $0.0092
full reasoning
Candidates: Kc4 (Attacks weak c3 pawn directly, centralizes King per plan, forces immediate White response) | b5 (Creates dangerous passed pawn threat on queenside, forces White into reactive defense) | Ke5 (Improves King centralization, maintains flexibility to support queenside threats next move)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kc4 — Directly attacks c3 pawn, forces immediate White response, centralizes King per plan. Most forcing move. If Ra3, b5 follows with supported passer. If c4, King optimally placed.. Rejected: b7b5, d5e5.
- llm.reflect17786ms · $0.0080
9. Commit Commit Kc4 (d5c4).
53.Bd4Sonnet
1. Observe Halbzug 53, Weiss am Zug. Phase: Endspiel. Weiss +10 Punkte. Legale Zuege: 26. 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_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Evict Black king from c4 via rook activation (Ra4+), seize king opposition against the retreating Black king, then capture b7 with the bishop or rook and begin marching the a2 passer under rook escort. Co…
- llm.plan67428ms · $0.0529
full reasoning
Phase: endgame. Evict Black king from c4 via rook activation (Ra4+), seize king opposition against the retreating Black king, then capture b7 with the bishop or rook and begin marching the a2 passer under rook escort. Convert the crushing material edge (R+B+4 pawns vs 3 isolated pawns) by displacing the Black king from its active c4 post with tempo, then harvesting b7 and promoting a2 before Black's kingside pawns become relevant. Critical: Black king on c4 threatens Kxc3 immediately — White must force it off the c-file this move or next; Bishop on a7 freezes b7 but is otherwise passive — Ra4+ activates the rook with check and does the displacement work; Opposition heuristic: after the rook check drives the Black king back (e.g. to d3 or b3), White king advances and seizes opposition to restrict the Black king further, preventing it from re-entering the queenside; Black's g7/h7 pawns are a distant counter-threat only if White allows the Black king to escape — rook must cut off the king on the a/b-file while bishop holds the a7-d4 diagonal.
6. Candidates Candidates: Bd4 (Bishop activates to central diagonal, attacks c3 defense and eyes b6/a7 pawn harvest routes.) | a4 (Advances the passer immediately, escorted later by rook; creates unstoppable promotion threat.)
- chess.js.legal_moves0ms
- llm.candidates9376ms · $0.0034
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bd4 — Bd4 defends c3 diagonally (bishop on d4 attacks c3, so Kxc3 is illegal — king walks into check), AND clears a7 for the a-pawn's promotion path. Two critical gains in one move.. Rejected: a2a4.
- llm.reflect84878ms · $0.0585
9. Commit Commit Bd4 (a7d4).
54...b5Haiku
1. Observe Halbzug 54, Schwarz am Zug. Phase: Endspiel. Weiss +10 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_search15ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Push b5 to threaten c3 and create a passed b-pawn on the next move. Force White's Rook to choose between blockading the passed pawn or defending the c3 pawn. Use the active King on c4 to support the b-paw…
- llm.plan18225ms · $0.0068
full reasoning
Phase: endgame. Push b5 to threaten c3 and create a passed b-pawn on the next move. Force White's Rook to choose between blockading the passed pawn or defending the c3 pawn. Use the active King on c4 to support the b-pawn's advance and extract maximum practical play from a lost position. Establish an unstoppable passed b-pawn (b5-b4-b3) with King support, forcing White's Rook into passive blockading and maintaining tactical threats to the c3 pawn until White seals the position. Critical: c3 pawn is attacked and weak—White must defend or lose it; Kxc3 is constant threat; b5-b4 sequence forces Rook into blockade, removing it from active play; White's Ra1 will be tied down; Philidor principle: once b-pawn reaches 6th rank (b3), White must switch Rook to back-rank defense; timing is key; King opposition: Black's King on c4 must maintain pressure while supporting b-pawn—one tempo slip and White consolidates; White's Ba7 placement (if it goes there) is irrelevant if b-pawn becomes passed; tempo and King activity decide.
6. Candidates Candidates: b5 (Advance passed b-pawn with tempo. Threatens b4 next, forces White Rook into blockade, removes it from active play.) | Kb5 (King to b5 escorts b-pawn advance. Maintains active placement, supports pawn esco…
- chess.js.legal_moves0ms
- llm.candidates21235ms · $0.0096
full reasoning
Candidates: b5 (Advance passed b-pawn with tempo. Threatens b4 next, forces White Rook into blockade, removes it from active play.) | Kb5 (King to b5 escorts b-pawn advance. Maintains active placement, supports pawn escort sequence, keeps White under pressure.) | Kd5 (Centralize King to d5. Maintains flexibility, keeps c3 weak under observation, prepares kingside pawn support options.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: b5 — Immediately forces White's Rook into passive blockade duty. Threatens unstoppable b4 next move. Creates tempo and removes White's Rook from active play—critical in Rook endgames where Black's only winnin…
- llm.reflect23409ms · $0.0110
full reasoning
Final pick: b5 — Immediately forces White's Rook into passive blockade duty. Threatens unstoppable b4 next move. Creates tempo and removes White's Rook from active play—critical in Rook endgames where Black's only winning chance lies in a quickly-advancing passed b-pawn supported by the active King.. Rejected: c4b5, c4d5.
9. Commit Commit b5 (b7b5).
55.a4Sonnet
1. Observe Halbzug 55, Weiss am Zug. Phase: Endspiel. Weiss +10 Punkte. Legale Zuege: 28. 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_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Evict the Black king from c4 with Ra4+ (tempo), then centralize the White king toward d3/d4 to claim opposition against the retreating Black king per the Opposition heuristic — shadowing it so it cannot r…
- llm.plan79279ms · $0.0599
full reasoning
Phase: endgame. Evict the Black king from c4 with Ra4+ (tempo), then centralize the White king toward d3/d4 to claim opposition against the retreating Black king per the Opposition heuristic — shadowing it so it cannot return to c4. Next, harvest the b5 pawn and escort a2 toward promotion under rook cover. Convert the crushing material edge by displacing Black's only active piece (its king) with a forcing rook check, then use king opposition to keep it on the back foot while the bishop freezes b5 and the rook escorts the a-passer — the Lucena bridge pattern guides rook-and-pawn promotion once Black's king is cut off from the queening file. Critical: Ra4+ is the only forcing move — Black king must abandon c4 immediately; After Kb3: Ra3+ or Kd3 maintains pressure and blocks king re-entry to c4; After Kd5: Ke3 achieves direct king opposition, denying d4/c5 to Black king; Bishop on d4 defends c3 pawn passively — do NOT move it until king opposition is secured; Black g7/h7 pawns are 4+ moves from promotion and pose no near-term threat.
6. Candidates Candidates: Ke3 (Centralizes king toward d3/d4 per Opposition heuristic; shadows Black king, blocking its re-entry routes while supporting the a-passer.) | a4 (Advances the a-passer immediately, pressuring b5 and activat…
- chess.js.legal_moves0ms
- llm.candidates66270ms · $0.0526
full reasoning
Candidates: Ke3 (Centralizes king toward d3/d4 per Opposition heuristic; shadows Black king, blocking its re-entry routes while supporting the a-passer.) | a4 (Advances the a-passer immediately, pressuring b5 and activating the Lucena rook-escort plan; forces Black to react.) | Bxg7 (Captures an undefended pawn, eliminating Black's g7 counterplay; heuristic-suggested tempo gain with material edge.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: a4 — Forces an immediate crisis: after bxa4 the reply Rxa4+ evicts the Black king from c4 with tempo (the plan's core idea via forcing line); after b4 then cxb4 produces an advanced passed b-pawn. Advances th…
- llm.reflect36950ms · $0.0269
full reasoning
Final pick: a4 — Forces an immediate crisis: after bxa4 the reply Rxa4+ evicts the Black king from c4 with tempo (the plan's core idea via forcing line); after b4 then cxb4 produces an advanced passed b-pawn. Advances the primary winning asset with concrete threats rather than maneuvering.. Rejected: e2e3, d4g7.
9. Commit Commit a4 (a2a4).
56...b4Haiku
1. Observe Halbzug 56, Schwarz am Zug. Phase: Endspiel. Weiss +10 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_search17ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance the b-pawn while keeping pressure on White's weak c3. Force Rook into passive blockade, trade spatial advantage against material deficit. Push b-pawn toward promotion (b4→b3→b2) with King support.…
- llm.plan30313ms · $0.0135
full reasoning
Phase: endgame. Advance the b-pawn while keeping pressure on White's weak c3. Force Rook into passive blockade, trade spatial advantage against material deficit. Push b-pawn toward promotion (b4→b3→b2) with King support. Force White's Rook into permanent blockading role, exploiting perpetual weakness of c3 to maintain tactical threats in an objectively lost position. Critical: c3 pawn under constant attack—must remain a threat to dictate White's moves; b-pawn advance with Kc4 support forces White's Rook to choose: defend c3 or blockade pawn; If cxb4+, then Kxb4 gives Black's King dangerous central proximity and activation leverage.
6. Candidates Candidates: b4 (Attacks c3 directly, forces White decision; if cxb4+ then Kxb4 gains King activity) | Kb3 (King supports b-pawn advance with b4-b3 sequence; pressures c3 from behind) | Kd5 (Centralizes King toward White'…
- chess.js.legal_moves0ms
- llm.candidates27269ms · $0.0127
full reasoning
Candidates: b4 (Attacks c3 directly, forces White decision; if cxb4+ then Kxb4 gains King activity) | Kb3 (King supports b-pawn advance with b4-b3 sequence; pressures c3 from behind) | Kd5 (Centralizes King toward White's position; flexible, maintains b-pawn push option)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: b4 — Attacks c3 directly, forces White's decision: if cxb4+ then Kxb4 activates King centrally; if White preserves c3, b-pawn advances. Most forcing, dictates opponent's replies.. Rejected: c4b3, c4d5.
- llm.reflect16737ms · $0.0082
9. Commit Commit b4 (b5b4).
57.cxb4Sonnet
1. Observe Halbzug 57, Weiss am Zug. Phase: Endspiel. Weiss +10 Punkte. Legale Zuege: 30. 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. Continue the Ra4+ tempo sequence from the previous plan: drive the Black king off c4, advance White king to d3/d4 using the Opposition heuristic to shadow the retreating Black king, then bishop guards b4 …
- llm.plan26278ms · $0.0170
full reasoning
Phase: endgame. Continue the Ra4+ tempo sequence from the previous plan: drive the Black king off c4, advance White king to d3/d4 using the Opposition heuristic to shadow the retreating Black king, then bishop guards b4 while king and rook coordinate to harvest the b-pawn and push the a-passer toward promotion. Exploit the +10 material edge by first evicting Black's only active piece (its king on c4) with a rook check, then applying king opposition to keep it passive while the bishop freezes b4 and the rook escorts the a-pawn — the Lucena bridge pattern closes the game once the a-passer reaches a7 with the White king sheltered in front. Critical: Black king on c4 is dangerously active — it directly eyes c3 and b4; Ra4+ is the forcing tempo that ends this activity immediately; After Ra4+ Black king retreats to b3 or b5; White king must head to d3 to seize the Opposition and prevent king re-entry to c4; Black's g7/h7 pawns are dormant but must not be ignored — once White king is centralized, a bishop tempo covers the kingside while the rook promotes the a-file.
6. Candidates Candidates: cxb4 (Eliminates Black's b4 pawn and creates connected a4+b4 passers; per material-advantage heuristic, denies Black king its b4 anchor.) | Bxg7 (Wins Black's dormant g7 pawn per material-gain heuristic; remo…
- chess.js.legal_moves0ms
- llm.candidates113923ms · $0.0949
full reasoning
Candidates: cxb4 (Eliminates Black's b4 pawn and creates connected a4+b4 passers; per material-advantage heuristic, denies Black king its b4 anchor.) | Bxg7 (Wins Black's dormant g7 pawn per material-gain heuristic; removes kingside counterplay before escorting the a-passer toward promotion.) | Be5 (Centralizes bishop per bishop-coordination heuristic; covers f6-g7 diagonal and d6, preparing rook-bishop Lucena bridge as a-pawn advances.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: cxb4 — Eliminates Black's only advanced pawn and creates connected a4+b4 passers. Even after Kxb4, Ra4+ immediately evicts the king; the a-passer then marches with rook escort. The c3 pawn disappears so Black…
- llm.reflect92907ms · $0.0707
full reasoning
Final pick: cxb4 — Eliminates Black's only advanced pawn and creates connected a4+b4 passers. Even after Kxb4, Ra4+ immediately evicts the king; the a-passer then marches with rook escort. The c3 pawn disappears so Black king can no longer threaten Kxc3.. Rejected: d4g7, d4e5.
9. Commit Commit cxb4 (c3b4).
58...Kxb4Haiku
1. Observe Halbzug 58, Schwarz am Zug. Phase: Endspiel. Weiss +11 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_search18ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Invade queenside with King (Kb3 next) to attack a4/b4 pawns and force Rook into passive defense. Unblock b7 pawn if possible. Create tactical pressure despite R+B deficit. King harassment on a3/b3 to tie …
- llm.plan28758ms · $0.0115
full reasoning
Phase: endgame. Invade queenside with King (Kb3 next) to attack a4/b4 pawns and force Rook into passive defense. Unblock b7 pawn if possible. Create tactical pressure despite R+B deficit. King harassment on a3/b3 to tie down White's pieces; dislodge b4 pawn so b7 can advance; survival through perpetual practical complications in objectively lost position. Critical: b7 pawn blocked by b4—this is the only promotion asset; Rook checks will restrict King mobility; Black King is most active piece—must exploit centrality; White's R+B coordination dominates, but Rook must stay reactive if King invades.
6. Candidates Candidates: Kxd4 (Captures undefended Bishop, removes key attacking piece and reduces White's advantage.) | Kxb4 (Invades queenside, captures pawn, threatens a4 next. King actively placed for pressure.) | Kb3 (Attacks b4…
- chess.js.legal_moves0ms
- llm.candidates43820ms · $0.0227
full reasoning
Candidates: Kxd4 (Captures undefended Bishop, removes key attacking piece and reduces White's advantage.) | Kxb4 (Invades queenside, captures pawn, threatens a4 next. King actively placed for pressure.) | Kb3 (Attacks b4 pawn, forces White's defensive response. Maintains tactical pressure on queenside.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxb4 — Invades queenside, captures the b4 blockade, and unblocks the b7 pawn to advance. Creates concrete passed-pawn threat (b6-b5-b4) and forces Rook into reactive defense.. Rejected: c4d4, c4b3.
- llm.reflect36906ms · $0.0172
9. Commit Commit Kxb4 (c4b4).
59.Rb1+Sonnet
1. Observe Halbzug 59, Weiss am Zug. Phase: Endspiel. Weiss +10 Punkte. Legale Zuege: 32. 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. Black king on b4 directly attacks the a4-pawn — deflect it immediately with Rb1+ (tempo), then push a5 to create a protected passer, escort pawn with rook behind it (Philidor rook-behind-pawn pattern) whi…
- llm.plan46354ms · $0.0331
full reasoning
Phase: endgame. Black king on b4 directly attacks the a4-pawn — deflect it immediately with Rb1+ (tempo), then push a5 to create a protected passer, escort pawn with rook behind it (Philidor rook-behind-pawn pattern) while bishop controls the b5/c6 diagonal to block king re-entry. Force the a-pawn to a8 via Rb1+ deflection → a5 push → king advance to d3/d4 using opposition to shadow the retreating Black king, then build the Lucena bridge once the a-pawn reaches a7 to guarantee promotion against Black's passive kingside pawns. Critical: Black king on b4 is attacking the a4-pawn — must be addressed this move or pawn is lost; Rb1+ is the only forcing deflection: king must leave b4, exposing a4; After king retreats (Ka3/Ka5/Kc3/Kc5), push a5 immediately before king can return; Bishop on d4 is well-placed to cover b6 and prevent Black king from shadowing the passer; Black g7/h7 pawns are harmless — King e2 need not rush to defend kingside.
6. Candidates Candidates: Rb1+ (Forces Black king off b4, deflecting the a4-pawn attacker with tempo — key to the Rb1+/a5 plan.) | a5 (Immediately advances the protected passer; bishop on d4 covers b6, preventing king re-entry.) | Bc5…
- chess.js.legal_moves0ms
- llm.candidates8977ms · $0.0036
full reasoning
Candidates: Rb1+ (Forces Black king off b4, deflecting the a4-pawn attacker with tempo — key to the Rb1+/a5 plan.) | a5 (Immediately advances the protected passer; bishop on d4 covers b6, preventing king re-entry.) | Bc5+ (Check deflects Black king from b4 with tempo, indirectly protecting a4 while gaining a move.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rb1+ — Deflects Black king from b4 with tempo; rook lands on b1 ready to answer Ka5 with Rb5+, keeping a4 covered while enabling the immediate a5 push after king retreats to a3/c3/c4.. Rejected: a4a5, d4c5.
- llm.reflect86898ms · $0.0692
9. Commit Commit Rb1+ (a1b1).
60...Ka5Haiku
1. Observe Halbzug 60, Schwarz am Zug. Phase: Endspiel. Weiss +10 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_search10ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Ka3 or Ka5 to attack a4 pawn, force rook defense; maximize king harassment to tie down White pieces; prepare g7-g5 pawn advance. King activity sole asset against R+B+3P. Rook+Bishop dominance ensures loss…
- llm.plan56303ms · $0.0313
full reasoning
Phase: endgame. Ka3 or Ka5 to attack a4 pawn, force rook defense; maximize king harassment to tie down White pieces; prepare g7-g5 pawn advance. King activity sole asset against R+B+3P. Rook+Bishop dominance ensures loss without perpetual king threats and complications. Critical: Rook controls b-file, restricts king mobility; Bishop locks squares c3, c5, e3; a4 pawn isolated but rook-defended; Black king centrality is only survival weapon.
6. Candidates Candidates: Ka5 (Attacks a4 pawn directly, forces rook defense per plan, maintains king activity while tying White's rook. Aligns with 'force rook defense' strategy.) | Kc4 (Centralizes king toward the middle, improves s…
- chess.js.legal_moves0ms
- llm.candidates26218ms · $0.0109
full reasoning
Candidates: Ka5 (Attacks a4 pawn directly, forces rook defense per plan, maintains king activity while tying White's rook. Aligns with 'force rook defense' strategy.) | Kc4 (Centralizes king toward the middle, improves sole tactical asset (king activity). Flexible for future a5-response or pawn advances when white commits.) | Ka3 (Alternative approach to attack a4 pawn from flank. Forces rook commitment but slightly less central than Ka5; keeps king harassment pressure alive.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ka5 — Attacks a4 directly, forces rook defense (Ra1 or Rb5), ties down White's rook. Maintains king flexibility to infiltrate via Kc4/Kc5 next move.. Rejected: b4c4, b4a3.
- llm.reflect55434ms · $0.0293
9. Commit Commit Ka5 (b4a5).
61.Rb5+Sonnet
1. Observe Halbzug 61, Weiss am Zug. Phase: Endspiel. Weiss +10 Punkte. Legale Zuege: 37. Criticality: 0.10.
- 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: endgame. Deflect Black king from a5 via Rb5+ check, then push a5 to create an unstoppable protected passer. Use bishop on d4 to cover b6/c6 diagonal and cut off king re-entry. King marches to d3-c4 to escort pawn …
- llm.plan39903ms · $0.0271
full reasoning
Phase: endgame. Deflect Black king from a5 via Rb5+ check, then push a5 to create an unstoppable protected passer. Use bishop on d4 to cover b6/c6 diagonal and cut off king re-entry. King marches to d3-c4 to escort pawn with opposition advantage. Force the a-pawn to promotion via rook-behind-pawn (Philidor pattern on advance, Lucena bridge-build once pawn reaches a7) while bishop seals off the Black king's return path and White king shadows via opposition. Critical: Black king on a5 directly attacks and blocks the a4-pawn — deflection is the immediate tactical priority before the pawn is captured; Memory hit [ENDGAME lucena rook]: once a-pawn reaches a7, build the Lucena bridge — rook cuts off Black king laterally, bishop guards promotion square; Memory hit [ENDGAME philidor rook]: rook stays behind the passer as it advances; only switch to front-check pattern if Black rook appears (no Black rook here, so pure escort); Bishop on d4 controls b6/c5/e5 — prevents Black king from using b6 as a re-entry corridor after deflection; Black kingside pawns on g7/h7 are harmless and passive; White's f2/g2/h2 majority is a secondary winning trump if needed.
6. Candidates Candidates: Rb5+ (Plan-stated deflection: forces Black king off a5, freeing a4 to advance; rook on 5th rank ideal for Philidor escort.) | Bb6+ (Check deflects king while placing bishop on b6 — directly sealing the king's…
- chess.js.legal_moves0ms
- llm.candidates71787ms · $0.0569
full reasoning
Candidates: Rb5+ (Plan-stated deflection: forces Black king off a5, freeing a4 to advance; rook on 5th rank ideal for Philidor escort.) | Bb6+ (Check deflects king while placing bishop on b6 — directly sealing the king's re-entry corridor per plan heuristic.) | Bc3+ (Check drives king from a5 allowing a5 push; bishop on c3 covers b4/a5 diagonal, limiting king's return squares.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rb5+ — Rb5+ deflects Black king from a5 while simultaneously placing rook on the ideal 5th-rank escort square; after Ka6/Ka4, White pushes a5 and the rook on b5 covers a5 via the rank (preventing recapture), …
- llm.reflect105412ms · $0.0847
full reasoning
Final pick: Rb5+ — Rb5+ deflects Black king from a5 while simultaneously placing rook on the ideal 5th-rank escort square; after Ka6/Ka4, White pushes a5 and the rook on b5 covers a5 via the rank (preventing recapture), bishop on d4 retains diagonal control of b6/c5 for free — one move achieves deflection + optimal rook placement.. Rejected: d4b6, d4c3.
9. Commit Commit Rb5+ (b1b5).
62...Kxa4Haiku
1. Observe Halbzug 62, Schwarz am Zug. Phase: Endspiel. Weiss +10 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_search7ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Maximize King activity against White's advanced pawns; exploit piece coordination weaknesses; prepare counterplay with g7/h7 pawn advances to disrupt White's control. Overwhelming material disadvantage de…
- llm.plan57735ms · $0.0312
full reasoning
Phase: endgame. Maximize King activity against White's advanced pawns; exploit piece coordination weaknesses; prepare counterplay with g7/h7 pawn advances to disrupt White's control. Overwhelming material disadvantage demands perpetual piece pressure and concrete threats to create drawing chances; passive defense leads to swift loss. Critical: White's passed a-pawn is the critical winning asset; Black King must engage directly and maintain pressure without overextending; Rook on b5 is stretched defending the pawn while controlling key squares; coordination vulnerability is Black's only lever; Bishop on d4 restricts King mobility via diagonals; find active squares that avoid capture while maintaining threats; g7/h7 pawn advances are the only long-term drawing resource; White must prevent h5/g5 breakthroughs at all costs.
6. Candidates Candidates: Kxa4 (Captures White's critical passed pawn; activates King directly per plan; reduces material gap.) | Ka6 (Retreats King away; maintains setup but passive; avoids pawn capture.)
- chess.js.legal_moves0ms
- llm.candidates20783ms · $0.0080
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxa4 — Captures White's critical passed pawn; activates King directly per plan; eliminates main winning asset. Ra5+ check unavoidable but pawn gone, King gaining center access.. Rejected: a5a6.
- llm.reflect24243ms · $0.0104
9. Commit Commit Kxa4 (a5a4).
63.Bxg7Sonnet
1. Observe Halbzug 63, Weiss am Zug. Phase: Endspiel. Weiss +9 Punkte. Legale Zuege: 37. 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-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 connected f/g/h pawns toward promotion while keeping the Black king stranded on a4 with Rook control of the b-file. Bishop on d4 seals the long diagonal, preventing king escape toward the cent…
- llm.plan67215ms · $0.0513
full reasoning
Phase: endgame. Advance the connected f/g/h pawns toward promotion while keeping the Black king stranded on a4 with Rook control of the b-file. Bishop on d4 seals the long diagonal, preventing king escape toward the center. White king centralizes to escort the pawn wave. Force promotion on the kingside: with Black king locked on a4 and unable to cross to the kingside in time, advance f2-f4-f5-f6 as the spearhead while Rook and Bishop maintain a cage — White wins by converting material superiority into a passed pawn on the seventh rank. Critical: Black king on a4 is five tempi away from the kingside pawn race — the key asymmetry that makes this technically winning; Black g7/h7 pawns can advance if White loses tempo — must not allow them to become passed pawns themselves; Opposition principle (Memory hit #3) applies when White king advances to e3-d4-c5 corridor: maintain opposition to lock Black king out of key defensive squares; Rook on b5 functions as a cutting board along the b-file and fifth rank — consistent with active rook play from Philidor/Lucena canon (Memory hits #1/#2): rook dominance behind or beside the pawn mass maximizes winning chances.
6. Candidates Candidates: Bxg7 (Eliminates Black's g-pawn counterplay threat; Memory heuristic #1: active piece play removes opponent resources while gaining material.) | Rb4+ (Checks Black king on a4, driving it further from kingside…
- chess.js.legal_moves0ms
- llm.candidates21293ms · $0.0153
full reasoning
Candidates: Bxg7 (Eliminates Black's g-pawn counterplay threat; Memory heuristic #1: active piece play removes opponent resources while gaining material.) | Rb4+ (Checks Black king on a4, driving it further from kingside; rook cage principle keeps king stranded per plan.) | f4 (Launches the f-pawn spearhead advance; Black king is five tempi away, so tempo investment is immediately winning.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxg7 — Eliminates Black's g7 counterplay pawn immediately. With only h7 remaining and Black king 5+ tempi from kingside, White's f/g/h pawn mass advances freely behind Rb5 cage — pure conversion.. Rejected: b…
- llm.reflect33721ms · $0.0254
full reasoning
Final pick: Bxg7 — Eliminates Black's g7 counterplay pawn immediately. With only h7 remaining and Black king 5+ tempi from kingside, White's f/g/h pawn mass advances freely behind Rb5 cage — pure conversion.. Rejected: b5b4, f2f4.
9. Commit Commit Bxg7 (d4g7).
64...h5Haiku
1. Observe Halbzug 64, Schwarz am Zug. Phase: Endspiel. Weiss +10 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_search6ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search4ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Activate the h-pawn as sole counterplay asset. Push toward promotion to occupy White's pieces and create tactical urgency. King must remain flexible, repositioning to support pawn advance or exploit tempo…
- llm.plan48941ms · $0.0237
full reasoning
Phase: endgame. Activate the h-pawn as sole counterplay asset. Push toward promotion to occupy White's pieces and create tactical urgency. King must remain flexible, repositioning to support pawn advance or exploit tempo gains. Force h-pawn promotion by exhausting White's defensive resources; even hopeless material deficit becomes drawing resource if Black pawn reaches rank 2-1 with tempo. Critical: White Bishop g7 controls h6, forcing h7-h5 as only legal pawn move—commits Black to that trajectory; White Rook b5 seals Black King a4 from entering the game; King mobility (Ka3, Kb3, Kb4) is tactical luxury, not strategy; White's three pawns will race up board if ignored; Black pawn must move every turn to compete for tempo.
6. Candidates Candidates: h5 (Two-square advance maximizes promotion tempo; commits fully to h-pawn counterplay, sole strategic asset.) | h6 (One-square pawn advance still activates counterplay toward promotion, though controlled by B…
- chess.js.legal_moves0ms
- llm.candidates59952ms · $0.0332
full reasoning
Candidates: h5 (Two-square advance maximizes promotion tempo; commits fully to h-pawn counterplay, sole strategic asset.) | h6 (One-square pawn advance still activates counterplay toward promotion, though controlled by Bishop g7.) | Kxb5 (Removes Rook defender; potentially frees King to reposition and support h-pawn race if tempo develops.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: h5 — Two-square advance maximizes promotion tempo in critical race. White's three queenside pawns advance freely unless h-pawn creates immediate tactical urgency. h5 forces White to commit to stopping pawn ov…
- llm.reflect28205ms · $0.0129
full reasoning
Final pick: h5 — Two-square advance maximizes promotion tempo in critical race. White's three queenside pawns advance freely unless h-pawn creates immediate tactical urgency. h5 forces White to commit to stopping pawn over pushing material.. Rejected: h7h6, a4b5.
9. Commit Commit h5 (h7h5).
65.Rxh5Sonnet
1. Observe Halbzug 65, Weiss am Zug. Phase: Endspiel. Weiss +10 Punkte. Legale Zuege: 36. 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_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Eliminate Black's only counterplay by capturing the h5 pawn with the Rook (Rb5-h5), then advance the connected f/g/h pawn mass toward promotion. Black king on a4 is six tempi from h1 and cannot intervene.…
- llm.plan36717ms · $0.0259
full reasoning
Phase: endgame. Eliminate Black's only counterplay by capturing the h5 pawn with the Rook (Rb5-h5), then advance the connected f/g/h pawn mass toward promotion. Black king on a4 is six tempi from h1 and cannot intervene. Bishop on g7 seals the g-diagonal and supports pawn advance. Convert overwhelming material superiority by queening a kingside pawn; the Black king is geometrically stranded on a4 and the h5 pawn — White's only tactical concern — is immediately capturable via Rxh5. Critical: Black h5 pawn is the sole counterplay — if White delays capture it advances unsupported and could become a race; Rb5 can take h5 immediately; Memory hit [Lucena rook]: build a bridge only if needed — here Black has no rook, so promotion is trivial once h5 is gone; Memory hit [opposition]: White king on e2 should centralize to e3-f3-g4 to escort the pawn wave and maintain geometric dominance over any king infiltration route; Bishop on g7 controls f8/h8 promotion squares indirectly; must not drift from this diagonal during the pawn march; Black king on a4 needs 6+ moves to reach f-file — the pawn sprint f2-f4-f5-f6-f7-f8=Q wins before it arrives.
6. Candidates Candidates: Rxh5 (Eliminates Black's sole counterplay pawn; memory [Lucena rook]: no Black rook means trivial promotion once h5 is gone.) | Ke3 (Memory [opposition]: King centralises toward e3-f3-g4 to geometrically esco…
- chess.js.legal_moves0ms
- llm.candidates21235ms · $0.0156
full reasoning
Candidates: Rxh5 (Eliminates Black's sole counterplay pawn; memory [Lucena rook]: no Black rook means trivial promotion once h5 is gone.) | Ke3 (Memory [opposition]: King centralises toward e3-f3-g4 to geometrically escort the f/g/h pawn wave to promotion.) | f4 (Launches the connected pawn mass; Black king on a4 needs 6+ tempi to intervene — sprint wins the race.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rxh5 — Eliminates Black's sole counterplay immediately. Memory [Lucena rook]: no Black rook means promotion is trivial once h5 is gone. Rook on h5 stays active to support f/g pawn sprint; Black king on a4 is …
- llm.reflect35425ms · $0.0252
full reasoning
Final pick: Rxh5 — Eliminates Black's sole counterplay immediately. Memory [Lucena rook]: no Black rook means promotion is trivial once h5 is gone. Rook on h5 stays active to support f/g pawn sprint; Black king on a4 is geometrically stranded and cannot intervene.. Rejected: e2e3, f2f4.
9. Commit Commit Rxh5 (b5h5).
66...Kb3Haiku
1. Observe Halbzug 66, Schwarz am Zug. Phase: Endspiel. Weiss +11 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Delay forced checkmate. Maintain King mobility across three legal squares (Ka3, Kb3, Kb4). No counterplay exists; position is completely lost by material deficit. Black is mated by force within 20 moves. …
- llm.plan40394ms · $0.0193
full reasoning
Phase: endgame. Delay forced checkmate. Maintain King mobility across three legal squares (Ka3, Kb3, Kb4). No counterplay exists; position is completely lost by material deficit. Black is mated by force within 20 moves. Only practical goal: maximize move count before checkmate. Critical: Material floor: Black King vs White K+R+B+3P is forced mate, down 11 material; Rook on h5 controls rank 5 and h-file, reducing 7 possible King moves to 3 legal moves only; No Black pawns remain for counterplay; previous plan for h-pawn activation is moot; Bishop on g7 seals dark-squared diagonals; mating net tightens each move.
6. Candidates Candidates: Kb4 (Maintains King mobility on b-file. Rotates between legal squares to delay forced mate.) | Kb3 (Central legal square. Avoids h5 Rook control. Perpetuates three-square rotation for maximum ply.) | Ka3 (Edg…
- chess.js.legal_moves0ms
- llm.candidates12374ms · $0.0037
full reasoning
Candidates: Kb4 (Maintains King mobility on b-file. Rotates between legal squares to delay forced mate.) | Kb3 (Central legal square. Avoids h5 Rook control. Perpetuates three-square rotation for maximum ply.) | Ka3 (Edge square in legal range. Completes mobility triangle. No counterplay; only delay tactics remain.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kb3 — Most central square among the three legal moves maintains maximum flexibility in the forced cycle. Ka3 edge-traps the King near corner. Kb4 less efficiently positioned within the three-square rotation..…
- llm.reflect37255ms · $0.0180
full reasoning
Final pick: Kb3 — Most central square among the three legal moves maintains maximum flexibility in the forced cycle. Ka3 edge-traps the King near corner. Kb4 less efficiently positioned within the three-square rotation.. Rejected: a4b4, a4a3.
9. Commit Commit Kb3 (a4b3).
67.h4Sonnet
1. Observe Halbzug 67, Weiss am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 34. 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_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance the connected f/g/h pawn mass toward promotion. Rook on h5 already neutralised the h-pawn threat (previous plan executed). Bishop on g7 seals the long diagonal. Push f2-f4-f5-f6 or h2-h4 as the sp…
- llm.plan34266ms · $0.0242
full reasoning
Phase: endgame. Advance the connected f/g/h pawn mass toward promotion. Rook on h5 already neutralised the h-pawn threat (previous plan executed). Bishop on g7 seals the long diagonal. Push f2-f4-f5-f6 or h2-h4 as the spearhead while Rook and Bishop escort. Black king on b3 is 7+ tempi from h1 and geometrically locked out. Queen a kingside pawn within 6 moves by advancing the pawn mass unimpeded — Black has zero pieces, zero counterplay, and the White king on e2 advances in opposition (memory: Opposition heuristic) to escort the pawn chain to promotion; Lucena/Philidor scenarios (memory hits 1+2) are irrelevant since Black fields no rook, simplifying conversion to a pure pawn-race White wins trivially. Critical: Black king on b3 cannot reach h-file — Rook on h5 cuts the 5th rank horizontally; No Black pieces means zero mating threats or stalemate risk as long as White avoids trapping the Black king in a pawn-cage prematurely; White should advance h2-h4 first to gain space on the file the Rook already occupies, then push the whole pawn mass; King on e2 moves toward f3-g4 to provide opposition escort.
6. Candidates Candidates: h4 (Advances h-pawn per explicit plan: Rook on h5 already holds the file; h4 gains space behind it, launching the pawn mass.) | f4 (Starts f/g/h pawn chain rolling; King on e2 can march f3-g4 (Opposition heur…
- chess.js.legal_moves0ms
- llm.candidates24721ms · $0.0182
full reasoning
Candidates: h4 (Advances h-pawn per explicit plan: Rook on h5 already holds the file; h4 gains space behind it, launching the pawn mass.) | f4 (Starts f/g/h pawn chain rolling; King on e2 can march f3-g4 (Opposition heuristic) to escort the advancing mass.) | Rh3+ (Heuristic-hit: check drives Black king further from h-file, cutting the 3rd rank and accelerating zugzwang on b3-side.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: h4 — Executes the explicit plan: Rook already on h5 controls the h-file, so h4 gains space directly behind it and launches the f/g/h pawn mass. Black king on b3 is 7+ tempi from stopping h6-h7-h8.. Rejected: …
- llm.reflect64206ms · $0.0486
full reasoning
Final pick: h4 — Executes the explicit plan: Rook already on h5 controls the h-file, so h4 gains space directly behind it and launches the f/g/h pawn mass. Black king on b3 is 7+ tempi from stopping h6-h7-h8.. Rejected: f2f4, h5h3.
9. Commit Commit h4 (h2h4).
68...Kb4Haiku
1. Observe Halbzug 68, Schwarz am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 6. 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Shuffle King to safe squares (Ka3, Ka4, Kb4, Ka2), avoid corner confinement; extend game as long as possible before checkmate. Maintain maximum King mobility across available flight squares while White ad…
- llm.plan46893ms · $0.0282
full reasoning
Phase: endgame. Shuffle King to safe squares (Ka3, Ka4, Kb4, Ka2), avoid corner confinement; extend game as long as possible before checkmate. Maintain maximum King mobility across available flight squares while White advances pawns; forced mate inevitable within 20 moves. Critical: Rook controls rank 5 and h-file, limiting King escape routes; Bishop seals forward progression at c3; White King prevents c2 refuge; No pawn counterplay remains; Checkmate forced within ~20 moves.
6. Candidates Candidates: Kb4 (Centralizes King, preserves max escape routes, delays mate while staying mobile.) | Kc4 (Keeps King in flexible center-ish zone, avoids edge confinement, extends resistance.) | Ka4 (Shuffles toward edge …
- chess.js.legal_moves0ms
- llm.candidates21330ms · $0.0088
full reasoning
Candidates: Kb4 (Centralizes King, preserves max escape routes, delays mate while staying mobile.) | Kc4 (Keeps King in flexible center-ish zone, avoids edge confinement, extends resistance.) | Ka4 (Shuffles toward edge with breathing room, maintains King mobility across a-file.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kb4 — Centralizes King with sustainable oscillation pattern: a4–b3–c4. Maintains 3 escape routes after White's next move. Balances avoidance of edge confinement with maximum breathing room.. Rejected: b3c4, b…
- llm.reflect56313ms · $0.0322
full reasoning
Final pick: Kb4 — Centralizes King with sustainable oscillation pattern: a4–b3–c4. Maintains 3 escape routes after White's next move. Balances avoidance of edge confinement with maximum breathing room.. Rejected: b3c4, b3a4.
9. Commit Commit Kb4 (b3b4).
69.Rh6Sonnet
1. Observe Halbzug 69, Weiss am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 30. 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_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. March h4→h5→h6→h7→h8 with Rook escort from h5; Bishop on g7 already covers the promotion square h8 along the diagonal. Black king on b4 is 6 files and 4 ranks from h8 — geometrically locked out. Philidor/…
- llm.plan47738ms · $0.0348
full reasoning
Phase: endgame. March h4→h5→h6→h7→h8 with Rook escort from h5; Bishop on g7 already covers the promotion square h8 along the diagonal. Black king on b4 is 6 files and 4 ranks from h8 — geometrically locked out. Philidor/Lucena structures are irrelevant: Black has no rook to defend, so no drawing fortress is possible. Push begins immediately. Promote the h-pawn to a Queen within 5 moves using Rook + Bishop coordination, while the connected f2/g2 pawns serve as unstoppable secondary passers — Opposition heuristic applies only if a king-race scenario emerges, but Black's king distance makes even that unnecessary. Critical: Black king on b4 is 6 files from h-file and cannot intercept the h-pawn in time; Bishop on g7 covers h8 (one diagonal step), sealing the promotion square against any Black king approach; White has zero weaknesses and 30 legal moves — no tempo concessions needed, pure advancement wins.
6. Candidates Candidates: Rh6 (Rook escorts h-pawn directly; h6 supports h4-h5 advance, Black king on b4 geometrically locked out.) | Bf8+ (Check forces Black king to move, gaining tempo while maintaining Bishop control of promotion d…
- chess.js.legal_moves0ms
- llm.candidates12973ms · $0.0074
full reasoning
Candidates: Rh6 (Rook escorts h-pawn directly; h6 supports h4-h5 advance, Black king on b4 geometrically locked out.) | Bf8+ (Check forces Black king to move, gaining tempo while maintaining Bishop control of promotion diagonal.)
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rh6 — Rook on h5 physically blocks the h-pawn from advancing to h5. Rh6 clears h5 immediately, allowing h4-h5 next move. Bishop stays on g7 covering the h8 promotion square. Most direct winning path.. Rejecte…
- llm.reflect71776ms · $0.0629
full reasoning
Final pick: Rh6 — Rook on h5 physically blocks the h-pawn from advancing to h5. Rh6 clears h5 immediately, allowing h4-h5 next move. Bishop stays on g7 covering the h8 promotion square. Most direct winning path.. Rejected: g7f8.
9. Commit Commit Rh6 (h5h6).
70...Kb3Haiku
1. Observe Halbzug 70, Schwarz am Zug. Phase: Endspiel. Weiss +11 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_search16ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Shuffle King across a2–b4 corridor (Ka3, Ka4, Kb3) over next 5 moves. Avoid corner squares (a1, b1). Exploit tempo by moving between safe squares while White constructs mating net. Prolong the game throug…
- llm.plan22264ms · $0.0087
full reasoning
Phase: endgame. Shuffle King across a2–b4 corridor (Ka3, Ka4, Kb3) over next 5 moves. Avoid corner squares (a1, b1). Exploit tempo by moving between safe squares while White constructs mating net. Prolong the game through passive King evasion; no counterplay exists, checkmate is forced within 15–20 moves. Critical: Rook h6 controls h-file and rank 6; Bishop g7 seals d4/c3 escape routes; Black King trapped to a/b-files with only 7 legal moves; no pawn shelter or counterplay; Corners a1/b1 create immediate mating patterns; must stay mobile on middle squares; White King on e2 supports pawn advance; f2–f4–f5 push looms as mating accelerant.
6. Candidates Candidates: Ka3 (Corridor anchor: a3 fuels Ka4/Kb3 shuttle pattern. Safe from mating nets.) | Ka4 (Mid-corridor: a4 maintains tempo, feeds next Ka3 or Kb4 escape. Prolong.) | Kb3 (Corridor swing: b3 bridges a3/a4/b4 tria…
- chess.js.legal_moves0ms
- llm.candidates12497ms · $0.0053
full reasoning
Candidates: Ka3 (Corridor anchor: a3 fuels Ka4/Kb3 shuttle pattern. Safe from mating nets.) | Ka4 (Mid-corridor: a4 maintains tempo, feeds next Ka3 or Kb4 escape. Prolong.) | Kb3 (Corridor swing: b3 bridges a3/a4/b4 triangle. Avoids corner mating traps.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kb3 — Kb3 bridges the shuttle triangle (a3/a4/b3/b4) most flexibly. Central position preserves maximum escape squares and tempo options vs. corner-adjacent Ka3 or edge-drifting Ka4.. Rejected: b4a3, b4a4.
- llm.reflect41957ms · $0.0216
9. Commit Commit Kb3 (b4b3).
71.h5Sonnet
1. Observe Halbzug 71, Weiss am Zug. Phase: Endspiel. Weiss +11 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_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. March h4→h5→h6→h7→h8 under Rook escort from h6; Bishop on g7 statically covers the promotion square h8 via the g7-h8 diagonal. No redeployment needed — all pieces are already optimally placed. Promote to …
- llm.plan27251ms · $0.0178
full reasoning
Phase: endgame. March h4→h5→h6→h7→h8 under Rook escort from h6; Bishop on g7 statically covers the promotion square h8 via the g7-h8 diagonal. No redeployment needed — all pieces are already optimally placed. Promote to Queen within 4-5 moves. Secondary f2/g2 pawns are unstoppable backup threats. Queen the h-pawn immediately, then use Queen+Rook+Bishop to deliver checkmate against the stranded Black King — the game is decided, only the execution remains. Critical: Black King on b3 is 6 files and 4 ranks from h8 — geometrically incapable of intercepting the h-pawn march; Opposition heuristic (memory hit 3) is irrelevant: no king-race scenario can emerge at this distance; Philidor rook defence (memory hit 1) and Lucena technique (memory hit 2) are impossible for Black: Black has zero defensive pieces, no rook to man the third rank or first rank — the classic drawing fortresses simply do not exist here; No Black threats whatsoever — White can advance at full tempo with zero defensive obligations.
6. Candidates Candidates: h5 (Most direct pawn advance per plan; Black King on b3 is geometrically unable to intercept the h-pawn march.) | Rh8 (Rook pre-occupies promotion square; bishop on g7 covers h8 diagonal; pawn marches h5-h6-h…
- chess.js.legal_moves0ms
- llm.candidates69280ms · $0.0547
full reasoning
Candidates: h5 (Most direct pawn advance per plan; Black King on b3 is geometrically unable to intercept the h-pawn march.) | Rh8 (Rook pre-occupies promotion square; bishop on g7 covers h8 diagonal; pawn marches h5-h6-h7 without rook obstruction.) | Rb6+ (Active piece play per Gen-0 directive; check forces Black King to a worse square before h5 tempo gain.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: h5 — Most direct pawn advance per plan; Black King on b3 is geometrically unable to intercept the h-pawn march.. Rejected: h6h8, h6b6. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit h5 (h4h5).
72...Ka3Haiku
1. Observe Halbzug 72, Schwarz am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 6. 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-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Shuffle King on a2–a4–b4 corridor over next 5 moves. Avoid corners a1/b1 (death traps, mate in 1-2). Exploit tempo by oscillating between safe middle squares while White constructs mating net. Prolong gam…
- llm.plan26349ms · $0.0095
full reasoning
Phase: endgame. Shuffle King on a2–a4–b4 corridor over next 5 moves. Avoid corners a1/b1 (death traps, mate in 1-2). Exploit tempo by oscillating between safe middle squares while White constructs mating net. Prolong game via passive King evasion. White will promote h-pawn (h5→h8=Q) or achieve Rook+Bishop checkmate. Black's sole objective is prolonged passive King shuffling on safe squares (a2, a3, a4, b3, b4) to delay mate by 15–20 moves. Critical: White's Rook h6 + Bishop g7 coordinate to seal d4/c3/e5 escape routes and shrink King's mobility zone; Black King trapped to a/b files with 6 legal moves; corners a1/b1 trigger immediate mating patterns within 1–2 ply; White's h5 pawn will advance soon; Black must avoid h-file threats and back-rank mates while staying mobile on rank 3–4.
6. Candidates Candidates: Kb4 (Central position in safe corridor a2–a4–b4. Maintains King mobility, oscillates between secure squares to delay mate.) | Ka4 (Edge of safe a-file corridor. Keeps King on passive evasion trajectory, avoid…
- chess.js.legal_moves0ms
- llm.candidates18726ms · $0.0085
full reasoning
Candidates: Kb4 (Central position in safe corridor a2–a4–b4. Maintains King mobility, oscillates between secure squares to delay mate.) | Ka4 (Edge of safe a-file corridor. Keeps King on passive evasion trajectory, avoids mating corners a1/b1, delays h-pawn threats.) | Ka3 (Middle of safe corridor. Passive oscillation pattern extends game by prolonging King's mobility zone between a2–a4–b4.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ka3 — Centralizes King at hub of safe oscillation zone. From a3, King reaches 4 safe squares (a2, a4, b3, b4). Maximum flexibility delays mate.. Rejected: b3b4, b3a4.
- llm.reflect51778ms · $0.0272
9. Commit Commit Ka3 (b3a3).
73.Ra6+Sonnet
1. Observe Halbzug 73, Weiss am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 28. 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_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Vacate h6 with the Rook to unblock the h-pawn, then march h5→h6→h7→h8=Q. Bishop on g7 permanently covers the h8 promotion square. Black King on a3 is geometrically irrelevant — 7 files from h8, 4 ranks sh…
- llm.plan27333ms · $0.0182
full reasoning
Phase: endgame. Vacate h6 with the Rook to unblock the h-pawn, then march h5→h6→h7→h8=Q. Bishop on g7 permanently covers the h8 promotion square. Black King on a3 is geometrically irrelevant — 7 files from h8, 4 ranks short of intercepting. Queen the h-pawn within 3 moves, then use Queen+Rook+Bishop to deliver forced checkmate against the lone Black King stranded on the queenside — secondary f2/g2 pawns are unstoppable backup if needed. Critical: Rook on h6 currently BLOCKS own pawn — must relocate this move (h7 or h8 ideal, keeps escort geometry); Bishop g7 statically controls h8: no redeployment needed, promotion square pre-covered; Black King a3 needs 7+ moves to reach h-file — Opposition heuristic confirms geometric impossibility of interception; No Black pieces can threaten: pure execution, zero counterplay risk.
6. Candidates Candidates: Ra6+ (Clears entire h-file in one move AND gives check; king geometrically irrelevant heuristic confirmed — forces tempo loss, pawn marches h5→h6→h7→h8=Q unimpeded.) | Rg6 (Vacates h6 completely per must-relo…
- chess.js.legal_moves0ms
- llm.candidates83888ms · $0.0750
full reasoning
Candidates: Ra6+ (Clears entire h-file in one move AND gives check; king geometrically irrelevant heuristic confirmed — forces tempo loss, pawn marches h5→h6→h7→h8=Q unimpeded.) | Rg6 (Vacates h6 completely per must-relocate heuristic; bishop on g7 pre-covers h8 promotion square — silent file clearance allows immediate three-move pawn march to queen.) | Rh7 (Plan-recommended escort square; rook-must-vacate-h6 heuristic satisfied, unblocks h5→h6 immediately; escort geometry preserved though second rook move needed before h8=Q.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ra6+ — Vacates h6 AND delivers check simultaneously — free tempo since king-geometrically-irrelevant heuristic confirms a3-king needs 7+ moves to reach h-file. Bishop on g7 statically pre-covers h8, so no roo…
- llm.reflect46859ms · $0.0348
full reasoning
Final pick: Ra6+ — Vacates h6 AND delivers check simultaneously — free tempo since king-geometrically-irrelevant heuristic confirms a3-king needs 7+ moves to reach h-file. Bishop on g7 statically pre-covers h8, so no rook escort needed: h6→h7→h8=Q in 3 follow-up moves.. Rejected: h6g6, h6h7.
9. Commit Commit Ra6+ (h6a6).
74...Kb4Haiku
1. Observe Halbzug 74, Schwarz am Zug. Phase: Endspiel. Weiss +11 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_search12ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Two legal moves available: Kb3, Kb4. Oscillate between them to force White into advancing h-pawn or maneuvering Rook for mate. No tactic for Black; defer mate by correct square selection. Survive by passi…
- llm.plan49820ms · $0.0261
full reasoning
Phase: endgame. Two legal moves available: Kb3, Kb4. Oscillate between them to force White into advancing h-pawn or maneuvering Rook for mate. No tactic for Black; defer mate by correct square selection. Survive by passively shuffling King between b3 and b4 while White inexorably promotes h-pawn to Queen or delivers mate via Rook+Bishop. Critical: opponent threat: h5-pawn marches h6→h7→h8=Q unstoppably; Rook a6 controls a-file and will deliver mate or force King into mating net; own weakness: King confined to b3/b4 corridor; Bishop g7 cuts off escape squares b2/c3; zero counterplay, zero tactics available; concrete tactical threat: If Kb3, White plays Ra3+ forcing Kb4, then h6 is unstoppable; King cannot escape a/b files.
6. Candidates Candidates: Kb4 (Avoids forced Ra3+ check; maintains King oscillation flexibility in trapped b-file corridor.) | Kb3 (Oscillates to third rank but allows Ra3+ forcing Kb4, accelerating h-pawn promotion.)
- chess.js.legal_moves0ms
- llm.candidates23861ms · $0.0109
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kb4 — Avoids forced Ra3+ check (which is only check when King sits on 3rd rank). Keeps King on b4 where it has escape squares b5/c5 available; Kb3 would hand White a tempo-gaining check before h6, locking Kin…
- llm.reflect67999ms · $0.0387
full reasoning
Final pick: Kb4 — Avoids forced Ra3+ check (which is only check when King sits on 3rd rank). Keeps King on b4 where it has escape squares b5/c5 available; Kb3 would hand White a tempo-gaining check before h6, locking King to lower ranks.. Rejected: a3b3.
9. Commit Commit Kb4 (a3b4).
75.h6Sonnet
1. Observe Halbzug 75, Weiss am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 35. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search6ms
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 h-pawn h5→h6→h7→h8=Q in three unimpeded moves. Rook has already relocated from h6 to a6 (previous plan executed), so the h-file is clear. Bishop g7 statically locks h8. Black King on b4 is six fil…
- llm.plan38252ms · $0.0255
full reasoning
Phase: endgame. Advance h-pawn h5→h6→h7→h8=Q in three unimpeded moves. Rook has already relocated from h6 to a6 (previous plan executed), so the h-file is clear. Bishop g7 statically locks h8. Black King on b4 is six files from the promotion square and geometrically unable to intercept. Queen the h-pawn immediately via forced march, then use Queen+Rook+Bishop to deliver checkmate against the lone Black King stranded on the queenside — f2/g2 pawns serve as unstoppable backup insurance if needed. Critical: Black King b4 cannot reach h8 in time — Lucena bridge-building principle: Rook on a6 cuts the King laterally, denying any queenside-to-kingside transit across the a-file; No Black piece contests the h-file or h8 — Bishop g7 permanently covers the promotion square without redeployment; Opposition heuristic irrelevant here: White King on e2 need not march to escort the pawn — material dominance makes king activation secondary to pawn sprint.
6. Candidates Candidates: h6 (Direct plan execution: h-pawn sprint to h6. Black King on b4 is six files away and geometrically unable to intercept.) | Rb6+ (Heuristic: Rook check forces King further from h-file, reinforcing lateral cu…
- chess.js.legal_moves0ms
- llm.candidates40764ms · $0.0287
full reasoning
Candidates: h6 (Direct plan execution: h-pawn sprint to h6. Black King on b4 is six files away and geometrically unable to intercept.) | Rb6+ (Heuristic: Rook check forces King further from h-file, reinforcing lateral cut-off before pawn sprint resumes.) | Bf8+ (Heuristic: Bishop exploits b4-f8 diagonal for tempo check, gaining a free move while King is forced to react.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: h6 — Direct pawn sprint begins forced h6-h7-h8=Q in 3 moves. Black King on b4 requires 5+ moves to reach g8/h8 — geometrically unable to intercept. Checks waste tempo with zero interception benefit.. Rejected…
- llm.reflect32275ms · $0.0234
full reasoning
Final pick: h6 — Direct pawn sprint begins forced h6-h7-h8=Q in 3 moves. Black King on b4 requires 5+ moves to reach g8/h8 — geometrically unable to intercept. Checks waste tempo with zero interception benefit.. Rejected: a6b6, g7f8.
9. Commit Commit h6 (h5h6).
76...Kb3Haiku
1. Observe Halbzug 76, Schwarz am Zug. Phase: Endspiel. Weiss +11 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_search21ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Shuffle King between b3 and b4 to force h-pawn advance (h6→h7→h8). Avoid Ra4# by maintaining mobility. Defer mate by offering White only zugzwang (must progress manually, cannot pass). Position is lost; g…
- llm.plan24417ms · $0.0107
full reasoning
Phase: endgame. Shuffle King between b3 and b4 to force h-pawn advance (h6→h7→h8). Avoid Ra4# by maintaining mobility. Defer mate by offering White only zugzwang (must progress manually, cannot pass). Position is lost; goal is maximum defensive resistance. Force White to advance h-pawn to h8=Q, then accept mate. Zugzwang principle: oscillate King so White must commit resources to promotion or mate, not wait. Critical: h-pawn on h6 advances unstoppably h6→h7→h8=Q (2 White moves, then mate); Ra4# threatened immediately; King must shuttle between b3/b4 to avoid mate-in-1; Bishop g7 locks King into b3/b4 corridor (controls b2, c3); Black has zero pieces, zero counter-play, zero tactical breaks; Opposition via King shuttle forces White to push h-pawn rather than wait; maximizes move count before promotion.
6. Candidates Candidates: Kb3 (Shuttle move; maintains opposition; forces h7 advance over passive play.) | Kb5 (Activates King towards White pawns; creates potential for interference.) | Kc5 (Centralizes; moves towards h-pawn; maintai…
- chess.js.legal_moves0ms
- llm.candidates65724ms · $0.0360
full reasoning
Candidates: Kb3 (Shuttle move; maintains opposition; forces h7 advance over passive play.) | Kb5 (Activates King towards White pawns; creates potential for interference.) | Kc5 (Centralizes; moves towards h-pawn; maintains King mobility and escape options.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kb3 — Initiates King shuttle between b3/b4 to force zugzwang. White must push h7 (forced progression) rather than wait passively. Maintains opposition in corridor controlled by Bg7.. Rejected: b4b5, b4c5.
- llm.reflect17735ms · $0.0067
9. Commit Commit Kb3 (b4b3).
77.h7Sonnet
1. Observe Halbzug 77, Weiss am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 33. 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. Push h6→h7 this move, then h7→h8=Q next. Bishop g7 guards h8 making promotion uncontested. Ra6 maintains Lucena-style cut across the 6th rank — Black King on b3 cannot cross to the h-file or reach the pro…
- llm.plan35767ms · $0.0243
full reasoning
Phase: endgame. Push h6→h7 this move, then h7→h8=Q next. Bishop g7 guards h8 making promotion uncontested. Ra6 maintains Lucena-style cut across the 6th rank — Black King on b3 cannot cross to the h-file or reach the promotion square in time. Queen the h-pawn within two moves while Ra6 severs Black King access per Lucena cut-off principle, then deploy Queen+Rook+Bishop trinity to force rapid checkmate against the lone Black King stranded on the queenside. Critical: Black King b3 is 6+ files from h8 — geometrically cannot intercept even with optimal play; Ra6 Lucena cut-off blocks King from crossing 6th rank toward h-file (heuristic: Ra6 referenced explicitly); Bg7 guards h8 — promotion square is pre-controlled before Queen arrives; f2/g2 pawns are passive backup insurance, irrelevant to primary winning line.
6. Candidates Candidates: h7 (Direct plan execution: pawn races to h7, Bishop g7 pre-guards h8, Black King b3 geometrically cannot intercept.) | Rb6+ (Forces King off b3, strengthening Lucena cut-off; tempo gained while Black King ret…
- chess.js.legal_moves0ms
- llm.candidates23221ms · $0.0156
full reasoning
Candidates: h7 (Direct plan execution: pawn races to h7, Bishop g7 pre-guards h8, Black King b3 geometrically cannot intercept.) | Rb6+ (Forces King off b3, strengthening Lucena cut-off; tempo gained while Black King retreats from rook's 6th-rank barrier.) | Ra3+ (Check drives King further from h-file; Ra6 Lucena cut principle still applies after recentralizing rook.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: h7 — Pawn reaches h7 immediately; Bg7 already covers h8 so h7-h8=Q is uncontested next move. Black King on b3 needs 6+ moves to reach h8 — geometrically impossible to interfere.. Rejected: a6b6, a6a3.
- llm.reflect28297ms · $0.0193
9. Commit Commit h7 (h6h7).
78...Kb4Haiku
1. Observe Halbzug 78, Schwarz am Zug. Phase: Endspiel. Weiss +11 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_search20ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search12ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Delay mate 2-3 moves by oscillating King between b4 and c3 to avoid Ra4#. Force White to advance h7-h8=Q rather than secure mating setup; accept mate as inevitable after promotion. Position is objectively…
- llm.plan47771ms · $0.0263
full reasoning
Phase: endgame. Delay mate 2-3 moves by oscillating King between b4 and c3 to avoid Ra4#. Force White to advance h7-h8=Q rather than secure mating setup; accept mate as inevitable after promotion. Position is objectively lost. Black has only a King against R+B+3P; no counterplay exists. Goal is to resist via maximal King mobility and force White to commit moves to mate, not wait passively. Critical: h7-h8=Q unstoppable in 1 move; ends all resistance; Ra4# is primary mating net unless King evades via b4/c3 rotation; Black has zero material to trade or sacrifice; pure zugzwang endgame; Mate will follow h8=Q promotion within 2-3 additional moves.
6. Candidates Candidates: Kb4 (Initiates b4-c3 oscillation pattern to delay Ra4# checkmate threat) | Kc4 (Delays Ra4# mate, maintains King mobility near critical defense squares) | Kc2 (Prevents immediate Ra4# but breaks optimal b4-c3…
- chess.js.legal_moves0ms
- llm.candidates42782ms · $0.0219
full reasoning
Candidates: Kb4 (Initiates b4-c3 oscillation pattern to delay Ra4# checkmate threat) | Kc4 (Delays Ra4# mate, maintains King mobility near critical defense squares) | Kc2 (Prevents immediate Ra4# but breaks optimal b4-c3 oscillation pattern)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kb4 — Initiates b4-c3 oscillation. After Ra4+, Black plays Kc3, creating a closed loop where White must repeat checks. Delays Ra4# mate and forces h8=Q promotion commitment.. Rejected: b3c4, b3c2.
- llm.reflect23821ms · $0.0077
9. Commit Commit Kb4 (b3b4).
79.h8=QSonnet
1. Observe Halbzug 79, Weiss am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 38. 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-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. Promote h7→h8=Q immediately this move. Bishop g7 guards h8, Ra6 Lucena cut-off holds Black King on b4 far from the promotion square. After queening, deploy Q+R+B trinity to force rapid checkmate — Black K…
- llm.plan40293ms · $0.0260
full reasoning
Phase: endgame. Promote h7→h8=Q immediately this move. Bishop g7 guards h8, Ra6 Lucena cut-off holds Black King on b4 far from the promotion square. After queening, deploy Q+R+B trinity to force rapid checkmate — Black King is geometrically stranded on the queenside with no counterplay. Convert overwhelming material superiority (Queen + Rook + Bishop + 3 pawns vs lone King) into checkmate within 5–10 moves by coordinating the newly-promoted Queen with Ra6 to confine the Black King to the a/b-file corner, then deliver mate. Critical: h7→h8=Q is uncontested: Bishop g7 guards h8, Black King on b4 is 6+ files away and cannot interfere — Lucena cut-off heuristic confirms King is geometrically isolated behind Ra6's 6th-rank barrier; After promotion White has Q+R+B+3 pawns vs lone King — zero defensive resources for Black, mating net closes rapidly; Black King on b4 is already poorly placed post-promotion: a-file and b-file corner become the natural mating cage; Ra6 severs northward escape per Lucena cut-off principle referenced in memory; No opponent threats exist — Black has only King moves, all of which worsen the King's position relative to the closing mating net.
6. Candidates Candidates: h8=Q (Promotes to Queen immediately; Bishop g7 guards h8, Black King on b4 is 6+ files away — uncontested promotion.) | Rb6+ (Lucena cut-off heuristic: check drives King further from promotion square, tighten…
- chess.js.legal_moves0ms
- llm.candidates17707ms · $0.0116
full reasoning
Candidates: h8=Q (Promotes to Queen immediately; Bishop g7 guards h8, Black King on b4 is 6+ files away — uncontested promotion.) | Rb6+ (Lucena cut-off heuristic: check drives King further from promotion square, tightening the mating cage.) | Bf8+ (Bishop check forces King back, coordinating active piece play while keeping promotion threat alive.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: h8=Q — Uncontested promotion: Bishop g7 guards h8, Black King on b4 is 6+ files away and cannot interfere. Immediately creates Q+R+B vs lone King — overwhelming material superiority converts to forced mate wi…
- llm.reflect9968ms · $0.0030
full reasoning
Final pick: h8=Q — Uncontested promotion: Bishop g7 guards h8, Black King on b4 is 6+ files away and cannot interfere. Immediately creates Q+R+B vs lone King — overwhelming material superiority converts to forced mate within 5-10 moves.. Rejected: a6b6, g7f8.
9. Commit Commit h8=Q (h7h8q).
80...Kc4Haiku
1. Observe Halbzug 80, Schwarz am Zug. Phase: Endspiel. Weiss +19 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_search6ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search4ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Prefer c4 or c5 to stay central and away from Ra3+/Ra5+ mating lines. Force White to maneuver Queen + Rook instead of executing quick mate. Each King move costs White a tempo. Position is objectively lost…
- llm.plan63269ms · $0.0333
full reasoning
Phase: endgame. Prefer c4 or c5 to stay central and away from Ra3+/Ra5+ mating lines. Force White to maneuver Queen + Rook instead of executing quick mate. Each King move costs White a tempo. Position is objectively lost (K vs Q+R+B+3P). No winning defense exists. Sole tactic: disrupt White's mating tempo via King mobility. Accept mate as inevitable but maximize moves until it happens. Critical: Ra3+ and Ra5+ are forced checking sequences if King drifts to b-file edges (b3/b5); Queen on h8 controls c3 via diagonal; only 4 legal moves available (Kb3, Kb5, Kc4, Kc5); c4/c5 are relatively safer than b3/b5 because central squares delay Rook's mating patterns; No counterplay or sacrifice exists; pure zugzwang endgame where oscillation is the only resistance.
6. Candidates Candidates: Kc5 (Central square delays White's mating tempo, avoids Ra5+ mating traps on b-file edge) | Kc4 (Central square maintains flexibility, forces White to maneuver Q+R instead of quick mate) | Kb5 (Accepts b-file…
- chess.js.legal_moves0ms
- llm.candidates17231ms · $0.0072
full reasoning
Candidates: Kc5 (Central square delays White's mating tempo, avoids Ra5+ mating traps on b-file edge) | Kc4 (Central square maintains flexibility, forces White to maneuver Q+R instead of quick mate) | Kb5 (Accepts b-file risk but escapes Kb3 corner; each King move costs White tempo)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kc4 — Central square maintains flexibility against mating nets. Delays Ra4+ forced checks and keeps King equidistant from edges. Objectively lost, but maximizes tempo by forcing White to reposition.. Rejected…
- llm.reflect37909ms · $0.0203
full reasoning
Final pick: Kc4 — Central square maintains flexibility against mating nets. Delays Ra4+ forced checks and keeps King equidistant from edges. Objectively lost, but maximizes tempo by forcing White to reposition.. Rejected: b4c5, b4b5.
9. Commit Commit Kc4 (b4c4).
81.Qh4+Sonnet
1. Observe Halbzug 81, Weiss am Zug. Phase: Endspiel. Weiss +19 Punkte. Legale Zuege: 46. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search6ms
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. Coordinate Qh8 + Ra6 + Bg7 to eliminate escape squares for Black King on c4. Ra6 already cuts the 6th rank (Lucena cutoff principle — heuristic 2 applies). Drive Kc4 toward the a/b-file edge using Queen s…
- llm.plan28750ms · $0.0168
full reasoning
Phase: endgame. Coordinate Qh8 + Ra6 + Bg7 to eliminate escape squares for Black King on c4. Ra6 already cuts the 6th rank (Lucena cutoff principle — heuristic 2 applies). Drive Kc4 toward the a/b-file edge using Queen sweeps and Rook confinement, then deliver checkmate within 4–6 moves. Advance White King toward d3–c3 to tighten the net. Convert +19 material advantage into forced checkmate by triangulating Queen and Rook to reduce Black King mobility to zero — target the a1 or b1 corner pocket where Q+R can mate with Bishop sealing diagonals. Critical: Black King on c4 still has c3/b3/b4/d3/d4/d5 — not yet cornered, requires active confinement; Ra6 blocks 6th rank escape upward (opposition-style cutoff — heuristic 3 reference); Bishop on g7 controls the long h8–a1 diagonal threatening to cut b2 escape square; No Black counterplay — pure conversion task, avoid stalemate on lone-King positions by leaving at least one legal square until mate is ready.
6. Candidates Candidates: Qh4+ (check score=2) | Qg8+ (check score=2) | Qc8+ (check score=2) [Fallback: Claude CLI subprocess timed out after 120000ms]
- chess.js.legal_moves0ms
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qh4+ — check score=2. Rejected: h8g8, h8c8. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Qh4+ (h8h4).
82...Kd5Haiku
1. Observe Halbzug 82, Schwarz am Zug. Phase: Endspiel. Weiss +19 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_search15ms
3. Recall Opponent No pattern found for chess-sonnet-tmd (tag=chess-sonnet-tmd) — mandatory run documented.
- nex_entity_search14ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Disrupt White's mating coordination by keeping King on central files (c/d). Avoid Ra3+/Ra5+ checking nets that force immediate mate. Force White's Q+R to maneuver before executing mate. Accept inevitable …
- llm.plan24818ms · $0.0099
full reasoning
Phase: endgame. Disrupt White's mating coordination by keeping King on central files (c/d). Avoid Ra3+/Ra5+ checking nets that force immediate mate. Force White's Q+R to maneuver before executing mate. Accept inevitable loss; maximize move count. Black's bare King versus White's K+Q+R+B+3P is objectively lost. Only tactic: delay mate 5–10 moves by avoiding b-file edges where Ra3+/Ra5+ create unstoppable mating nets. Critical: Ra3+ and Ra5+ are checking sequences forcing King to b-file, then Qb4# or similar mate-in-1 patterns; Queen on h4 controls key squares and diagonals; c3 is under fire; 4 legal moves total: Kb3 (risky Ra3+), Kb5 (risky Ra5+), Kc5 (safer, c-file), Kd5 or Kd4 (d-file retreat, also safer); Objective: every move White doesn't deliver mate is a tempo gained for Black.
6. Candidates Candidates: Kd5 (Centralizes King to d-file, safest retreat avoiding b-file checking nets Ra3+/Ra5+.) | Kb5 (Despite Ra5+ threat, King remains mobile; forces White's precise calculation before mate.) | Kc5 (Keeps King ce…
- chess.js.legal_moves0ms
- llm.candidates34470ms · $0.0192
full reasoning
Candidates: Kd5 (Centralizes King to d-file, safest retreat avoiding b-file checking nets Ra3+/Ra5+.) | Kb5 (Despite Ra5+ threat, King remains mobile; forces White's precise calculation before mate.) | Kc5 (Keeps King central on c-file; secondary safe option avoiding dangerous b-file tactics.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd5 — Centralizes King to d-file, breaking White's Ra3+/Ra5+ mating nets. Forces Queen-Rook repositioning before mate, maximizing remaining move count.. Rejected: c4b5, c4c5.
- llm.reflect19244ms · $0.0088
9. Commit Commit Kd5 (c4d5).
83.Qd4#Sonnet
1. Observe Halbzug 83, Weiss am Zug. Phase: Endspiel. Weiss +19 Punkte. Legale Zuege: 53. 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_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Relocate the Queen to the central d4-square complex to simultaneously close c5 and e5 — the only two remaining escape squares for Black King on d5. Ra6 already seals the entire 6th rank (heuristic 2: Luce…
- llm.plan81648ms · $0.0656
full reasoning
Phase: endgame. Relocate the Queen to the central d4-square complex to simultaneously close c5 and e5 — the only two remaining escape squares for Black King on d5. Ra6 already seals the entire 6th rank (heuristic 2: Lucena cutoff principle). Bg7 defends the Queen's landing square via the g7–d4 diagonal. Black King mobility will reach zero. Deliver checkmate in one move by Queen centralization to a square jointly covered by Bg7 on the long diagonal — Ra6 holds the rank cutoff, Bg7 defends the Queen, and the Queen simultaneously attacks all six adjacent King squares not already covered by the Rook. Critical: Black King on d5 has only 2 legal moves: c5 and e5 — both reachable by Queen centralization in one step; Bg7 controls the g7–e5–d4 diagonal, making Queen delivery to d4 fully protected; Ra6 must not move — it seals c6, d6, e6 and is the foundation of the mating net; White King on e2 is passive but irrelevant — Q+R+B suffice for forced mate without it.
6. Candidates Candidates: Qd4# (Checkmate: Queen on d4 attacks all King escape squares; Bg7 defends d4 via long diagonal (heuristic: Bg7 covers g7-d4); Ra6 seals rank 6.) | Qe4+ (Central Queen check forcing King to c5/c6; Ra6 Lucena c…
- chess.js.legal_moves0ms
- llm.candidates10079ms · $0.0042
full reasoning
Candidates: Qd4# (Checkmate: Queen on d4 attacks all King escape squares; Bg7 defends d4 via long diagonal (heuristic: Bg7 covers g7-d4); Ra6 seals rank 6.) | Qe4+ (Central Queen check forcing King to c5/c6; Ra6 Lucena cutoff seals 6th rank, limiting escape routes to one.) | Rd6+ (Rook check drives King off d5; combines Ra6 rank-cutoff principle with direct King harassment, setting up Queen mate next move.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qd4# — Qd4# is immediate checkmate: Queen lands on d4 defended by Bg7 along g7-d4 diagonal (heuristic: bishop guards delivery square), Ra6 seals the entire 6th rank, leaving Black King on d5 with zero legal m…
- llm.reflect9842ms · $0.0031
full reasoning
Final pick: Qd4# — Qd4# is immediate checkmate: Queen lands on d4 defended by Bg7 along g7-d4 diagonal (heuristic: bishop guards delivery square), Ra6 seals the entire 6th rank, leaving Black King on d5 with zero legal moves.. Rejected: h4e4, a6d6.
9. Commit Commit Qd4# (h4d4).
PGN
PGN anzeigen
[Event "Tournament Pairing 3"] [Site "?"] [Date "2026-05-30"] [Round "?"] [White "chess-sonnet-tmd"] [Black "chess-haiku-tm"] [Result "*"] 1. e4 d5 2. exd5 Nf6 3. d4 e5 4. dxe6 Qxd4 5. Qxd4 Nc6 6. Nf3 Nxd4 7. Nxd4 Be7 8. Nc3 Ne4 9. exf7+ Kxf7 10. Bc4+ Kg6 11. Nxe4 Bb4+ 12. c3 Bxc3+ 13. Nxc3 Re8+ 14. Ne6 Rxe6+ 15. Bxe6 Bxe6 16. O-O Bc4 17. Nd5 Rc8 18. Ne7+ Kf6 19. Nxc8 Bxf1 20. Kxf1 c5 21. Ne7 c4 22. Nd5+ Ke5 23. Ke2 Kd4 24. Be3+ Kxd5 25. Bxa7 c3 26. bxc3 Kc4 27. Bd4 b5 28. a4 b4 29. cxb4 Kxb4 30. Rb1+ Ka5 31. Rb5+ Kxa4 32. Bxg7 h5 33. Rxh5 Kb3 34. h4 Kb4 35. Rh6 Kb3 36. h5 Ka3 37. Ra6+ Kb4 38. h6 Kb3 39. h7 Kb4 40. h8=Q Kc4 41. Qh4+ Kd5 42. Qd4# *