SonnetvsSonnet
Halbzuege (68)
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_search10ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Seize center with a pawn on e4, develop knights to f3 and c3, prepare kingside bishop development toward c4 or b5, then castle short within 5-6 moves Build a classical open-game advantage through superior…
- llm.plan10928ms · $0.0037
full reasoning
Phase: opening. Seize center with a pawn on e4, develop knights to f3 and c3, prepare kingside bishop development toward c4 or b5, then castle short within 5-6 moves Build a classical open-game advantage through superior central control and faster development, aiming for active piece coordination before the opponent can equalize Critical: No opponent threats yet — pure initiative game; Memory heuristics confirm: central pawns (e4/d4) open lines for bishops and queen — e4 is the strongest first move; Knights-before-bishops principle applies: Ng1-f3 next, before committing bishops; Queen must stay home — no early queen sorties per heuristic; 20 legal moves available; choose the one that maximally contests d5/e5 from move one.
6. Candidates Candidates: e4 (Maximally contests d5/e5, opens diagonals for f1-bishop and queen — strongest central pawn move.) | d4 (Controls e5/c5, opens c1-bishop diagonal — classic center grab for spatial advantage.) | Nf3 (Knight…
- chess.js.legal_moves0ms
- llm.candidates10915ms · $0.0035
full reasoning
Candidates: e4 (Maximally contests d5/e5, opens diagonals for f1-bishop and queen — strongest central pawn move.) | d4 (Controls e5/c5, opens c1-bishop diagonal — classic center grab for spatial advantage.) | Nf3 (Knights-before-bishops principle: develops actively, controls e5/d4, delays center commitment flexibly.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e4 — Directly contests d5/e5 simultaneously, opens the f1-bishop diagonal immediately, and grants maximum central presence — the memory heuristic confirms e4 as the strongest initiative move from move one.. R…
- llm.reflect9927ms · $0.0026
full reasoning
Final pick: e4 — Directly contests d5/e5 simultaneously, opens the f1-bishop diagonal immediately, and grants maximum central presence — the memory heuristic confirms e4 as the strongest initiative move from move one.. Rejected: d2d4, g1f3.
9. Commit Commit e4 (e2e4).
2...c5Sonnet
1. Observe Halbzug 2, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 20. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng800ms · fail
5. Plan Phase: opening. Immediately contest or undermine White's e4 pawn — either by direct central counter or flank pressure — while developing minor pieces toward the center and preparing kingside castling within 4 moves. Equa…
- llm.plan27860ms · $0.0151
full reasoning
Phase: opening. Immediately contest or undermine White's e4 pawn — either by direct central counter or flank pressure — while developing minor pieces toward the center and preparing kingside castling within 4 moves. Equalize White's first-move space advantage by fighting for d5 or c5, complete development before White can build a bind, and reach a middlegame where Black's structure is sound. Critical: White controls e4 and can expand with d4 next, seizing full center; Black risks falling behind in development if passive; No immediate tactical threats but conceding the center uncontested leads to long-term positional disadvantage.
6. Candidates Candidates: e5 (Classical symmetrical counter to e4; directly contests center, opens lines for Bc5/Nf6 development toward kingside castle.) | c5 (Sicilian: fights for d4/c5 per plan without conceding center pawn; most st…
- chess.js.legal_moves0ms
- llm.candidates25863ms · $0.0173
full reasoning
Candidates: e5 (Classical symmetrical counter to e4; directly contests center, opens lines for Bc5/Nf6 development toward kingside castle.) | c5 (Sicilian: fights for d4/c5 per plan without conceding center pawn; most statistically successful Black response to 1.e4.) | d5 (Scandinavian: immediately challenges e4 head-on, directly contesting d5 as specified in plan.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c5 — No useful web result, falling back to general principles. Sicilian denies White a free d4 pawn, creates queenside imbalance, and statistically outperforms all other Black responses to 1.e4 at every compe…
- llm.reflect28840ms · $0.0194
full reasoning
Final pick: c5 — No useful web result, falling back to general principles. Sicilian denies White a free d4 pawn, creates queenside imbalance, and statistically outperforms all other Black responses to 1.e4 at every competitive level.. Rejected: e7e5, d7d5.
9. Commit Commit c5 (c7c5).
3.Nf3Sonnet
1. Observe Halbzug 3, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 30. 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-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Develop the king's knight immediately — per the knights-before-bishops heuristic — to pressure d5 and prepare a d4 thrust that directly challenges Black's Sicilian c5 pawn. This opens the center, activate…
- llm.plan28822ms · $0.0189
full reasoning
Phase: opening. Develop the king's knight immediately — per the knights-before-bishops heuristic — to pressure d5 and prepare a d4 thrust that directly challenges Black's Sicilian c5 pawn. This opens the center, activates the dark-squared bishop, and maintains the initiative before Black completes queenside development. Pursue the Open Sicilian structure: establish a strong two-pawn center (e4+d4) per the central-control heuristic, neutralize Black's c5 counterplay, develop all minor pieces harmoniously, and castle kingside within 5–6 moves before Black generates queenside pressure. Critical: Black's c5 pawn directly contests d4 — delaying the d4 push gifts Black free central equality; Knights-before-bishops heuristic is clear: knight development is mandatory before committing the kingside bishop to c4 or b5; No immediate tactical threats from Black — pure development race, White holds the initiative with correct play.
6. Candidates Candidates: Nf3 (Knights-before-bishops heuristic: develops knight to best square, pressures d4/e5, prepares Open Sicilian with d4 next move.) | d4 (Central-control heuristic: immediately contests Black's c5, opens cente…
- chess.js.legal_moves0ms
- llm.candidates9554ms · $0.0038
full reasoning
Candidates: Nf3 (Knights-before-bishops heuristic: develops knight to best square, pressures d4/e5, prepares Open Sicilian with d4 next move.) | d4 (Central-control heuristic: immediately contests Black's c5, opens center for piece activity, establishes two-pawn center.) | Nc3 (Develops knight harmoniously, supports d4 push next move, maintains central initiative without committing bishops prematurely.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf3 — Knights-before-bishops heuristic: Nf3 develops the king's knight to its optimal square, pressures d5/e5, and prepares the d4 thrust next move — the classic Open Sicilian with maximum flexibility.. Rejec…
- llm.reflect8957ms · $0.0031
full reasoning
Final pick: Nf3 — Knights-before-bishops heuristic: Nf3 develops the king's knight to its optimal square, pressures d5/e5, and prepares the d4 thrust next move — the classic Open Sicilian with maximum flexibility.. Rejected: d2d4, b1c3.
9. Commit Commit Nf3 (g1f3).
4...Nc6Sonnet
1. Observe Halbzug 4, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 22. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng93ms · fail
5. Plan Phase: opening. Respond to White's Nf3 — which signals an imminent d4 push — by choosing a development scheme that either blockades or contests the d4 square, develops a minor piece toward the center, and keeps the optio…
- llm.plan57848ms · $0.0299
full reasoning
Phase: opening. Respond to White's Nf3 — which signals an imminent d4 push — by choosing a development scheme that either blockades or contests the d4 square, develops a minor piece toward the center, and keeps the option of cxd4 open to seize the semi-open c-file as counterplay lever within the next 3 moves. Accept asymmetric pawn structure typical of the Sicilian — White gets central space, Black gets c-file counterplay and flexible piece activity — then outplay White in the imbalanced middlegame via queenside pressure while keeping the king safe behind a castled position. Critical: White's Nf3 strongly prepares d4: if Black plays passively, White gets a free d4-d5 bind with no compensation; Black's c5 pawn already contests d4 — the strategic battle is whether Black reinforces that pressure (via ...Nc6 or ...d6+Nf6) or concedes it; According to Chess.com's Sicilian Defense overview, 2...d6 is the most common route (Najdorf/Dragon paths), while 2...Nc6 gives immediate pressure on d4 and 2...e6 preserves bishop flexibility — all are theoretically sound; the choice defines the middlegame character; No immediate tactical threats exist, but falling behind in development by more than 2 tempi against a player ready to open the center with d4 is structurally dangerous.
6. Candidates Candidates: Nc6 (Immediate pressure on d4; classical Sicilian — according to Chess.com overview, most direct way to contest White's central break.) | d6 (Most common Sicilian route per Chess.com; enables ...Nf6 and keeps…
- chess.js.legal_moves0ms
- llm.candidates17924ms · $0.0122
full reasoning
Candidates: Nc6 (Immediate pressure on d4; classical Sicilian — according to Chess.com overview, most direct way to contest White's central break.) | d6 (Most common Sicilian route per Chess.com; enables ...Nf6 and keeps cxd4 option, heading toward Najdorf or Dragon structures.) | e6 (Preserves dark-squared bishop flexibility; Chess.com notes this leads to Kan/Scheveningen — solid development without premature commitment.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nc6 — Nc6 develops a piece AND directly attacks d4, fulfilling both strategic goals simultaneously. After 3.d4 cxd4 4.Nxd4 Nxd4, Black recaptures actively; if White avoids d4, the knight sits centrally with n…
- llm.reflect25336ms · $0.0174
full reasoning
Final pick: Nc6 — Nc6 develops a piece AND directly attacks d4, fulfilling both strategic goals simultaneously. After 3.d4 cxd4 4.Nxd4 Nxd4, Black recaptures actively; if White avoids d4, the knight sits centrally with no concessions.. Rejected: d7d6, e7e6.
9. Commit Commit Nc6 (b8c6).
5.d4Sonnet
1. Observe Halbzug 5, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 28. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Advance d4 immediately to contest Black's c5 pawn, recapture with the knight after cxd4, then develop Bc4 or Bb5 targeting f7 and the knight on c6 — reaching a fully activated Open Sicilian structure with…
- llm.plan29337ms · $0.0183
full reasoning
Phase: opening. Advance d4 immediately to contest Black's c5 pawn, recapture with the knight after cxd4, then develop Bc4 or Bb5 targeting f7 and the knight on c6 — reaching a fully activated Open Sicilian structure within 3 moves. Establish a dominant two-pawn center (e4+d4 → Nxd4) to neutralize Black's Sicilian counterplay, develop all minor pieces harmoniously toward kingside castling, and generate a kingside attack before Black's queenside pressure matures. Critical: Black's Nc6 exerts indirect pressure on d4 — the recapture Nxd4 must be calculated to avoid an immediate Nxd4 trade that cedes the center; After d4 cxd4 Nxd4, Black's likely ...e5 fork (Sveshnikov) or ...d6/...e6 (Scheveningen/Najdorf-adjacent) must inform the follow-up piece placement; Per the central-control heuristic, failing to play d4 now allows Black to consolidate with ...d6 and ...e6 — locking the center on Black's terms and reducing White's dynamic advantage.
6. Candidates Candidates: d4 (Central pawn break forces cxd4 Nxd4, establishing dominant two-pawn center and neutralizing Black's Sicilian counterplay immediately.) | Bc4 (Targets f7 and prepares kingside activity; active piece play p…
- chess.js.legal_moves0ms
- llm.candidates9902ms · $0.0039
full reasoning
Candidates: d4 (Central pawn break forces cxd4 Nxd4, establishing dominant two-pawn center and neutralizing Black's Sicilian counterplay immediately.) | Bc4 (Targets f7 and prepares kingside activity; active piece play per Generation 0 directive, pressures weak diagonal before Black castles.) | Nc3 (Harmonious development supporting d4 push next move; per central-control heuristic, delays Black's consolidation with ...d6/...e6.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d4 — Immediately contests Black's c5 strongpoint. After cxd4 Nxd4, White establishes dominant center (e4+Nd4) and Black's Nc6 pressure on d4 is neutralized — delaying grants Black free ...d6/...e6 consolidati…
- llm.reflect9923ms · $0.0031
full reasoning
Final pick: d4 — Immediately contests Black's c5 strongpoint. After cxd4 Nxd4, White establishes dominant center (e4+Nd4) and Black's Nc6 pressure on d4 is neutralized — delaying grants Black free ...d6/...e6 consolidation.. Rejected: f1c4, b1c3.
9. Commit Commit d4 (d2d4).
6...cxd4Sonnet
1. Observe Halbzug 6, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 27. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng480ms · fail
5. Plan Phase: opening. Capture cxd4 immediately to remove White's d4 anchor and open the c-file as a queenside counterplay lever. After 4.Nxd4, develop with ...Nf6 or ...e6 to contest the center, keep piece activity flexible, a…
- llm.plan57836ms · $0.0389
full reasoning
Phase: opening. Capture cxd4 immediately to remove White's d4 anchor and open the c-file as a queenside counterplay lever. After 4.Nxd4, develop with ...Nf6 or ...e6 to contest the center, keep piece activity flexible, and prepare ...b5-b4 queenside expansion within 3-4 moves. Accept the classic Sicilian asymmetry — White owns the center and attacks kingside, Black owns the c-file and counterattacks queenside — then outplay White in the imbalanced middlegame by using the semi-open c-file and the b5-b4 queenside advance while castling kingside to keep the king safe. Critical: White's d4-e4 pawn duo grants central space — cxd4 eliminates one pillar and forces a piece recapture (Nxd4), giving Black time to develop; After Nxd4, the d4-knight is a key White piece — ...Nc6 or ...e6 lines can challenge it with tempo; According to Chess.com's Sicilian overview, Black's primary queenside plan involves b7-b5 expansion; this requires ...a6 or ...d6 prep, so the 4th-move system choice (Classical/Taimanov/Scheveningen) must be settled now; Own weakness: undeveloped kingside (Ng8, Bf8) means castling is not immediate — White could build a quick attacking setup if piece development is delayed.
6. Candidates Candidates: cxd4 (Plan's primary move: removes d4 anchor, opens c-file for queenside counterplay, forces piece recapture Nxd4.) | Nf6 (Develops kingside knight, pressures e4, enables early castling while keeping cxd4 in …
- chess.js.legal_moves0ms
- llm.candidates30021ms · $0.0189
full reasoning
Candidates: cxd4 (Plan's primary move: removes d4 anchor, opens c-file for queenside counterplay, forces piece recapture Nxd4.) | Nf6 (Develops kingside knight, pressures e4, enables early castling while keeping cxd4 in reserve.) | d6 (Classical Sicilian anchor; prepares ...Nf6, ...e6, and b5-b4 queenside expansion without conceding center prematurely.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: cxd4 — Eliminates White's d4 anchor immediately, forcing Nxd4 (piece recapture) and opening the c-file for queenside counterplay. Delaying cxd4 risks White playing d5 for free, ceding Black crucial queenside …
- llm.reflect28972ms · $0.0225
full reasoning
Final pick: cxd4 — Eliminates White's d4 anchor immediately, forcing Nxd4 (piece recapture) and opening the c-file for queenside counterplay. Delaying cxd4 risks White playing d5 for free, ceding Black crucial queenside space.. Rejected: g8f6, d7d6.
9. Commit Commit cxd4 (c5d4).
7.Nxd4Sonnet
1. Observe Halbzug 7, Weiss am Zug. Phase: Eroeffnung. Schwarz +1 Punkte. Legale Zuege: 37. Criticality: 0.40.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Recapture on d4 with the knight to restore central parity, then deploy Bc4 or Bb5 targeting critical squares — reaching the core Open Sicilian tabiya within 2 moves. Black's Nc6 will likely challenge the …
- llm.plan33006ms · $0.0251
full reasoning
Phase: opening. Recapture on d4 with the knight to restore central parity, then deploy Bc4 or Bb5 targeting critical squares — reaching the core Open Sicilian tabiya within 2 moves. Black's Nc6 will likely challenge the d4-knight; be prepared for the Nxd4 trade or a Nf5-retreat square. Establish the classic Open Sicilian structure (Nxd4 + Bc4/Bb5 + 0-0) to generate a kingside attack before Black's queenside pawn majority and Nc6 counterplay matures into real threats. Critical: Black holds a d4-pawn that must be recaptured immediately — each tempo lost here gifts Black free development; Nc6 directly attacks any knight landing on d4 — the recapture must anticipate the Nxd4 trade and not leave a structural weakness; Memory heuristic [OPENING central control]: Nxd4 re-anchors control of the d4/e4 center; without it, Black's pawn majority activates dangerously early; Memory heuristic [OPENING knights before bishops]: Nxd4 is the correct knight deployment before committing the f1-bishop — the bishop's best diagonal (c4 or b5) depends on Black's next response.
6. Candidates Candidates: Nxd4 (Mandatory recapture restoring central parity; anchors d4/e4 control per OPENING central control heuristic, anticipates Nxd4 trade.) | Bc4 (Develops bishop to active diagonal targeting f7; classical Open…
- chess.js.legal_moves0ms
- llm.candidates9603ms · $0.0040
full reasoning
Candidates: Nxd4 (Mandatory recapture restoring central parity; anchors d4/e4 control per OPENING central control heuristic, anticipates Nxd4 trade.) | Bc4 (Develops bishop to active diagonal targeting f7; classical Open Sicilian setup per knights-before-bishops heuristic — but only after Nxd4.) | Nc3 (Develops queenside knight, supports e4, prepares coordinated central pressure; valid alternative if Nxd4 trade leaves d4 weak.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxd4 — Mandatory recapture: Black's pawn on d4 must be taken immediately. Per OPENING central control heuristic, Nxd4 re-anchors e4/d4 center. Delaying gifts Black free tempo and activates their pawn majority…
- llm.reflect9525ms · $0.0031
full reasoning
Final pick: Nxd4 — Mandatory recapture: Black's pawn on d4 must be taken immediately. Per OPENING central control heuristic, Nxd4 re-anchors e4/d4 center. Delaying gifts Black free tempo and activates their pawn majority.. Rejected: f1c4, b1c3.
9. Commit Commit Nxd4 (f3d4).
8...e5Sonnet
1. Observe Halbzug 8, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 25. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng1041ms · fail
5. Plan Phase: opening. Stake out a Sicilian system: either Nf6 heading toward Classical or Sveshnikov (Nc6+e5 per ChessBase's analysis — Nc6 was placed precisely for this e5 challenge), or e6 for Taimanov solidity with a6-b5 qu…
- llm.plan102868ms · $0.0632
full reasoning
Phase: opening. Stake out a Sicilian system: either Nf6 heading toward Classical or Sveshnikov (Nc6+e5 per ChessBase's analysis — Nc6 was placed precisely for this e5 challenge), or e6 for Taimanov solidity with a6-b5 queenside expansion queued. Develop remaining minor pieces and castle kingside within 3 moves before White establishes f4. Exploit the semi-open c-file as the primary counterplay lever — Qc7 and Rc8 pressure — while White's space advantage and kingside attack via f4-f5 are neutralized by active piece coordination and the b5-b4 pawn advance opening queenside lines. Critical: White's Nd4-Nb5 can leap to pressure c7/d6 if Black delays development one move too long; f4-f5 kingside attack is White's structural goal — king must castle before that wave arrives; Choosing Nf6+e5 (Sveshnikov aggression) vs e6+a6 (Taimanov queenside expansion) fundamentally shapes the entire game's imbalance structure.
6. Candidates Candidates: Nf6 (Develops toward Classical/Sveshnikov; pressures e4 before White consolidates with Nc3 and f4.) | e6 (Taimanov solidity; queues a6-b5-b4 queenside expansion while keeping c-file counterplay via Qc7/Rc8.) …
- chess.js.legal_moves0ms
- llm.candidates42792ms · $0.0337
full reasoning
Candidates: Nf6 (Develops toward Classical/Sveshnikov; pressures e4 before White consolidates with Nc3 and f4.) | e6 (Taimanov solidity; queues a6-b5-b4 queenside expansion while keeping c-file counterplay via Qc7/Rc8.) | e5 (Direct Sveshnikov stake; Nc6 placed precisely for this e5 challenge, denying White f4 advance.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e5 — Nc6 was placed precisely for this e5 thrust per ChessBase Sveshnikov analysis cited in the plan. Immediately evicts Nd4, prevents White's f4 advance permanently, and stakes central space — the plan's pri…
- llm.reflect43383ms · $0.0307
full reasoning
Final pick: e5 — Nc6 was placed precisely for this e5 thrust per ChessBase Sveshnikov analysis cited in the plan. Immediately evicts Nd4, prevents White's f4 advance permanently, and stakes central space — the plan's primary anti-kingside-attack goal.. Rejected: g8f6, e7e6.
9. Commit Commit e5 (e7e5).
9.Nb5Sonnet
1. Observe Halbzug 9, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 41. 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-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Relocate the attacked Nd4 to an aggressive square — Nb5 is the critical choice, threatening Nd6+ (fork Qd8/Rh8) and denying Black the d6-square. Follow with Bc4 or Bc1-e3 development and castle short with…
- llm.plan55601ms · $0.0433
full reasoning
Phase: opening. Relocate the attacked Nd4 to an aggressive square — Nb5 is the critical choice, threatening Nd6+ (fork Qd8/Rh8) and denying Black the d6-square. Follow with Bc4 or Bc1-e3 development and castle short within 2-3 moves. Exploit Black's missing c-pawn and d5-hole (Kalashnikov structure) by installing a knight on d5 or d6, generating lasting piece activity before Black's queenside majority and Nc6 can organize a central break with d5. Critical: Nd4 is attacked by Pe5 — must move this turn, no exception; Nb5 threatens Nd6+ fork on Qd8/Rh8: Black must react defensively, gifting White tempo; Memory heuristic: central control — Nb5 keeps pressure on d6 and indirectly on e5, preserving White's spatial edge; Memory heuristic: knights before bishops — Nb1 still undeveloped; after Nb5 the priority shifts to Nb1-c3 or direct Bc4 to reinforce center; Black's counterplay: after Nb5, d6 and a6 both hit back; Be6 or a6 are natural responses — be prepared to recalculate after Nb5 a6 Nd6+ or Nb5-c3.
6. Candidates Candidates: Nb5 (Threatens Nd6+ fork on Qd8/Rh8, exploiting Black's d6-hole (Kalashnikov d5-weakness); forces defensive reaction and gains tempo.) | Bc4 (Knights before bishops already addressed; Bc4 targets f7, applies …
- chess.js.legal_moves0ms
- llm.candidates10457ms · $0.0040
full reasoning
Candidates: Nb5 (Threatens Nd6+ fork on Qd8/Rh8, exploiting Black's d6-hole (Kalashnikov d5-weakness); forces defensive reaction and gains tempo.) | Bc4 (Knights before bishops already addressed; Bc4 targets f7, applies pressure on Black's kingside while developing toward castle short.) | Nf5 (Active piece play — Nf5 eyes d6 and g7, creating multiple threats; fits Generation-0 directive of multiple-threat moves with coordinated pieces.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nb5 — Threatens Nd6+ forking Qd8/Rh8, forcing Black into immediate defensive reaction and gaining tempo. Exploits the d6-hole (central control heuristic) — main Kalashnikov line with controlled aggression per…
- llm.reflect39391ms · $0.0306
full reasoning
Final pick: Nb5 — Threatens Nd6+ forking Qd8/Rh8, forcing Black into immediate defensive reaction and gaining tempo. Exploits the d6-hole (central control heuristic) — main Kalashnikov line with controlled aggression per Generation-0 directive.. Rejected: f1c4, d4f5.
9. Commit Commit Nb5 (d4b5).
10...d6Sonnet
1. Observe Halbzug 10, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 33. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search (opening, SearXNG + summary): [1] Pawn structure - Wikipedia ... Openings: Primary: Sicilian Dragon. Other: Pirc, King's English (with colors reversed). Character: Either a razor sharp middlegame with opposite…
- web_search.searxng1226ms
- llm.research_summary60037ms · fail: Claude CLI subprocess timed out after 60000ms
full reasoning
Web search (opening, SearXNG + summary): [1] Pawn structure - Wikipedia ... Openings: Primary: Sicilian Dragon. Other: Pirc, King's English (with colors reversed). Character: Either a razor sharp middlegame with opposite side castling or a moderately sharp game with same side cast…
5. Plan Phase: opening. Play ...d6 immediately to support e5 and prevent the Nd6+ fork, then chase Nb5 with ...a6, develop Nf6 and Be7, and castle kingside before White can establish N1c3-Nd5 domination of the central outpost. E…
- llm.plan65472ms · $0.0502
full reasoning
Phase: opening. Play ...d6 immediately to support e5 and prevent the Nd6+ fork, then chase Nb5 with ...a6, develop Nf6 and Be7, and castle kingside before White can establish N1c3-Nd5 domination of the central outpost. Embrace the Sveshnikov structural concession — backward d6 pawn, chronic d5 weakness — in exchange for the e5 space lever and dynamic queenside counterplay via a6-b5-b4, keeping White's knight offside while opening lines against the queenside. Critical: White's immediate threat: Nd6+ (if d6 is delayed) forks king and Bf8, winning material; d5 square becomes a permanent White outpost once ...d6 is committed — must be compensated by active piece play and the b5-b4 advance; No useful web result for Sveshnikov position specifics; falling back to established Sveshnikov/Pelikan theory: 5...d6 is the main-line consensus response endorsed by prior ChessBase reference in the continuity plan.
6. Candidates Candidates: d6 (Main Sveshnikov response: supports e5, prevents Nd6+ fork, accepts structural concession for dynamic counterplay.) | a6 (Immediately chases Nb5 offside, enabling b5-b4 queenside expansion per Sveshnikov p…
- chess.js.legal_moves0ms
- llm.candidates8903ms · $0.0035
full reasoning
Candidates: d6 (Main Sveshnikov response: supports e5, prevents Nd6+ fork, accepts structural concession for dynamic counterplay.) | a6 (Immediately chases Nb5 offside, enabling b5-b4 queenside expansion per Sveshnikov plan.) | Nf6 (Natural development attacking e4, consistent with Sveshnikov kingside setup before castling.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d6 — Eliminates the immediate Nd6+ fork threat (White knight on b5 would leap to d6+ next move winning Bf8), supports the e5 pawn, and enters main Sveshnikov theory where Black's e5-space advantage compensate…
- llm.reflect16837ms · $0.0031
full reasoning
Final pick: d6 — Eliminates the immediate Nd6+ fork threat (White knight on b5 would leap to d6+ next move winning Bf8), supports the e5 pawn, and enters main Sveshnikov theory where Black's e5-space advantage compensates the d5 outpost concession.. Rejected: a7a6, g8f6.
9. Commit Commit d6 (d7d6).
11.N1c3Sonnet
1. Observe Halbzug 11, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 41. Criticality: 0.40.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search14ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Develop Nb1→c3 immediately — per the 'knights before bishops' heuristic, the second knight must activate now to support Nb5 and contest d5. Then Bc4 or Be2+Be3 to coordinate, castle kingside. The d5-hole …
- llm.plan48313ms · $0.0403
full reasoning
Phase: opening. Develop Nb1→c3 immediately — per the 'knights before bishops' heuristic, the second knight must activate now to support Nb5 and contest d5. Then Bc4 or Be2+Be3 to coordinate, castle kingside. The d5-hole and Black's backward d6-pawn are permanent targets; threatening Nd5 that Black cannot simply trade off. Leverage the Kalashnikov d5-hole: route Nb1→c3→d5 while the bishop battery on c4/e3 or c4/g5 maximizes piece pressure on d6 and the uncastled Black king, outpacing Black's queenside majority before ...a6-...b5 can roll. Critical: Black will play ...a6 to kick Nb5 — must have clear retreat (Na3 or Nd6+ if d6 moves, or back to c3 with compensation); Black's ...Nf6 develops with tempo attacking e4 — decide between Bg5 pin or f3/Be2 defense before it arrives; Per 'central control' heuristic, e4+d5 dominance is the strategic anchor — do not let Black play ...d5 equalizing break.
6. Candidates Candidates: N1c3 ('Knights before bishops' heuristic: activates second knight, supports Nb5, prepares Nd5 dominance over the d5-hole.) | Bc4 ('Central control' heuristic: bishop battery on c4/e3 targets d5 and f7, maximi…
- chess.js.legal_moves0ms
- llm.candidates38918ms · $0.0307
full reasoning
Candidates: N1c3 ('Knights before bishops' heuristic: activates second knight, supports Nb5, prepares Nd5 dominance over the d5-hole.) | Bc4 ('Central control' heuristic: bishop battery on c4/e3 targets d5 and f7, maximises pressure on backward d6-pawn before Black castles.) | Nxd6+ (Immediate tactical gain with check wins the backward d6-pawn; knight lands on d5-hole, disrupting Black's uncastled king.)7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: N1c3 — Knights before bishops heuristic: N1c3 activates the second knight and immediately threatens Nd5, exploiting the permanent d5-hole. Black cannot ignore this; it forces a concession before completing de…
- llm.reflect53475ms · $0.0417
full reasoning
Final pick: N1c3 — Knights before bishops heuristic: N1c3 activates the second knight and immediately threatens Nd5, exploiting the permanent d5-hole. Black cannot ignore this; it forces a concession before completing development, maintaining central control heuristic via e4+d5 dominance.. Rejected: f1c4, b5d6.
9. Commit Commit N1c3 (b1c3).
12...a6Sonnet
1. Observe Halbzug 12, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 35. Criticality: 0.40.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng523ms · fail
5. Plan Phase: opening. Chase Nb5 immediately with a6, forcing White into the Na3 or Nd5 choice; then develop Nf6 and Be7 to complete kingside development and castle before White establishes an uncontested d5 outpost. After cast…
- llm.plan81199ms · $0.0526
full reasoning
Phase: opening. Chase Nb5 immediately with a6, forcing White into the Na3 or Nd5 choice; then develop Nf6 and Be7 to complete kingside development and castle before White establishes an uncontested d5 outpost. After castling, prepare b5 queenside expansion or f5 kingside break depending on White's knight routing. Embrace the Sveshnikov concession — accept the chronic d5 weakness and backward d6 pawn — in exchange for the e5 space lever and dynamic counterplay via a6-b5 queenside expansion and the thematic f5 pawn break, exploiting White's overextended Nb5 while Black's mobile pawn mass compensates for structural inferiority. Critical: Immediate tactical threat: Nb5-d6+ fork wins material if a6 is delayed even one move — this is a hard constraint on move order; White's d5 square is the permanent strategic battleground; if Nd5 lands unopposed after Na3, Black's queenside counterplay is pre-empted before it starts; Black's kingside is fully undeveloped (Ng8, Bf8 idle), so castling must occur within 3 moves or king safety becomes a crisis with White's two active knights; According to chessdoctrine.com Sveshnikov guide: after a6 White typically plays Bg5 — Black must not allow the pin on Nf6 to paralyze the kingside before Be7 breaks it.
6. Candidates Candidates: a6 (Forces Nb5 to retreat, preventing Nd6+ fork — hard move-order constraint per Sveshnikov theory.) | Nf6 (Develops kingside knight toward center, enabling castling within plan's 3-move window.) | Be7 (Break…
- chess.js.legal_moves0ms
- llm.candidates21752ms · $0.0154
full reasoning
Candidates: a6 (Forces Nb5 to retreat, preventing Nd6+ fork — hard move-order constraint per Sveshnikov theory.) | Nf6 (Develops kingside knight toward center, enabling castling within plan's 3-move window.) | Be7 (Breaks Bg5 pin preemptively and clears f8 for castling, addressing chessdoctrine.com Sveshnikov guide warning.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: a6 — Hard tactical constraint: Nd6+ check forces king to move, then Nxf7 forks Qd8+Rh8 or Nxc8 wins the bishop. According to Kalashnikov/Sveshnikov theory (chesslance.com, ppqty.com), a6 is the only legal mov…
- llm.reflect84321ms · $0.0631
full reasoning
Final pick: a6 — Hard tactical constraint: Nd6+ check forces king to move, then Nxf7 forks Qd8+Rh8 or Nxc8 wins the bishop. According to Kalashnikov/Sveshnikov theory (chesslance.com, ppqty.com), a6 is the only legal move that defuses this fork before it fires.. Rejected: g8f6, f8e7.
9. Commit Commit a6 (a7a6).
13.Nc7+Sonnet
1. Observe Halbzug 13, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 40. Criticality: 0.40.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search24ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search4ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Play Nd5 immediately — Black's ...a6 is already on the board, Nb5 cannot linger. The 'OPENING central control' heuristic demands occupying d5 before Black can organize ...b5 or ...Nf6. Follow with Bc4 or …
- llm.plan60435ms · $0.0485
full reasoning
Phase: opening. Play Nd5 immediately — Black's ...a6 is already on the board, Nb5 cannot linger. The 'OPENING central control' heuristic demands occupying d5 before Black can organize ...b5 or ...Nf6. Follow with Bc4 or Bg5 to pile pressure on d6, then castle kingside in two moves. Cement the Nd5 outpost as a permanent strategic pillar: if Black captures exd5 the recapture opens lines and fixes a strong passed pawn; if Black ignores it, the d6 pawn becomes a chronic target under coordinated bishop-and-knight pressure. Critical: Pa6 already played — Nb5 must commit now; Nd5 is the only active square consistent with 'knights before bishops' heuristic; After Nd5, Black's ...Nxd5 exd5 opens the d-file and gives White a strong center — favorable recapture structure; Black's ...b5 queenside counterplay is cut off once Nd5 lands, removing the b5-push tempo; Pe4 loses its natural defender when Nb5 moves — Be2 or f3 must follow to avoid ...Nf6 winning the pawn.
6. Candidates Candidates: Nxd6+ (Wins the d6 pawn with check; after Ke7, active piece play heuristic satisfied with immediate material gain.) | Nc7+ (Forks king and Ra8; forces Ke7 then Nxa8, winning the exchange with controlled tacti…
- chess.js.legal_moves0ms
- llm.candidates53433ms · $0.0423
full reasoning
Candidates: Nxd6+ (Wins the d6 pawn with check; after Ke7, active piece play heuristic satisfied with immediate material gain.) | Nc7+ (Forks king and Ra8; forces Ke7 then Nxa8, winning the exchange with controlled tactical calculation.) | Nd5 (Occupies the central d5 outpost per plan; Nb5 retreats threat resolved, multiple threats created on f6 and c7.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nc7+ — Forks king and Ra8 simultaneously. After Ke7, Nxa8 wins the exchange (rook for knight) — forced material gain within two moves, satisfying the 'calculate forced gain within three moves' directive.. Rej…
- llm.reflect11406ms · $0.0030
full reasoning
Final pick: Nc7+ — Forks king and Ra8 simultaneously. After Ke7, Nxa8 wins the exchange (rook for knight) — forced material gain within two moves, satisfying the 'calculate forced gain within three moves' directive.. Rejected: b5d6, c3d5.
9. Commit Commit Nc7+ (b5c7).
14...Kd7Sonnet
1. Observe Halbzug 14, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 3. Schach! Criticality: 0.75.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng2326ms · fail
5. Plan Phase: opening. Halbzug 14, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 3. Schach! Criticality: 0.75. No memory context available. Plan: develop pieces, control the center, castle soon. [LLM-Error: …
full reasoning
Phase: opening. Halbzug 14, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 3. Schach! Criticality: 0.75. No memory context available. Plan: develop pieces, control the center, castle soon. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Kd7 (King escapes check, loses only rook on a8 (−5pts) vs queen-for-knight blunder; knight on a8 risks being trapped.) | Ke7 (King escapes check, same rook loss as Kd7 but king on open e-file is slightly more…
- chess.js.legal_moves0ms
- llm.candidates65324ms · $0.0270
full reasoning
Candidates: Kd7 (King escapes check, loses only rook on a8 (−5pts) vs queen-for-knight blunder; knight on a8 risks being trapped.) | Ke7 (King escapes check, same rook loss as Kd7 but king on open e-file is slightly more exposed to future attacks.) | Qxc7 (Captures knight but trades queen (9pts) for knight (3pts) — net −6pts material loss, clearly worst option.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd7 — King escapes check, loses only rook on a8 (−5pts) vs queen-for-knight blunder; knight on a8 risks being trapped.. Rejected: e8e7, d8c7. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Kd7 (e8d7).
15.Qxd6+Sonnet
1. Observe Halbzug 15, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 44. Criticality: 0.40.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Exploit Nc7 fork pressure on Ra8 while developing Bc1 and Bf1 toward the exposed d7 king. Force Black into passive defense, then castle kingside and open attacking lines against the stranded king in 3–5 m…
- llm.plan48267ms · $0.0362
full reasoning
Phase: opening. Exploit Nc7 fork pressure on Ra8 while developing Bc1 and Bf1 toward the exposed d7 king. Force Black into passive defense, then castle kingside and open attacking lines against the stranded king in 3–5 moves. Convert Black's permanent king exposure on d7 — referenced by heuristic OPENING central control: our e4-pawn and Nc7 together deny Black any safe regrouping square — into a mating attack or decisive material gain before Black can activate Bg8 or Qd8. Critical: Nc7 attacks Ra8: Black must lose material or displace the king further; Black king on d7 is the permanent target — every developing move should point there; Heuristic OPENING knights before bishops: our knights are maximally active; bishops on c1 and f1 must now join the attack (Bc4 targets d5/f7 diagonal, Bg5 pressures Nc6 and d8); White must castle kingside within 2 moves to remove e1 king from open files; Risk: if White plays slowly, Black plays ...Nge7 or ...Nb4 and begins counterplay against c2.
6. Candidates Candidates: Qxd6+ (Directly attacks exposed d7-king with check, wins pawn, forces king to worse square — heuristic: permanent king exposure on d7 must be converted immediately.) | Bc4 (Develops bishop to d5/f7 diagonal a…
- chess.js.legal_moves0ms
- llm.candidates30450ms · $0.0211
full reasoning
Candidates: Qxd6+ (Directly attacks exposed d7-king with check, wins pawn, forces king to worse square — heuristic: permanent king exposure on d7 must be converted immediately.) | Bc4 (Develops bishop to d5/f7 diagonal as planned; heuristic OPENING bishops join attack — prepares castling kingside and battery against stranded king.) | Nxa8 (Wins the exchange; heuristic: Nc7 attacks Ra8 — Black must lose material. Nc7 has served its purpose, cashing in is concrete gain.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qxd6+ — Captures the d6-pawn with check — wins material AND forces the king to a worse square, enabling Nb5+ next turn (attacks c7 again, wins Ra8 after Kb8 Nxa8). Two heuristics fire: permanent king exposure…
- llm.reflect68801ms · $0.0545
full reasoning
Final pick: Qxd6+ — Captures the d6-pawn with check — wins material AND forces the king to a worse square, enabling Nb5+ next turn (attacks c7 again, wins Ra8 after Kb8 Nxa8). Two heuristics fire: permanent king exposure on d7 must be converted immediately; Nc7 fork pressure creates decisive follow-up threats.. Rejected: f1c4, c7a8.
9. Commit Commit Qxd6+ (d1d6).
16...Bxd6Sonnet
1. Observe Halbzug 16, Schwarz am Zug. Phase: Mittelspiel. Weiss +1 Punkte. Legale Zuege: 2. Schach! Criticality: 0.60.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng429ms · fail
5. Plan Phase: middlegame. Forced queen recapture is the only legal response to the check. Immediately after escaping check, activate the g8-knight and undeveloped bishops to fight for squares before White's c7-knight generates …
- llm.plan117956ms · $0.0927
full reasoning
Phase: middlegame. Forced queen recapture is the only legal response to the check. Immediately after escaping check, activate the g8-knight and undeveloped bishops to fight for squares before White's c7-knight generates a second wave of tactical threats. After the forced queen exchange, trade pieces aggressively to simplify into an endgame where Black's material equality partially compensates for the chronically exposed king and lost castling rights. Critical: White knight on c7 stays active after queens vanish and will threaten forks on a6, a8, b5, e6; Black king has no castling rights and no safe central square — every tempo spent not developing is lethal; g8-knight and both Black bishops are completely idle — development paralysis will allow White to regroup and renew the attack.
6. Candidates Candidates: Bxd6 (Recaptures queen while developing the idle f8-bishop; king stays on d7, less exposed than Kxd6.) | Kxd6 (Forced recapture with king; exposes king on d6 but is the only alternative to Bxd6.)
- chess.js.legal_moves0ms
- llm.candidates15802ms · $0.0098
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxd6 — Bishop recapture keeps king on d7, avoiding the immediate Nc3-b5+ check that hits the king on d6 after Kxd6; also develops the idle f8-bishop, the only piece that can recapture without worsening king e…
- llm.reflect75767ms · $0.0515
full reasoning
Final pick: Bxd6 — Bishop recapture keeps king on d7, avoiding the immediate Nc3-b5+ check that hits the king on d6 after Kxd6; also develops the idle f8-bishop, the only piece that can recapture without worsening king exposure.. Rejected: d7d6.
9. Commit Commit Bxd6 (f8d6).
17.Nxa8Sonnet
1. Observe Halbzug 17, Weiss am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 37. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Exploit Nc7xa8 to win the exchange OR develop Bf1-d3 to directly target the d7 king before taking Ra8; castle kingside within 2 moves; redeploy Nc3 toward e2-f4 or d5 to tighten the net around the expo…
- llm.plan61969ms · $0.0489
full reasoning
Phase: middlegame. Exploit Nc7xa8 to win the exchange OR develop Bf1-d3 to directly target the d7 king before taking Ra8; castle kingside within 2 moves; redeploy Nc3 toward e2-f4 or d5 to tighten the net around the exposed king Convert Black's permanently misplaced king on d7 into a mating attack or decisive material avalanche — referenced by open-file rooks heuristic: once castled, Ra1 or Rh1 on the d-file will be devastating — before Black's Ng8 or Qd8 can activate and create queen-side counterplay Critical: Nc7 attacks Ra8 — Black must lose material or displace king further, referenced by king-safety imbalance; Black king on d7 is the permanent target; Bc1-g5 or Bf1-d3 both create discovered-attack threats; White is uncastled — delay costs tempo; must castle within 2 moves to avoid Black stabilizing; Black's Nc6+Bd6 are active and could support e5-e4 counterplay if White wastes time.
6. Candidates Candidates: Nxa8 (Wins the exchange immediately per plan; Black king on d7 cannot recapture safely, giving White decisive material edge.) | Bd3 (Directly targets exposed d7 king along diagonal, clears f1 for castling nex…
- chess.js.legal_moves0ms
- llm.candidates25808ms · $0.0199
full reasoning
Candidates: Nxa8 (Wins the exchange immediately per plan; Black king on d7 cannot recapture safely, giving White decisive material edge.) | Bd3 (Directly targets exposed d7 king along diagonal, clears f1 for castling next move — both plan priorities in one tempo.) | Bg5 (Referenced in plan as discovered-attack threat creator; pressures d8 queen and Black's coordination while developing toward kingside castle.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxa8 — Wins the exchange immediately (Rook vs Knight). Black's king already moved — permanently uncastleable on d7. After Qxa8, White plays Bd3 then O-O with decisive material + king-safety imbalance per plan…
- llm.reflect101449ms · $0.0783
full reasoning
Final pick: Nxa8 — Wins the exchange immediately (Rook vs Knight). Black's king already moved — permanently uncastleable on d7. After Qxa8, White plays Bd3 then O-O with decisive material + king-safety imbalance per plan.. Rejected: f1d3, c1g5.
9. Commit Commit Nxa8 (c7a8).
18...Nd4Sonnet
1. Observe Halbzug 18, Schwarz am Zug. Phase: Mittelspiel. Schwarz +3 Punkte. Legale Zuege: 37. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng349ms · fail
5. Plan Phase: middlegame. Block Na8's route to b6 (which would attack Qd8) by activating Ng8 to e7; keep the center closed so White's two rooks find no open files; use the queen's maneuverability advantage to generate queenside…
- llm.plan105800ms · $0.0702
full reasoning
Phase: middlegame. Block Na8's route to b6 (which would attack Qd8) by activating Ng8 to e7; keep the center closed so White's two rooks find no open files; use the queen's maneuverability advantage to generate queenside pressure once the king is sheltered by the knight and bishop tandem. Per the Chess.com 'Queen vs. 2 Rooks' framework, Black's queen thrives in closed or semi-closed positions where rooks lack open files — so resist any file opening, build a defensive piece wall around Kd7 with Ng8-e7 and Bc8, then convert the reported +3 material edge in a stable structure where White's rooks remain passive. Critical: Na8 threatens Nb6 immediately, forking Qd8 and destabilizing the entire queenside; this must be the top defensive priority; According to TheChessWorld's centralized-king principles, White's ideal is to pry open the e-file or d-file against Kd7 — Black must keep e5 anchored and avoid pawn exchanges that crack the center; Ng8 and Bc8 are still idle; every tempo spent on non-developing moves worsens the king shelter deficit and lets White coordinate Ra1 and Rh1 on open files.
6. Candidates Candidates: Nd4 (centre score=1) | Qe8 (development score=0) | Qf8 (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: Nd4 — centre score=1. Rejected: d8e8, d8f8. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Nd4 (c6d4).
19.Nb6+Sonnet
1. Observe Halbzug 19, Weiss am Zug. Phase: Mittelspiel. Schwarz +3 Punkte. Legale Zuege: 32. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Defuse the Nd4-c2+ fork threat (attacks Ke1 AND Ra1 simultaneously) as the highest priority, then evacuate Bf1 to enable O-O, and finally double rooks on the d-file against the exposed Black king — all…
- llm.plan115948ms · $0.0841
full reasoning
Phase: middlegame. Defuse the Nd4-c2+ fork threat (attacks Ke1 AND Ra1 simultaneously) as the highest priority, then evacuate Bf1 to enable O-O, and finally double rooks on the d-file against the exposed Black king — all within 4 moves Convert the permanently exposed Black king on d7 into a mating net via the d-file (open-file rooks heuristic: rook on d1 after castling is structurally devastating against a king that cannot escape to e8/f8), accepting the material deficit as tempo cost for the initiative Critical: CRITICAL: Nd4-c2+ is an immediate fork threat — knight lands on c2, gives check to Ke1 AND attacks Ra1 for free exchange; White must neutralize Nd4 or interpose this move; Bf1 blocks O-O — bishop must be developed (Bf1-d3 or Bf1-e2) before castling is possible; Na8 is stranded and contributes nothing; must eventually route via Nb6 back into play; Black's Qd8 and Bd6 cover d7 king passively but queen has no active role yet — window to exploit before Ng8 activates.
6. Candidates Candidates: Nb6+ (Activates stranded Na8 with check on Kd7; forces king off d-file, delaying Nc2+ fork; threatens Nd5+ next.) | Bb5+ (Evacuates Bf1 enabling O-O (open-file rooks plan); check forces king displacement, buy…
- chess.js.legal_moves0ms
- llm.candidates95911ms · $0.0779
full reasoning
Candidates: Nb6+ (Activates stranded Na8 with check on Kd7; forces king off d-file, delaying Nc2+ fork; threatens Nd5+ next.) | Bb5+ (Evacuates Bf1 enabling O-O (open-file rooks plan); check forces king displacement, buying tempo vs Nc2+ fork.) | Bxa6 (Captures hanging a6-pawn, develops Bf1 off back rank; heuristic-flagged material gain with active bishop placement.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nb6+ — Activates stranded Na8 with check on Kd7; forces king off d-file, delaying Nc2+ fork; threatens Nd5+ next.. Rejected: f1b5, f1a6. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Nb6+ (a8b6).
20...Ke8Sonnet
1. Observe Halbzug 20, Schwarz am Zug. Phase: Mittelspiel. Schwarz +3 Punkte. Legale Zuege: 6. Schach! Criticality: 0.25.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng113ms · fail
5. Plan Phase: middlegame. Resolve the Nb6 check immediately (only 6 legal moves). Qxb6 captures the attacker and widens material lead but places queen on rim; king retreat Ke7/Ke8 shelters the king and preserves the piece-wall …
- llm.plan81909ms · $0.0523
full reasoning
Phase: middlegame. Resolve the Nb6 check immediately (only 6 legal moves). Qxb6 captures the attacker and widens material lead but places queen on rim; king retreat Ke7/Ke8 shelters the king and preserves the piece-wall plan (Ng8-e7 follow-up from previous plan). Per the Chess.com 'King Safety' principle found in research — king safety outweighs short-term material gain when king is exposed without castling rights. Stabilize the Black king away from the center after escaping check, then exploit the +3 material advantage by simplifying into a winning endgame — the Chess.com 'How to Convert an Advantage' framework confirms: when ahead in material, trade pieces and deny opponent counterplay. Critical: Nb6+ is the only active White threat but it forces tempo loss on Black's development; Black king has zero shelter and no castling rights — any king-move must anticipate follow-up Nc3 or Bc1 discoveries; Black Nd4 outpost must be preserved at all costs — it paralyzes White's center and threatens forks; White rooks are still dormant on a1/h1; Black must avoid opening the a- or h-file in the response sequence.
6. Candidates Candidates: Ke8 (King retreats to safety, preserves Nd4 outpost; Chess.com king safety principle: shelter over material when exposed.) | Ke7 (King centralizes safely, prepares Ng8-e7 development; maintains +3 material ad…
- chess.js.legal_moves0ms
- llm.candidates9911ms · $0.0036
full reasoning
Candidates: Ke8 (King retreats to safety, preserves Nd4 outpost; Chess.com king safety principle: shelter over material when exposed.) | Ke7 (King centralizes safely, prepares Ng8-e7 development; maintains +3 material advantage per conversion framework.) | Qxb6 (Captures the checking knight, widens material lead; queen on rim is suboptimal but eliminates immediate threat.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke8 — King retreats to safety, preserves Nd4 outpost; Chess.com king safety principle: shelter over material when exposed.. Rejected: d7e7, d8b6. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Ke8 (d7e8).
21.Bb5+Sonnet
1. Observe Halbzug 21, Weiss am Zug. Phase: Mittelspiel. Schwarz +3 Punkte. Legale Zuege: 36. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Defuse the Nd4-c2+ fork by relocating Ra1 to d1 (simultaneously removing the fork target AND occupying the d-file), then evacuate Bf1 to enable O-O, and complete a rook battery on the d-file against th…
- llm.plan77786ms · $0.0596
full reasoning
Phase: middlegame. Defuse the Nd4-c2+ fork by relocating Ra1 to d1 (simultaneously removing the fork target AND occupying the d-file), then evacuate Bf1 to enable O-O, and complete a rook battery on the d-file against the stuck Black king within 3 moves Accept the material deficit as tempo-cost and convert Black's permanently uncastled king on e8 into a mating net via the d-file — the open-file rooks heuristic (Rd1+Rhd1 battery) is structurally decisive when the enemy king cannot flee to f8 or g8 due to pawns and piece congestion Critical: Nd4-c2+ is an immediate fork on Ke1+Ra1 — highest-priority defuse before any other plan proceeds; Bf1 must vacate for O-O — every tempo lost here lets Black consolidate the Nd4 outpost; Black king on e8 cannot castle queenside safely with Nb6 dominating d7/c8 — the king is a long-term target provided White completes the rook battery via the d-file open-file rooks pattern.
6. Candidates Candidates: Rb1 (Removes Ra1 from Nd4-c2+ fork target — highest-priority defuse per plan; keeps open-file rook battery option.) | Bb5+ (Active check forces Black king to commit, gains tempo; open-file rooks heuristic sup…
- chess.js.legal_moves0ms
- llm.candidates100454ms · $0.0794
full reasoning
Candidates: Rb1 (Removes Ra1 from Nd4-c2+ fork target — highest-priority defuse per plan; keeps open-file rook battery option.) | Bb5+ (Active check forces Black king to commit, gains tempo; open-file rooks heuristic supported by vacating f1 for O-O.) | Kd2 (King escapes fork target on e1, defusing Nd4-c2+; frees Ra1-d1 path to activate the d-file rook battery plan.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bb5+ — Forces Black to respond immediately (check gains free tempo), vacates f1 so White can O-O next move — permanently defusing Nd4-c2+ because king leaves e1. Every Black reply (Ke7, Bd7, Nc6, Qd7) is answ…
- llm.reflect77377ms · $0.0584
full reasoning
Final pick: Bb5+ — Forces Black to respond immediately (check gains free tempo), vacates f1 so White can O-O next move — permanently defusing Nd4-c2+ because king leaves e1. Every Black reply (Ke7, Bd7, Nc6, Qd7) is answered by O-O, after which Nc2+ is no longer check.. Rejected: a1b1, e1d2.
9. Commit Commit Bb5+ (f1b5).
22...axb5Sonnet
1. Observe Halbzug 22, Schwarz am Zug. Phase: Mittelspiel. Schwarz +3 Punkte. Legale Zuege: 7. Schach! Criticality: 0.25.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng440ms · fail
5. Plan Phase: middlegame. Halbzug 22, Schwarz am Zug. Phase: Mittelspiel. Schwarz +3 Punkte. Legale Zuege: 7. Schach! Criticality: 0.25. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative…
full reasoning
Phase: middlegame. Halbzug 22, Schwarz am Zug. Phase: Mittelspiel. Schwarz +3 Punkte. Legale Zuege: 7. Schach! Criticality: 0.25. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: axb5 (Captures checking bishop for a pawn, wins material, Nb6 loses d7 threat with Bb5 gone.) | Nxb5 (Knight captures checking bishop; Nc3xb5 recaptures but Black retains large material lead.) | Nc6 (Blocks c…
- chess.js.legal_moves0ms
- llm.candidates110944ms · $0.0742
full reasoning
Candidates: axb5 (Captures checking bishop for a pawn, wins material, Nb6 loses d7 threat with Bb5 gone.) | Nxb5 (Knight captures checking bishop; Nc3xb5 recaptures but Black retains large material lead.) | Nc6 (Blocks check with centralized knight; keeps Nd4 power and avoids Nb6xd7 line after Bd7.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: axb5 — Captures checking bishop for a pawn, wins material, Nb6 loses d7 threat with Bb5 gone.. Rejected: d4b5, d4c6. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit axb5 (a6b5).
23.O-OSonnet
1. Observe Halbzug 23, Weiss am Zug. Phase: Mittelspiel. Schwarz +6 Punkte. Legale Zuege: 34. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search12ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Execute Ra1→d1 to defuse the Nd4-c2+ fork (removes Ra1 target), then Bf1 evacuates to open castling path, then O-O — completing the rook-battery plan on the d-file against the stranded Black king withi…
- llm.plan28022ms · $0.0185
full reasoning
Phase: middlegame. Execute Ra1→d1 to defuse the Nd4-c2+ fork (removes Ra1 target), then Bf1 evacuates to open castling path, then O-O — completing the rook-battery plan on the d-file against the stranded Black king within 2 more moves. Accept the material deficit as tempo-cost and convert Black's uncastled Ke8 — hemmed in by Ng8, Rh8, and Bc8 — into a mating net via the open d-file rook battery (Rd1 + Rfd1), while Nb6 keeps queenside pressure and ties down Black's pieces. Critical: Nd4-c2+ fork on Ke1+Ra1 remains highest-priority threat if Ra1 is not evacuated this move; Black Ng8 blocks own king-side escape — Ke8 cannot castle short, rook battery will be decisive; After Ra1 leaves a1, White must not allow any piece to re-block the d-file before battery is complete.
6. Candidates Candidates: Rb1 (Evacuates Ra1 per plan's highest-priority directive, removing fork target from Nd4-c2+ attack on Ke1+Ra1.) | Bd2 (Clears c1, opens rook battery path toward d-file; exploits Black Ke8 trapped by Ng8 block…
- chess.js.legal_moves0ms
- llm.candidates58746ms · $0.0455
full reasoning
Candidates: Rb1 (Evacuates Ra1 per plan's highest-priority directive, removing fork target from Nd4-c2+ attack on Ke1+Ra1.) | Bd2 (Clears c1, opens rook battery path toward d-file; exploits Black Ke8 trapped by Ng8 blocking kingside escape.) | O-O (Completes rook-battery plan immediately; Ke8 cannot answer in kind — Ng8 blocks short castle per plan.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: O-O — Castling removes Ke1 from c2-fork target: Nc2 is no longer check with king on g1. Connects Ra1+Rf1 immediately for d-file battery. If Nc2 follows, Bxc2 recovers the knight at no cost. Black Ng8 prevents…
- llm.reflect92480ms · $0.0745
full reasoning
Final pick: O-O — Castling removes Ke1 from c2-fork target: Nc2 is no longer check with king on g1. Connects Ra1+Rf1 immediately for d-file battery. If Nc2 follows, Bxc2 recovers the knight at no cost. Black Ng8 prevents mirror castling.. Rejected: a1b1, c1d2.
9. Commit Commit O-O (e1g1).
24...Qxb6Sonnet
1. Observe Halbzug 24, Schwarz am Zug. Phase: Mittelspiel. Schwarz +6 Punkte. Legale Zuege: 38. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng555ms · fail
5. Plan Phase: middlegame. Neutralize the annoying b6 outpost knight via a queen attack (driving it away without weakening structure), secure the king, then unleash the dominant d4 knight's forking and checking threats against W…
- llm.plan113787ms · $0.0585
full reasoning
Phase: middlegame. Neutralize the annoying b6 outpost knight via a queen attack (driving it away without weakening structure), secure the king, then unleash the dominant d4 knight's forking and checking threats against White's king and rooks. Convert the +6 material advantage by stabilizing the king, preserving the dominant centralized knight as long as it generates active threats, and simplifying into a technically won endgame once White's active pieces are expelled. Critical: White's b6 outpost knight attacks the c8 bishop and disrupts queenside coordination — must be driven back before proceeding; Black's d4 knight controls c2, f3, b3, e2 simultaneously and creates latent fork threats that grow stronger once the king is safe; Black king on e8 with no castling rights is the primary vulnerability — according to research, securing the king (queenside or kingside shelter) takes priority before launching the d4 knight's tactical strikes.
6. Candidates Candidates: Qxb6 (Directly captures the annoying b6 outpost knight, eliminating threat to c8 bishop and extending material lead.) | Nf3+ (Check with dominant d4 knight forces king to move, exploiting simultaneous fork th…
- chess.js.legal_moves0ms
- llm.candidates21771ms · $0.0166
full reasoning
Candidates: Qxb6 (Directly captures the annoying b6 outpost knight, eliminating threat to c8 bishop and extending material lead.) | Nf3+ (Check with dominant d4 knight forces king to move, exploiting simultaneous fork threats as plan prescribes.) | Nxc2 (D4 knight forks Ra1 and Bc1, winning further material and converting the +6 advantage decisively.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qxb6 — Directly captures the annoying b6 outpost knight, eliminating threat to c8 bishop and extending material lead.. Rejected: d4f3, d4c2. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Qxb6 (d8b6).
25.Be3Sonnet
1. Observe Halbzug 25, Weiss am Zug. Phase: Mittelspiel. Schwarz +9 Punkte. Legale Zuege: 25. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Defuse Nd4's double threat — Ne2+ (forks Kg1 + Bc1) is highest priority, Nc2 (wins pawn, targets Ra1) is secondary. Evacuate Ra1 to d1 to remove the queenside fork target and seize the semi-open d-file…
- llm.plan105894ms · $0.0788
full reasoning
Phase: middlegame. Defuse Nd4's double threat — Ne2+ (forks Kg1 + Bc1) is highest priority, Nc2 (wins pawn, targets Ra1) is secondary. Evacuate Ra1 to d1 to remove the queenside fork target and seize the semi-open d-file, then activate Bc1 to contest Nd4's dominance. Goal: rook battery on d-file threatening Black's uncastled Ke8 within two moves. Convert Black's self-imprisoned king (blocked by Ng8, Rh8, Bc8) into a mating target via a d-file rook battery, trading the material deficit for a decisive positional attack before Black untangles. Critical: Ne2+ is immediate: knight checks Kg1 and wins Bc1 next move — must resolve before d-file plan; Nc2 wins c2 pawn and attacks Ra1 if Ra1 stays on a1; Black Qb6 eyes f2 if White's coordination lapses; Black Ke8 cannot castle due to Ng8+Rh8 blocking — exploit this window now.
6. Candidates Candidates: Be3 (Directly attacks Nd4, forcing it to vacate e2-fork square; activates Bc1 as the plan demands to contest Nd4's dominance.) | Rd1 (Seizes semi-open d-file pointing at uncastled Ke8; begins rook battery pla…
- chess.js.legal_moves0ms
- llm.candidates102421ms · $0.0830
full reasoning
Candidates: Be3 (Directly attacks Nd4, forcing it to vacate e2-fork square; activates Bc1 as the plan demands to contest Nd4's dominance.) | Rd1 (Seizes semi-open d-file pointing at uncastled Ke8; begins rook battery plan and removes Rf1 from back-rank vulnerability.) | Nd5 (Heuristic top candidate; attacks Qb6 creating dual threat while placing knight on dominant central outpost with multiple follow-up threats.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Be3 — Vacates c1 entirely, defusing the Ne2+ fork (knight would check Kg1 but find c1 empty). Simultaneously attacks Nd4 directly — the only move resolving both threats in one tempo.. Rejected: f1d1, c3d5.
- llm.reflect81785ms · $0.0617
9. Commit Commit Be3 (c1e3).
26...Nxc2Sonnet
1. Observe Halbzug 26, Schwarz am Zug. Phase: Mittelspiel. Schwarz +9 Punkte. Legale Zuege: 40. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search (middlegame, SearXNG + summary): This middlegame position resembles a hybrid between a Sicilian-type structure and a piece-activity contest, with Black having a well-posted knight on d4 and a potentially stron…
- web_search.searxng798ms
- llm.research_summary13536ms · $0.0044
full reasoning
Web search (middlegame, SearXNG + summary): This middlegame position resembles a hybrid between a Sicilian-type structure and a piece-activity contest, with Black having a well-posted knight on d4 and a potentially strong bishop pair. Black has dynamic counterplay centered around the…
5. Plan Phase: middlegame. Castle kingside immediately to remove the king-safety liability, then activate the c8 bishop via ...Be6 or ...Bg4 to pile pressure on e4, while exploiting the d4 knight's fork threats (Nf3+ checks Kg1;…
- llm.plan57291ms · $0.0413
full reasoning
Phase: middlegame. Castle kingside immediately to remove the king-safety liability, then activate the c8 bishop via ...Be6 or ...Bg4 to pile pressure on e4, while exploiting the d4 knight's fork threats (Nf3+ checks Kg1; Ne2 forks both rooks) before White can untangle with Nd5 or f4. Convert the large material surplus by eliminating the only Black weakness (uncastled king), preserving the dominant d4 outpost as a tactical weapon, and simplifying into a technically won endgame once White's bishop and rooks are driven passive or exchanged. Critical: Nf3+ checking Kg1 and Ne2 forking Ra1+Rf1 are both live — calculate before castling to avoid missing a decisive tactic; White's f4 break would challenge e5 and stabilize the position — must be anticipated; b5-b4 advance can dislodge Nc3 and open lines for Black's rooks once king is safe; White's Rf1 is primed to activate via f-file — castling urgency is high.
6. Candidates Candidates: Nxc2 (Captures c2 pawn while forking Ra1 and Be3 simultaneously; White cannot save both, converting material surplus cleanly.) | Ne2+ (Checks king immediately; after Kh1, Nxc3 wins White's c3 knight; Bxe2 mer…
- chess.js.legal_moves0ms
- llm.candidates115527ms · $0.1040
full reasoning
Candidates: Nxc2 (Captures c2 pawn while forking Ra1 and Be3 simultaneously; White cannot save both, converting material surplus cleanly.) | Ne2+ (Checks king immediately; after Kh1, Nxc3 wins White's c3 knight; Bxe2 merely trades bishop for Black's dominant outpost knight.) | Nf3+ (Forces king to h1, enabling Nxh2 pawn grab or Ne1 follow-up; disrupts White rook coordination while preserving initiative.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxc2 — Captures c2 pawn while forking Ra1 and Be3 simultaneously; White cannot save both, converting material surplus cleanly.. Rejected: d4e2, d4f3. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Nxc2 (d4c2).
27.Bxb6Sonnet
1. Observe Halbzug 27, Weiss am Zug. Phase: Mittelspiel. Schwarz +10 Punkte. Legale Zuege: 33. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search17ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Halbzug 27, Weiss am Zug. Phase: Mittelspiel. Schwarz +10 Punkte. Legale Zuege: 33. Criticality: 0.00. Memory: 5 position hit(s) + 0 opponent hit(s). Plan: activate pieces, attack weak pawns, keep the …
full reasoning
Phase: middlegame. Halbzug 27, Weiss am Zug. Phase: Mittelspiel. Schwarz +10 Punkte. Legale Zuege: 33. Criticality: 0.00. Memory: 5 position hit(s) + 0 opponent hit(s). Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Bxb6 (Captures the queen directly; after bxb6 White wins a full queen for bishop, massive material gain despite Nc2) | Nd5 (Knight forks queen on b6 and eyes e7/c7; strong central outpost creates multiple thr…
- chess.js.legal_moves0ms
- llm.candidates63263ms · $0.0500
full reasoning
Candidates: Bxb6 (Captures the queen directly; after bxb6 White wins a full queen for bishop, massive material gain despite Nc2) | Nd5 (Knight forks queen on b6 and eyes e7/c7; strong central outpost creates multiple threats forcing immediate response) | Nxb5 (Gains b5 pawn and attacks queen on b6; keeps initiative and active piece play per generation directive)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxb6 — Bishop on e3 travels d4-c5-b6, capturing the queen immediately. After bxb6 Rfc1 Nxa1 Rxa1, White nets queen+knight vs bishop+rook (+4 material). If Nd4 instead, White is up a full queen for bishop.. Re…
- llm.reflect104401ms · $0.0812
full reasoning
Final pick: Bxb6 — Bishop on e3 travels d4-c5-b6, capturing the queen immediately. After bxb6 Rfc1 Nxa1 Rxa1, White nets queen+knight vs bishop+rook (+4 material). If Nd4 instead, White is up a full queen for bishop.. Rejected: c3d5, c3b5.
9. Commit Commit Bxb6 (e3b6).
28...Nxa1Sonnet
1. Observe Halbzug 28, Schwarz am Zug. Phase: Mittelspiel. Schwarz +1 Punkte. Legale Zuege: 31. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng113ms · fail
5. Plan Phase: middlegame. Halbzug 28, Schwarz am Zug. Phase: Mittelspiel. Schwarz +1 Punkte. Legale Zuege: 31. Criticality: 0.15. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-…
full reasoning
Phase: middlegame. Halbzug 28, Schwarz am Zug. Phase: Mittelspiel. Schwarz +1 Punkte. Legale Zuege: 31. Criticality: 0.15. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Nxa1 (captures r score=3) | Nd4 (centre score=1) | Bd7 (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: Nxa1 — Wins a full rook for a knight (+2 material). After Rxa1 recapture Black is up the exchange. If White tries Nd5 instead, Black plays Rd8 neutralizing the Nc7+ fork threat while retaining the material ad…
- llm.reflect97444ms · $0.0746
full reasoning
Final pick: Nxa1 — Wins a full rook for a knight (+2 material). After Rxa1 recapture Black is up the exchange. If White tries Nd5 instead, Black plays Rd8 neutralizing the Nc7+ fork threat while retaining the material advantage.. Rejected: c2d4, c8d7.
9. Commit Commit Nxa1 (c2a1).
29.Nxb5Sonnet
1. Observe Halbzug 29, Weiss am Zug. Phase: Mittelspiel. Schwarz +6 Punkte. Legale Zuege: 29. 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-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Drive knight to b5 to threaten Nc7+ fork (Ke8, Rh8) while Bb6 covers d8 retreat — force Black to react before consolidating; Rf1 should seek the f-file or swing to d1 to pressure Bd6 (open-file rooks h…
- llm.plan61947ms · $0.0493
full reasoning
Phase: middlegame. Drive knight to b5 to threaten Nc7+ fork (Ke8, Rh8) while Bb6 covers d8 retreat — force Black to react before consolidating; Rf1 should seek the f-file or swing to d1 to pressure Bd6 (open-file rooks heuristic: rook belongs on open or semi-open file, not passive on f1). Offset the material deficit entirely through tactical piece activity: Bb6 + Nc3→b5 create a concrete fork threat against the uncastled Black king; Black's b5/e5 pawns are potential isolated-pawn targets (IQP heuristic: pawns without neighbor support become endgame liabilities) once the king threat is resolved. Critical: Nc7+ after Nb5 is a real forcing threat — Ke8 and Rh8 both hanging; Black Na1 is completely idle (b3 or c2 only) — White effectively plays vs 14 pieces; Black cannot castle kingside immediately (Ng8 occupies g8); material deficit makes passive play losing — aggression is mandatory this turn.
6. Candidates Candidates: Nxb5 (Wins b5 pawn and threatens Nc7+ fork on Ke8/Rh8 — forces Black to react immediately, multiple threats heuristic.) | Rxa1 (Captures idle Na1 for free; open-file rook heuristic: rook becomes active on a-f…
- chess.js.legal_moves0ms
- llm.candidates21279ms · $0.0145
full reasoning
Candidates: Nxb5 (Wins b5 pawn and threatens Nc7+ fork on Ke8/Rh8 — forces Black to react immediately, multiple threats heuristic.) | Rxa1 (Captures idle Na1 for free; open-file rook heuristic: rook becomes active on a-file vs passive on f1.) | Rd1 (Swings rook to d-file pressuring Bd6; semi-open file heuristic — rook belongs on active file, not passive f1.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxb5 — Wins b5 pawn and threatens Nc7+ fork on Ke8/Rh8 — forces Black to react immediately, multiple threats heuristic.. Rejected: f1a1, f1d1. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Nxb5 (c3b5).
30...Nc2Sonnet
1. Observe Halbzug 30, Schwarz am Zug. Phase: Mittelspiel. Schwarz +5 Punkte. Legale Zuege: 26. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng401ms · fail
5. Plan Phase: middlegame. Halbzug 30, Schwarz am Zug. Phase: Mittelspiel. Schwarz +5 Punkte. Legale Zuege: 26. Criticality: 0.10. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-…
full reasoning
Phase: middlegame. Halbzug 30, Schwarz am Zug. Phase: Mittelspiel. Schwarz +5 Punkte. Legale Zuege: 26. Criticality: 0.10. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Nc2 (Deeply-posted knight stays active inside White's camp, threatens e3/f4, maximum initiative.) | Bc5 (Activates bishop targeting f2 directly; combined with Nc2 creates dual pressure per outpost theory.) | …
- chess.js.legal_moves0ms
- llm.candidates115870ms · $0.0143
full reasoning
Candidates: Nc2 (Deeply-posted knight stays active inside White's camp, threatens e3/f4, maximum initiative.) | Bc5 (Activates bishop targeting f2 directly; combined with Nc2 creates dual pressure per outpost theory.) | Nf6 (Develops the rim knight, attacks e4 pawn — solid activation, 'knight on rim is dim' corrected.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nc2 — Deeply-posted knight stays active inside White's camp, threatens e3/f4, maximum initiative.. Rejected: d6c5, g8f6. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Nc2 (a1c2).
31.Nc7+Sonnet
1. Observe Halbzug 31, Weiss am Zug. Phase: Mittelspiel. Schwarz +5 Punkte. Legale Zuege: 29. 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-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Execute the Nc7+ fork immediately — before Black's Nc2 reaches e3 next move — winning the exchange (knight for rook), then activate Rf1 on the f-file or central file to press Black's exposed king and t…
- llm.plan103486ms · $0.0776
full reasoning
Phase: middlegame. Execute the Nc7+ fork immediately — before Black's Nc2 reaches e3 next move — winning the exchange (knight for rook), then activate Rf1 on the f-file or central file to press Black's exposed king and target the e5 pawn Convert the fork to reduce the material deficit from −5 to roughly −3, then leverage the open-file rooks heuristic (Rf1 belongs on an active file) against Black's isolated e5 pawn and uncastled king to maintain enough compensation to fight for equality Critical: Nc7+ fork is available NOW and wins the exchange outright before Black consolidates — urgency: Nc2→e3 next move forks Rf1 and g2, so order of operations is decisive; Nc2 is the sharpest enemy piece: Ne3 threat looms, Nd4 also attacks Nb5 — must exploit fork this turn or concede tempo; Bb6 anchors the whole plan by covering d8 and supporting Nc7; after the exchange win Rf1 should seek the f-file (semi-open after f7 pressure) or e-file to target e5 as an isolated-pawn liability per IQP heuristic.
6. Candidates Candidates: Nc7+ (Fork king and rook on a8; wins the exchange immediately before Black's Nc2-e3 threat materializes.) | Nxd6+ (Captures the bishop with check, winning material and disrupting Black's coordination while ma…
- chess.js.legal_moves0ms
- llm.candidates11742ms · $0.0036
full reasoning
Candidates: Nc7+ (Fork king and rook on a8; wins the exchange immediately before Black's Nc2-e3 threat materializes.) | Nxd6+ (Captures the bishop with check, winning material and disrupting Black's coordination while maintaining piece activity.) | Bd4 (Activates bishop on strong central diagonal, targets e5 pawn as IQP liability and supports open-file rook pressure.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nc7+ — Fork king and rook on a8; wins the exchange immediately before Black's Nc2-e3 threat materializes.. Rejected: b5d6, b6d4. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Nc7+ (b5c7).
32...Bxc7Sonnet
1. Observe Halbzug 32, Schwarz am Zug. Phase: Mittelspiel. Schwarz +5 Punkte. Legale Zuege: 5. Schach! Criticality: 0.55.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng566ms · fail
5. Plan Phase: middlegame. Capture the checking Nc7 with Bd6, removing the immediate threat, eliminating White's most dangerous active piece, and simplifying toward a won endgame. Even after Bb6xc7 recapture, Black retains overw…
- llm.plan101380ms · $0.0684
full reasoning
Phase: middlegame. Capture the checking Nc7 with Bd6, removing the immediate threat, eliminating White's most dangerous active piece, and simplifying toward a won endgame. Even after Bb6xc7 recapture, Black retains overwhelming material edge. Nc2 then becomes a powerful anchor threatening forks on a1/b4/e1. Convert Black's +5 material surplus by eliminating aggressive White pieces via forced exchanges, then activate Rh8 to an open file and coordinate Nc2 against White's exposed queenside pawns (a2, b2) and the back-rank rook. Critical: Nc7 is delivering check — response is mandatory, no free moves; Bxc7 is the only checking-piece capture among the 5 legal moves (4 are king retreats); per 'simplify when ahead' principle it dominates; After Bxc7 Bxc7, White's remaining pieces (Rf1, lone pawns) cannot compensate for material deficit; Nc2 sits deep in White's position threatening a1, b4, e1 fork patterns — must not be traded away carelessly.
6. Candidates Candidates: Bxc7 (Captures checking piece, eliminates White's most aggressive attacker, simplifies while maintaining +5 material advantage.) | Kf8 (King retreats to safety on f8, keeping Nc2 active and preserving materia…
- chess.js.legal_moves0ms
- llm.candidates10883ms · $0.0035
full reasoning
Candidates: Bxc7 (Captures checking piece, eliminates White's most aggressive attacker, simplifies while maintaining +5 material advantage.) | Kf8 (King retreats to safety on f8, keeping Nc2 active and preserving material advantage without trading pieces.) | Kd7 (King moves toward center, potentially activating for endgame while escaping check; keeps coordination with Nc2.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxc7 — Eliminates the checking piece (Nc7), White's most dangerous active attacker. After Bxc7 Bxc7, Black retains B+N+N+R vs B+R — a full two-piece surplus — and Nc2 sits deep threatening a1/e1 fork patterns…
- llm.reflect64826ms · $0.0525
full reasoning
Final pick: Bxc7 — Eliminates the checking piece (Nc7), White's most dangerous active attacker. After Bxc7 Bxc7, Black retains B+N+N+R vs B+R — a full two-piece surplus — and Nc2 sits deep threatening a1/e1 fork patterns with no counterplay for White.. Rejected: e8f8, e8d7.
9. Commit Commit Bxc7 (d6c7).
33.Re1Sonnet
1. Observe Halbzug 33, Weiss am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 22. 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-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Per open-file-rooks heuristic, activate Rf1 immediately via Rf8+ — the only forcing move that plants the rook on a file pressing Black's exposed king. Then trade on g8 to strip a Black piece, while Bxc…
- llm.plan95394ms · $0.0731
full reasoning
Phase: middlegame. Per open-file-rooks heuristic, activate Rf1 immediately via Rf8+ — the only forcing move that plants the rook on a file pressing Black's exposed king. Then trade on g8 to strip a Black piece, while Bxc7 recovers material. Priority: move before Nc2-e1 wins the exchange for free. Down -8 with no realistic equalization; the bishop-rook duo targeting the e8-corridor and open f-file (open-file-rooks heuristic: rook belongs on f8 pressing an uncastled king, not passively on f1) is the only fighting plan — generate maximum complications around Black's temporarily uncoordinated king-side before Black consolidates with Ne1. Critical: Nc2-e1 wins Rf1 outright on the next Black move — urgency is absolute; Black's Ng8 blocks the h8-rook, creating a temporary back-rank coordination problem exploitable via Rf8+; White's e4 pawn is a static isolated pawn contributing nothing — consistent with IQP heuristic that an IQP without active piece compensation is pure liability, reinforcing that piece activity via Rf8+ is the only viable plan.
6. Candidates Candidates: Re1 (Prevents the immediate Nc2-Ne1 fork that wins the rook outright; open-file-rooks heuristic: rook activates on the semi-open e-file.) | Bxc7 (Wins the c7 bishop immediately for material; Gen-0 directive: …
- chess.js.legal_moves0ms
- llm.candidates58809ms · $0.0503
full reasoning
Candidates: Re1 (Prevents the immediate Nc2-Ne1 fork that wins the rook outright; open-file-rooks heuristic: rook activates on the semi-open e-file.) | Bxc7 (Wins the c7 bishop immediately for material; Gen-0 directive: create threats and multiple problems rather than passive waiting.) | f4 (IQP heuristic demands active piece compensation; f4 creates complications on the f-file and opens lines before Black consolidates.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Re1 — Prevents the immediate Nc2-Ne1 fork that wins the rook outright; open-file-rooks heuristic: rook activates on the semi-open e-file.. Rejected: b6c7, f2f4. [LLM note: Claude CLI subprocess timed out afte…
full reasoning
Final pick: Re1 — Prevents the immediate Nc2-Ne1 fork that wins the rook outright; open-file-rooks heuristic: rook activates on the semi-open e-file.. Rejected: b6c7, f2f4. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Re1 (f1e1).
34...Bxb6Sonnet
1. Observe Halbzug 34, Schwarz am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 28. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng761ms · fail
5. Plan Phase: middlegame. Halbzug 34, Schwarz am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 28. Criticality: 0.10. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-…
full reasoning
Phase: middlegame. Halbzug 34, Schwarz am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 28. Criticality: 0.10. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Bxb6 (Wins unprotected White bishop for free; per research principle 'reduce counterplay first' before converting material advantage.) | Nxe1 (Knight captures undefended rook on e1, winning an exchange (+2 pt…
- chess.js.legal_moves0ms
- llm.candidates97795ms · $0.0491
full reasoning
Candidates: Bxb6 (Wins unprotected White bishop for free; per research principle 'reduce counterplay first' before converting material advantage.) | Nxe1 (Knight captures undefended rook on e1, winning an exchange (+2 pts) while Black is already up +8.) | Nd4 (Centralizes knight on dominant d4 square, eyes f5/e6/c6, maintains initiative without trading the active piece.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxb6 — Wins unprotected White bishop for free; per research principle 'reduce counterplay first' before converting material advantage.. Rejected: c2e1, c2d4. [LLM note: Claude CLI subprocess timed out after 1…
full reasoning
Final pick: Bxb6 — Wins unprotected White bishop for free; per research principle 'reduce counterplay first' before converting material advantage.. Rejected: c2e1, c2d4. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Bxb6 (c7b6).
35.Re2Sonnet
1. Observe Halbzug 35, Weiss am Zug. Phase: Mittelspiel. Schwarz +11 Punkte. Legale Zuege: 17. Criticality: 0.10. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Escape Nc2xe1 immediately — the knight on c2 attacks e1 directly and wins the rook for free if White passes. Re2 is the safest square (knight geometry from c2 cannot reach e2). After relocating, rerout…
- llm.plan82959ms · $0.0607
full reasoning
Phase: middlegame. Escape Nc2xe1 immediately — the knight on c2 attacks e1 directly and wins the rook for free if White passes. Re2 is the safest square (knight geometry from c2 cannot reach e2). After relocating, reroute the rook to the f-file (semi-open, no white pawn blocking) targeting Black's uncastled king on e8. Down -11 material with resignation recommended by engine; the only fighting plan is to exploit open-file-rooks heuristic (f-file semi-open, e-file blocked by own e4 pawn) and drive the rook toward f8 before Black consolidates Nc2 and the bishop pair — complications around the exposed e8 king are White's sole survival mechanism. Critical: Nc2xe1 is an immediate one-move threat — must be addressed before all else; e-file is self-blocked by White's e4 pawn; per open-file-rooks heuristic the f-file is superior and semi-open; Black king on e8 uncastled and temporarily exposed — the only offensive target; Black's bishop pair on b6+c8 and two knights will dominate quickly once material advantage consolidates.
6. Candidates Candidates: Re2 (Escapes Nc2xe1 fork immediately; Re2 unreachable by knight on c2, preserving rook for f-file counterplay.) | Rf1 (Sidesteps Nc2xe1 threat while landing on semi-open f-file, activating rook toward Black's…
- chess.js.legal_moves0ms
- llm.candidates9450ms · $0.0039
full reasoning
Candidates: Re2 (Escapes Nc2xe1 fork immediately; Re2 unreachable by knight on c2, preserving rook for f-file counterplay.) | Rf1 (Sidesteps Nc2xe1 threat while landing on semi-open f-file, activating rook toward Black's uncastled king on e8.) | Kh1 (Vacates g1 escape square and avoids immediate material loss, though does not address Nc2xe1 as directly as Re2.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Re2 — Knight on c2 reaches {a1,a3,b4,d4,e1,e3} — e2 is NOT in that set, so the rook survives. Re2 stays central and can swing to d2/c2 or eventually f2 to pressure Black's uncastled king on e8.. Rejected: e1f…
- llm.reflect47315ms · $0.0396
full reasoning
Final pick: Re2 — Knight on c2 reaches {a1,a3,b4,d4,e1,e3} — e2 is NOT in that set, so the rook survives. Re2 stays central and can swing to d2/c2 or eventually f2 to pressure Black's uncastled king on e8.. Rejected: e1f1, g1h1.9. Commit Commit Re2 (e1e2).
36...Nd4Sonnet
1. Observe Halbzug 36, Schwarz am Zug. Phase: Mittelspiel. Schwarz +11 Punkte. Legale Zuege: 32. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng357ms · fail
5. Plan Phase: middlegame. Drive Nc2→d4 to attack White's only active piece Re2, forcing its retreat or capture; follow with Bb6-pressure on f2 diagonal and Ng8 activation to overwhelm a kingside already stripped of defenders Ne…
- llm.plan106783ms · $0.0770
full reasoning
Phase: middlegame. Drive Nc2→d4 to attack White's only active piece Re2, forcing its retreat or capture; follow with Bb6-pressure on f2 diagonal and Ng8 activation to overwhelm a kingside already stripped of defenders Neutralize Re2 via the d4 outpost, then coordinate the bishop pair and both knights to mop up White's pawns and deliver checkmate against the lone Kg1 Critical: Nc2-d4 immediately attacks Re2 — White must react to losing the rook; Bb6 latently targets f2 (Bxf2+ check once Re2 leaves the 2nd rank); Ng8 and Rh8 are dormant — activating both in next 3 moves decides the game.
6. Candidates Candidates: Nd4 (Knight forks to d4, directly attacking Re2; White must react or lose the rook immediately.) | Bxf2+ (Immediate check captures f2 pawn; forces Kg1 to move, winning material with no compensation.) | Bd4 (B…
- chess.js.legal_moves0ms
- llm.candidates30243ms · $0.0230
full reasoning
Candidates: Nd4 (Knight forks to d4, directly attacking Re2; White must react or lose the rook immediately.) | Bxf2+ (Immediate check captures f2 pawn; forces Kg1 to move, winning material with no compensation.) | Bd4 (Bishop occupies central outpost, threatens Bxf2+ and pressures e3; second attacker on key diagonal.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nd4 — Knight forks to d4, directly attacking Re2; White must react or lose the rook immediately.. Rejected: b6f2, b6d4. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Nd4 (c2d4).
37.Re3Sonnet
1. Observe Halbzug 37, Weiss am Zug. Phase: Mittelspiel. Schwarz +11 Punkte. Legale Zuege: 16. Criticality: 0.10. 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-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Escape the rook off e2 immediately — Nd4xe2 wins it for free. After relocating (f2 or e1 dodge the knight geometry from d4), probe the f-file toward Black's uncastled king on e8. Nd4-f3+ is the seconda…
- llm.plan48880ms · $0.0352
full reasoning
Phase: middlegame. Escape the rook off e2 immediately — Nd4xe2 wins it for free. After relocating (f2 or e1 dodge the knight geometry from d4), probe the f-file toward Black's uncastled king on e8. Nd4-f3+ is the secondary threat once rook moves, so destination square must not allow that fork to stay decisive. Down -11 material with engine recommending resignation; only practical survival plan is to create imbalance via rook activity on the f-file (semi-open: no White pawn on f-) targeting f8/f7, forcing Black to spend tempi defending before consolidating the knight-bishop pair advantage — exploiting open-file-rooks heuristic directly. Critical: Nd4xe2 is an immediate free-rook capture — any non-rook-moving response loses the game on the spot; After rook moves, Nd4-f3+ check is possible (knight on d4 reaches f3, which attacks g1 king) — rook destination must not enable a follow-up fork; Black's king stuck on e8 with f7 pawn is the only active counterplay target; f-file semi-open heuristic applies; Bishop pair on b6+c8 not yet active — White has brief window before Black centralises and converts cleanly.
6. Candidates Candidates: Re3 (Escapes Nxe2 capture while avoiding Nf3+ fork geometry — f3 knight does not attack e3 square.) | Re1 (Escapes free Nxe2 capture; rook drops to back rank exploiting open-file heuristic, though Nf3+ fork r…
- chess.js.legal_moves0ms
- llm.candidates115494ms · $0.0969
full reasoning
Candidates: Re3 (Escapes Nxe2 capture while avoiding Nf3+ fork geometry — f3 knight does not attack e3 square.) | Re1 (Escapes free Nxe2 capture; rook drops to back rank exploiting open-file heuristic, though Nf3+ fork risk increases.) | Rd2 (Sidesteps immediate Nxe2; keeps rook centralized on 2nd rank, though Nf3+ forking motif lingers as follow-up threat.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Re3 — Sidesteps free Nxe2 while uniquely immune to the Nf3+ fork: knight on f3 attacks {g1,e1,d2,h2} but NOT e3, so the rook survives. Opens f-file pressure toward Black's uncastled king.. Rejected: e2e1, e2d…
- llm.reflect36289ms · $0.0289
full reasoning
Final pick: Re3 — Sidesteps free Nxe2 while uniquely immune to the Nf3+ fork: knight on f3 attacks {g1,e1,d2,h2} but NOT e3, so the rook survives. Opens f-file pressure toward Black's uncastled king.. Rejected: e2e1, e2d2.9. Commit Commit Re3 (e2e3).
38...Nf3+Sonnet
1. Observe Halbzug 38, Schwarz am Zug. Phase: Mittelspiel. Schwarz +11 Punkte. Legale Zuege: 31. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng541ms · fail
5. Plan Phase: middlegame. Nd4-f3+ forces Kg1 off g1, vacating d4 on the Bb6 diagonal — Bb6xe3 wins the lone rook immediately. With rook gone White has king and pawns only; activate Ng8, Rh8, Bc8 to deliver forced mate. Eliminat…
- llm.plan107826ms · $0.0762
full reasoning
Phase: middlegame. Nd4-f3+ forces Kg1 off g1, vacating d4 on the Bb6 diagonal — Bb6xe3 wins the lone rook immediately. With rook gone White has king and pawns only; activate Ng8, Rh8, Bc8 to deliver forced mate. Eliminate White's sole active piece (Re3) via the forced Nf3+/Bxe3 tactical sequence, then coordinate the full Black army (bishop pair, two knights, rook) to corral and checkmate the isolated Kg1 stripped of all defenders. Critical: Nf3+ is a forcing check — king must vacate g1, leaving d4 empty and unblocking Bb6xe3; Bb6-e3 diagonal (b6-c5-d4-e3) requires d4 square clear — only Nf3+ achieves this in one move; After Bxe3, Ng8 and Rh8 are still dormant — next priority is Ne7/Nf6 and Rhe8 to build mating net; White has no counter-threats: pawns on a2/b2/f2/g2/h2 are all inert, king is exposed.
6. Candidates Candidates: Nf3+ (Forcing check clears d4, unblocking Bb6-e3 diagonal; Bxe3 wins Re3 immediately next move.) | Ne2+ (Check forces king off g1; Ne2 directly attacks Re3, winning rook regardless of king escape square.) | N…
- chess.js.legal_moves0ms
- llm.candidates57813ms · $0.0454
full reasoning
Candidates: Nf3+ (Forcing check clears d4, unblocking Bb6-e3 diagonal; Bxe3 wins Re3 immediately next move.) | Ne2+ (Check forces king off g1; Ne2 directly attacks Re3, winning rook regardless of king escape square.) | Nf5 (Knight leaps to f5 attacking Re3 and e7, maintaining heavy pressure without requiring a precise sequence.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf3+ — Nf3+ checks Kg1 and vacates d4, fully unblocking the Bb6-e3 diagonal. After either Kh1 or Kf1, Bxe3 wins the rook for free — king is two squares from f3 in both cases, so no recapture is possible.. Rej…
- llm.reflect89515ms · $0.0805
full reasoning
Final pick: Nf3+ — Nf3+ checks Kg1 and vacates d4, fully unblocking the Bb6-e3 diagonal. After either Kh1 or Kf1, Bxe3 wins the rook for free — king is two squares from f3 in both cases, so no recapture is possible.. Rejected: d4e2, d4f5.
9. Commit Commit Nf3+ (d4f3).
39.Rxf3Sonnet
1. Observe Halbzug 39, Weiss am Zug. Phase: Mittelspiel. Schwarz +11 Punkte. Legale Zuege: 4. 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-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Halbzug 39, Weiss am Zug. Phase: Mittelspiel. Schwarz +11 Punkte. Legale Zuege: 4. Schach! Criticality: 0.55. AUFGABE empfohlen (Material-Floor). Memory: 5 position hit(s) + 0 opponent hit(s). Plan: ac…
full reasoning
Phase: middlegame. Halbzug 39, Weiss am Zug. Phase: Mittelspiel. Schwarz +11 Punkte. Legale Zuege: 4. Schach! Criticality: 0.55. AUFGABE empfohlen (Material-Floor). Memory: 5 position hit(s) + 0 opponent hit(s). Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Rxf3 (Captures attacking knight with rook, removes check, maintains rook activity on open file.) | Kh1 (King escapes check safely to corner, avoids material loss, keeps g2 pawn structure intact.) | Kf1 (King …
- chess.js.legal_moves0ms
- llm.candidates9916ms · $0.0033
full reasoning
Candidates: Rxf3 (Captures attacking knight with rook, removes check, maintains rook activity on open file.) | Kh1 (King escapes check safely to corner, avoids material loss, keeps g2 pawn structure intact.) | Kf1 (King steps away from check toward center, activates king slightly for potential endgame.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rxf3 — Captures the checking knight directly, removes threat, gains material (rook takes knight for free). Active piece principle: rook stays central on f3. Kh1/Kf1 leave the knight alive to continue harassme…
- llm.reflect57881ms · $0.0446
full reasoning
Final pick: Rxf3 — Captures the checking knight directly, removes threat, gains material (rook takes knight for free). Active piece principle: rook stays central on f3. Kh1/Kf1 leave the knight alive to continue harassment.. Rejected: g1h1, g1f1.
9. Commit Commit Rxf3 (e3f3).
40...Bxf2+Sonnet
1. Observe Halbzug 40, Schwarz am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 26. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng279ms · fail
5. Plan Phase: middlegame. Halbzug 40, Schwarz am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 26. Criticality: 0.10. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-…
full reasoning
Phase: middlegame. Halbzug 40, Schwarz am Zug. Phase: Mittelspiel. Schwarz +8 Punkte. Legale Zuege: 26. Criticality: 0.10. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Bxf2+ (Wins f2 pawn with forcing check; White must respond, keeping Black's initiative and +8 material edge.) | Bd4 (Centralizes bishop to dominant square, threatens Bxf2 next move while controlling key centr…
- chess.js.legal_moves0ms
- llm.candidates72311ms · $0.0554
full reasoning
Candidates: Bxf2+ (Wins f2 pawn with forcing check; White must respond, keeping Black's initiative and +8 material edge.) | Bd4 (Centralizes bishop to dominant square, threatens Bxf2 next move while controlling key central squares.) | Nf6 (Activates knight to active post, directly attacks White's e4 pawn, fulfilling plan to pressure weak pawns.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxf2+ — Wins f2 pawn immediately with forcing check; White king must move, then Bd4 retreat nets the pawn plus centralizes the bishop. More forcing than Bd4 first since White can't interpose.. Rejected: b6d4,…
- llm.reflect115884ms · $0.0747
full reasoning
Final pick: Bxf2+ — Wins f2 pawn immediately with forcing check; White king must move, then Bd4 retreat nets the pawn plus centralizes the bishop. More forcing than Bd4 first since White can't interpose.. Rejected: b6d4, g8f6.
9. Commit Commit Bxf2+ (b6f2).
41.Kxf2Sonnet
1. Observe Halbzug 41, Weiss am Zug. Phase: Endspiel. Schwarz +9 Punkte. Legale Zuege: 4. Schach! Criticality: 0.55. 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-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Escape check while recovering material from f2 bishop, then stabilize king on the back rank. Lucena heuristic applies: preserve rook activity at all costs — the rook is White's only fighting piece. Avoid …
- llm.plan101028ms · $0.0869
full reasoning
Phase: endgame. Escape check while recovering material from f2 bishop, then stabilize king on the back rank. Lucena heuristic applies: preserve rook activity at all costs — the rook is White's only fighting piece. Avoid further tactical losses over next 3 moves. Capture the f2 bishop to relieve check and close the material gap, then use an active rook against Black's kingside pawn cluster — Philidor/Lucena technique gives the only realistic survival framework in a rook ending. Critical: bishop on f2 delivers check — only 4 legal replies exist; material deficit ~9 pts near resignation threshold; h8 rook blocked by own h7 pawn — h-file invasion not yet imminent; Black knight+2-bishop+rook battery overwhelms after any passive king retreat.
6. Candidates Candidates: Kxf2 (King captures checking bishop: gains material, preserves rook on f3 — Lucena principle: keep rook active as only fighting piece.) | Rxf2 (Rook eliminates dangerous f2 bishop, relieving check; rook stays…
- chess.js.legal_moves0ms
- llm.candidates42976ms · $0.0327
full reasoning
Candidates: Kxf2 (King captures checking bishop: gains material, preserves rook on f3 — Lucena principle: keep rook active as only fighting piece.) | Rxf2 (Rook eliminates dangerous f2 bishop, relieving check; rook stays active on f2 per Philidor survival framework.) | Kh1 (Passive king retreat avoids tactical complications; bishop on f2 remains — controlled risk but concedes initiative.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxf2 — King captures bishop eliminates the checking piece and gains material (~3pts), closing the deficit gap. Lucena principle preserved: rook stays active on f3 as sole fighting piece without being diverted…
- llm.reflect9413ms · $0.0030
full reasoning
Final pick: Kxf2 — King captures bishop eliminates the checking piece and gains material (~3pts), closing the deficit gap. Lucena principle preserved: rook stays active on f3 as sole fighting piece without being diverted to f2 duty.. Rejected: f3f2, g1h1.
9. Commit Commit Kxf2 (g1f2).
42...Ke7Sonnet
1. Observe Halbzug 42, Schwarz am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 20. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng742ms · fail
5. Plan Phase: endgame. Activate the passive back-rank pieces (Bc8, Ng8, Rh8) and centralize the king. Priority: Ke7 to free the back rank, Nf6 to attack e4 and contest the f-file, Rf8 to challenge White's active rook. Convert m…
- llm.plan65423ms · $0.0412
full reasoning
Phase: endgame. Activate the passive back-rank pieces (Bc8, Ng8, Rh8) and centralize the king. Priority: Ke7 to free the back rank, Nf6 to attack e4 and contest the f-file, Rf8 to challenge White's active rook. Convert material advantage (+6) before White's rook can create counterplay via Rf7. Use Black's overwhelming material advantage (B+N+R vs lone R) by coordinating king, knight, and bishop against White's lone rook, then advance the kingside pawn majority (f7-g7-h7) to create a decisive passed pawn. Critical: White Rf3→Rf7 threat wins the f7 pawn if Black stays passive; All three Black pieces (Bc8, Ng8, Rh8) are on the back rank — piece passivity is the main danger; according to Chess.com endgame articles, an active rook can outperform a passive bishop+knight pair; e5-e4 pawn lock means direct central breakthrough is unavailable — king infiltration and kingside pawn advances are the winning plan; Black king must leave e8 immediately to avoid back-rank coordination problems.
6. Candidates Candidates: Ke7 (Plan's top priority: king leaves back rank, avoids Rf7 fork threat, activates for endgame infiltration.) | Nf6 (Activates passive knight, attacks e4, contests f-file — directly addresses plan's piece-pas…
- chess.js.legal_moves0ms
- llm.candidates30022ms · $0.0253
full reasoning
Candidates: Ke7 (Plan's top priority: king leaves back rank, avoids Rf7 fork threat, activates for endgame infiltration.) | Nf6 (Activates passive knight, attacks e4, contests f-file — directly addresses plan's piece-passivity danger.) | Be6 (Develops bishop from back rank, supports king march, controls d5/f5 against lone White rook.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke7 — King immediately guards f7 against the Rf7 threat while leaving the back rank. According to endgame theory cited above, passive back-rank pieces vs an active rook is the main danger — Ke7 resolves both …
- llm.reflect58813ms · $0.0329
full reasoning
Final pick: Ke7 — King immediately guards f7 against the Rf7 threat while leaving the back rank. According to endgame theory cited above, passive back-rank pieces vs an active rook is the main danger — Ke7 resolves both at once and centralizes the king for infiltration.. Rejected: g8f6, c8e6.
9. Commit Commit Ke7 (e8e7).
43.Rxf7+Sonnet
1. Observe Halbzug 43, Weiss am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 25. 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-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Exploit Black's passive Ng8/Rh8/Bc8 before they coordinate. Drive rook to 7th rank via f7 threat or swing to queenside. Advance a2-a4-a5 or b2-b4 to create a passed pawn that forces Black to divert a piec…
- llm.plan48830ms · $0.0301
full reasoning
Phase: endgame. Exploit Black's passive Ng8/Rh8/Bc8 before they coordinate. Drive rook to 7th rank via f7 threat or swing to queenside. Advance a2-a4-a5 or b2-b4 to create a passed pawn that forces Black to divert a piece — buying tempo against material deficit. White's only survival path is a queenside passed pawn combined with rook harassment of Black's kingside cluster (f7/g7/h7); Philidor defensive technique on the e-file neutralizes Black's central e5-pawn while the rook generates enough counterplay to hold a draw against the B+N surplus. Critical: Black will play ...Ng8-f6 or ...Ng6 soon — once the knight activates, White's rook loses tactical targets; Rh8 connecting to active file (e.g. ...Rh8-e8 or ...Rf8) would strengthen Black's grip — must act before this; White's rook on f3 threatens nothing currently — must relocate to f7 or a3 this move to justify existence (Philidor heuristic: rook activity preserved at all costs, memory hit #1).
6. Candidates Candidates: Rxf7+ (Penetrates 7th rank with check, wins pawn, harrasses Black's kingside cluster before Ng8 activates. Plan heuristic #1: rook to f7.) | Ra3 (Relocates idle rook to a3 per Philidor heuristic #1; enables a…
- chess.js.legal_moves0ms
- llm.candidates26228ms · $0.0206
full reasoning
Candidates: Rxf7+ (Penetrates 7th rank with check, wins pawn, harrasses Black's kingside cluster before Ng8 activates. Plan heuristic #1: rook to f7.) | Ra3 (Relocates idle rook to a3 per Philidor heuristic #1; enables a4-a5 passed pawn to divert Black's piece surplus.) | Rf5 (Active central post attacking e5; creates multi-threat pressure before Black connects Rh8-e8 or plays Ng8-f6.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rxf7+ — Penetrates 7th rank with check, wins f7-pawn immediately, displaces Black's king, and harrasses the passive kingside cluster (Ng8/Rh8) before the knight activates via Nf6. Rook on f7 pins g7/h7 pawns …
- llm.reflect10058ms · $0.0037
full reasoning
Final pick: Rxf7+ — Penetrates 7th rank with check, wins f7-pawn immediately, displaces Black's king, and harrasses the passive kingside cluster (Ng8/Rh8) before the knight activates via Nf6. Rook on f7 pins g7/h7 pawns and generates maximum counterplay per Philidor heuristic #1.. Rejected: f3a3, f3f5.
9. Commit Commit Rxf7+ (f3f7).
44...Kxf7Sonnet
1. Observe Halbzug 44, Schwarz am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 5. Schach! Criticality: 0.55.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng384ms · fail
5. Plan Phase: endgame. Escape the rook check this ply by moving the king to a square that minimizes immediate re-check threats, then prioritize knight activation on the next move to simultaneously attack White's rook and contes…
- llm.plan111763ms · $0.0745
full reasoning
Phase: endgame. Escape the rook check this ply by moving the king to a square that minimizes immediate re-check threats, then prioritize knight activation on the next move to simultaneously attack White's rook and contest the central pawn. Deny White's rook the ability to generate perpetual harassment by reducing its mobility through piece coordination within 3 moves. Convert dominant material advantage (bishop plus knight plus rook vs lone rook) by neutralizing White's hyperactive rook through knight and bishop coordination, centralizing the king as an attacking piece, and advancing the kingside pawn majority to create a decisive passed pawn that the lone rook cannot stop. Critical: Rook on seventh rank currently delivering check — all five legal options are king moves, no interposition or capture possible given adjacency; Escape square selection is critical: any king destination that allows immediate re-check wastes a full tempo and prolongs back-rank passivity; Knight activation is the single highest-priority follow-up — once it reaches a central attacking square it simultaneously threatens the rook and the advanced white pawn; According to active-pieces principle (House of Staunton, sourced above), Black's three passive back-rank pieces make the material advantage illusory until activity is restored — every check White delivers delays this.
6. Candidates Candidates: Kxf7 (Captures White's only active piece; king centralizes; all re-check threats eliminated; decisive material conversion.) | Kd6 (Centralizes king avoiding e-file; Rd7+ re-check requires Kc6, but king target…
- chess.js.legal_moves0ms
- llm.candidates78312ms · $0.0455
full reasoning
Candidates: Kxf7 (Captures White's only active piece; king centralizes; all re-check threats eliminated; decisive material conversion.) | Kd6 (Centralizes king avoiding e-file; Rd7+ re-check requires Kc6, but king targets e5-pawn support.) | Ke6 (King centralizes toward pawn majority; Rf6+ re-check forces Ke5 activating king further.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxf7 — Captures White's only active piece immediately. After Kxf7 White has zero pieces vs. Black's rook, bishop, knight plus pawns — no further checks possible, conversion is trivial.. Rejected: e7d6, e7e6.
- llm.reflect34791ms · $0.0253
9. Commit Commit Kxf7 (e7f7).
45.a4Sonnet
1. Observe Halbzug 45, Weiss am Zug. Phase: Endspiel. Schwarz +10 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_search8ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance queenside pawns (a2-a4, b2-b4) before Black activates Ng8-f6 and the rook enters. Centralize king toward d3-c4 using the opposition heuristic to support pawn advances. Force Black to divert pieces…
- llm.plan60776ms · $0.0423
full reasoning
Phase: endgame. Advance queenside pawns (a2-a4, b2-b4) before Black activates Ng8-f6 and the rook enters. Centralize king toward d3-c4 using the opposition heuristic to support pawn advances. Force Black to divert pieces to the queenside, buying maximum counterplay against the R+B+N deficit. White's sole survival path is a queenside passed pawn — push a- or b-pawn to promotion threat territory, forcing Black to sacrifice material to stop it; the opposition principle drives king centralization to c4 or d4 to escort the passer, while the locked e4-e5 center keeps Black's pieces temporarily cramped on the kingside cluster. Critical: Ng8-f6 imminent — attacks e4 pawn and activates Black's minor piece coordination; must act this move; Black rook on h8 threatens to swing to d8 or e8, dominating open files before White queenside pawns can move; Bishop c8 can blockade a-file or b-file in one move — timing of pawn advances is critical; Opposition rule: White king must reach d3 or c4 now to stay relevant; passive king on f2 loses immediately; Black +10 material — AUFGABE territory, but a passed pawn on a5-a6 or b5-b6 is the only drawing try.
6. Candidates Candidates: a4 (Immediate queenside passer threat; skips tempo-wasting a3, races toward a5 before Ng8-f6 activates.) | b4 (Creates dual queenside pawn majority; b4-b5 fork threat forces Black to divert bishop or rook.) |…
- chess.js.legal_moves0ms
- llm.candidates21891ms · $0.0145
full reasoning
Candidates: a4 (Immediate queenside passer threat; skips tempo-wasting a3, races toward a5 before Ng8-f6 activates.) | b4 (Creates dual queenside pawn majority; b4-b5 fork threat forces Black to divert bishop or rook.) | Ke3 (Opposition heuristic: king centralizes toward d3-c4 to escort queenside passer; passive king on f2 loses immediately.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: a4 — a-pawn has a clear unobstructed promotion path (no Black pawns on a-file); a4 skips a3 tempo-loss and races to a5-a6-a7 before Ng8-f6 activates and Black's bishop can reach the a6 blockade square.. Rejec…
- llm.reflect75821ms · $0.0589
full reasoning
Final pick: a4 — a-pawn has a clear unobstructed promotion path (no Black pawns on a-file); a4 skips a3 tempo-loss and races to a5-a6-a7 before Ng8-f6 activates and Black's bishop can reach the a6 blockade square.. Rejected: b2b4, f2e3.
9. Commit Commit a4 (a2a4).
46...Nf6Sonnet
1. Observe Halbzug 46, Schwarz am Zug. Phase: Endspiel. Schwarz +10 Punkte. Legale Zuege: 20. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng496ms · fail
5. Plan Phase: endgame. Swing rook to a-file to freeze White's passed a4-pawn, then route the passive g8-knight via f6 toward d5/e4 to both attack a pawn and centralize. King joins via e6 or e7 within 3 moves. Convert the crushi…
- llm.plan85972ms · $0.0576
full reasoning
Phase: endgame. Swing rook to a-file to freeze White's passed a4-pawn, then route the passive g8-knight via f6 toward d5/e4 to both attack a pawn and centralize. King joins via e6 or e7 within 3 moves. Convert the crushing material surplus (B+N+R versus four bare pawns, no White pieces) by neutralizing White's sole counterplay — the a4 passed pawn — then using coordinated piece activity to pick off White's remaining pawns one by one. Critical: White's a4 passed pawn is unchallenged and promotes if rook doesn't reach the a-file within 1-2 moves; Knight on g8 is maximally passive (rim); activating it to f6 immediately threatens the e4-pawn and is the most impactful piece upgrade per endgame theory; White's e4-pawn is a secondary tactical target once knight lands on f6 — direct attack no White piece can defend.
6. Candidates Candidates: Nf6 (Rim knight to center; immediately attacks undefended e4-pawn, maximises piece activity per plan.) | Ke6 (King centralises to e6, controls d5/f5, supports pawn chain and restricts White's king.) | Bf5 (Bi…
- chess.js.legal_moves0ms
- llm.candidates105440ms · $0.0175
full reasoning
Candidates: Nf6 (Rim knight to center; immediately attacks undefended e4-pawn, maximises piece activity per plan.) | Ke6 (King centralises to e6, controls d5/f5, supports pawn chain and restricts White's king.) | Bf5 (Bishop activates to f5, directly attacks e4-pawn; coordinates with incoming Nf6 double pressure.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf6 — Knight leaps from rim to optimal central square, immediately threatening the undefended e4-pawn; bishop and rook stay flexible for a-pawn containment; most impactful single piece upgrade per endgame act…
- llm.reflect40281ms · $0.0301
full reasoning
Final pick: Nf6 — Knight leaps from rim to optimal central square, immediately threatening the undefended e4-pawn; bishop and rook stay flexible for a-pawn containment; most impactful single piece upgrade per endgame activation theory.. Rejected: f7e6, c8f5.
9. Commit Commit Nf6 (g8f6).
47.b4Sonnet
1. Observe Halbzug 47, Weiss am Zug. Phase: Endspiel. Schwarz +10 Punkte. Legale Zuege: 14. Criticality: 0.10. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Push b2-b4 immediately, then coordinate a4-a5 / b4-b5 to force a queenside passed pawn. Centralize king via e3-d4-c5 using the opposition heuristic to escort the passer. Race the clock before Black's rook…
- llm.plan38809ms · $0.0231
full reasoning
Phase: endgame. Push b2-b4 immediately, then coordinate a4-a5 / b4-b5 to force a queenside passed pawn. Centralize king via e3-d4-c5 using the opposition heuristic to escort the passer. Race the clock before Black's rook enters via d8 or c8. Create a passed pawn on the a- or b-file that demands a Black piece sacrifice to stop — White's sole survival path against the R+B+N deficit is to make promotion threats so concrete that Black either blunders or concedes material parity. Critical: Black rook activating h8-d8 or h8-c8 to blockade the queenside — must push before it arrives; Black knight Nf6-d5 forking the queenside pawns once centralized — monitor timing; Opposition principle (memory hit #3): Kf2-e3-d4-c5 critical to escort passer; losing a tempo here loses the race; Philidor-style defense (memory hit #1): Black will use rook + knight to create a blockade wall — queenside push must begin this move.
6. Candidates Candidates: b4 (Executes plan's 'push b2-b4 immediately'; creates b4-b5 passer threat before Black rook activates d8/c8.) | a5 (Locks queenside space; threatens a6 breakthrough and coordinates with b4 to force a passed p…
- chess.js.legal_moves0ms
- llm.candidates18276ms · $0.0111
full reasoning
Candidates: b4 (Executes plan's 'push b2-b4 immediately'; creates b4-b5 passer threat before Black rook activates d8/c8.) | a5 (Locks queenside space; threatens a6 breakthrough and coordinates with b4 to force a passed pawn.) | Ke3 (Opposition heuristic (memory hit #3): starts Ke3-d4-c5 king march to escort queenside passer.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: b4 — Most forcing move: creates immediate b4-b5 breakthrough threat before Black's rook reaches d8/c8. Every tempo spent on Ke3 or a5 first gifts Black a free rook activation move, enabling the blockade the p…
- llm.reflect27764ms · $0.0191
full reasoning
Final pick: b4 — Most forcing move: creates immediate b4-b5 breakthrough threat before Black's rook reaches d8/c8. Every tempo spent on Ke3 or a5 first gifts Black a free rook activation move, enabling the blockade the plan warns against.. Rejected: a4a5, f2e3.
9. Commit Commit b4 (b2b4).
48...Nxe4+Sonnet
1. Observe Halbzug 48, Schwarz am Zug. Phase: Endspiel. Schwarz +10 Punkte. Legale Zuege: 28. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng226ms · fail
5. Plan Phase: endgame. Knight captures the undefended central pawn with check to gain material and force White king to misplace; rook immediately swings to the a-file to permanently blockade White's dangerous passed a-pawn; Bla…
- llm.plan115901ms · $0.0774
full reasoning
Phase: endgame. Knight captures the undefended central pawn with check to gain material and force White king to misplace; rook immediately swings to the a-file to permanently blockade White's dangerous passed a-pawn; Black king centralizes toward the center — coordinate all three pieces within 3 moves. Convert the massive piece surplus (rook, bishop, knight vs. five bare pawns) by neutralizing White's sole counterplay — the passed a-pawn — via rook blockade on the a-file per classical endgame theory confirmed in web research, then methodically harvest White's kingside pawns with coordinated piece pressure. Critical: White's a4 passed pawn is completely unchallenged and advances freely if rook stays on h-file for even 2 moves — this is the only real counterplay White possesses; Knight on f6 can capture White's central pawn immediately with check, winning material while forcing the White king to retreat and lose coordination; Bishop on c8 is maximally passive — must activate via d7 toward b5 or a6 to join the queenside pawn harvest and close out the a4/b4 cluster.
6. Candidates Candidates: Nxe4+ (Wins central pawn with check, forces White king to retreat and lose coordination, gaining material with tempo.) | Bd7 (Activates passive bishop toward queenside, clears c8 to eventually free rook towar…
- chess.js.legal_moves0ms
- llm.candidates31784ms · $0.0208
full reasoning
Candidates: Nxe4+ (Wins central pawn with check, forces White king to retreat and lose coordination, gaining material with tempo.) | Bd7 (Activates passive bishop toward queenside, clears c8 to eventually free rook toward a-file blockade.) | Nd5 (Centralizes knight on dominant outpost, targets b4 pawn and pressures queenside passed-pawn cluster.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxe4+ — Wins the unguarded e4 pawn with check, forcing White king to misplace (Ke3/Ke2). Knight lands on dominant e4 outpost; rook immediately swings to a8 to permanently blockade the dangerous a4-b4 passed p…
- llm.reflect56819ms · $0.0451
full reasoning
Final pick: Nxe4+ — Wins the unguarded e4 pawn with check, forcing White king to misplace (Ke3/Ke2). Knight lands on dominant e4 outpost; rook immediately swings to a8 to permanently blockade the dangerous a4-b4 passed pawn duo before it advances.. Rejected: c8d7, f6d5.
9. Commit Commit Nxe4+ (f6e4).
49.Ke3Sonnet
1. Observe Halbzug 49, Weiss am Zug. Phase: Endspiel. Schwarz +11 Punkte. Legale Zuege: 6. Schach! Criticality: 0.35. 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-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search4ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Escape check by moving king toward d3-c4 corridor, keeping the queenside pawn advance alive. King must reach c5 within 3-4 moves to escort a4-a5 / b4-b5 before Black's rook quits the h-file and blockades.…
- llm.plan58313ms · $0.0428
full reasoning
Phase: endgame. Escape check by moving king toward d3-c4 corridor, keeping the queenside pawn advance alive. King must reach c5 within 3-4 moves to escort a4-a5 / b4-b5 before Black's rook quits the h-file and blockades. Knight on e4 is a tempo-gift if White ignores it after escaping check — let it roam while the pawns roll. Create a connected queenside passed pawn (a5+b5 → a6 or b6) so deeply advanced that Black must sacrifice the rook or bishop to stop promotion, reducing the material deficit to survivable odds. Critical: Knight e4 currently checks — only legal responses are king moves; 6 options available, king direction toward e3/d3 preferred over retreating to f1/g1; Black rook h8 is dormant but will activate to d8 or c8 to blockade once pawns advance — the queenside push must beat this entry by 2-3 tempi; Opposition heuristic (memory hit): king must reach c5 via e3-d4-c5 to hold opposition against Black king f7 and escort pawns; retreating king loses this escort race; Black knight e4 controls g3 and d2 — king must avoid those squares when escaping check.
6. Candidates Candidates: Ke3 (Escapes check while moving toward d4-c5 corridor; king reaches c5 opposition escort route within 2 moves.) | Kf3 (Escapes check, avoids d2/g3 knight control squares, keeps king active near center for que…
- chess.js.legal_moves0ms
- llm.candidates9908ms · $0.0037
full reasoning
Candidates: Ke3 (Escapes check while moving toward d4-c5 corridor; king reaches c5 opposition escort route within 2 moves.) | Kf3 (Escapes check, avoids d2/g3 knight control squares, keeps king active near center for queenside march.) | Ke2 (Sidesteps check centrally; one step toward d3-c4 corridor, though slower than Ke3 for c5 escort race.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke3 — Ke3 lands directly on the e3-d4-c5 escort highway — reaches c5 in exactly 2 more moves, beating Black rook activation to d8/c8 by the critical 1-tempo margin the queenside push requires.. Rejected: f2f3…
- llm.reflect25897ms · $0.0213
full reasoning
Final pick: Ke3 — Ke3 lands directly on the e3-d4-c5 escort highway — reaches c5 in exactly 2 more moves, beating Black rook activation to d8/c8 by the critical 1-tempo margin the queenside push requires.. Rejected: f2f3, f2e2.
9. Commit Commit Ke3 (f2e3).
50...Nc5Sonnet
1. Observe Halbzug 50, Schwarz am Zug. Phase: Endspiel. Schwarz +11 Punkte. Legale Zuege: 30. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng318ms · fail
5. Plan Phase: endgame. Swing the rook to the a-file to permanently blockade White's a4 pawn; maneuver the knight from e4 to c5 or c3 where it forks-attacks the a4 pawn directly; centralize the king toward d5. According to chess…
- llm.plan88820ms · $0.0571
full reasoning
Phase: endgame. Swing the rook to the a-file to permanently blockade White's a4 pawn; maneuver the knight from e4 to c5 or c3 where it forks-attacks the a4 pawn directly; centralize the king toward d5. According to chessstrategyonline.com, 'after getting a knight outpost, turn the square into another advantage rather than admiring the knight' — so the knight must pivot from passive anchor to active attacker of White's pawn duo. Neutralize White's sole counterplay — the a4-b4 pawn duo — via rook blockade on the a-file plus knight pressure on a4, then coordinate bishop, king, and rook to harvest White's kingside pawns (g2, h2) and convert the massive piece surplus. Critical: White's a4 advance to a5 creates a dangerous outside passed pawn — must be stopped before any kingside action; Black's bishop on c8 is entirely passive and needs activation via b7 or along a long diagonal; Knight on e4 is strong but static — per simplifychess.com blockade theory, a rook on a-file is the primary blockading tool while knight migrates to attacking role on c5/c3.
6. Candidates Candidates: Nc5 (Knight attacks a4 pawn directly per plan; pivots from passive outpost to active attacker of White's pawn duo.) | Nc3 (Knight forks b4 pawn and pressures a4 indirectly; forces White to defend both pawns s…
- chess.js.legal_moves0ms
- llm.candidates31307ms · $0.0240
full reasoning
Candidates: Nc5 (Knight attacks a4 pawn directly per plan; pivots from passive outpost to active attacker of White's pawn duo.) | Nc3 (Knight forks b4 pawn and pressures a4 indirectly; forces White to defend both pawns simultaneously.) | Rd8 (First step swinging rook toward a-file; prepares Ra8 blockade to permanently stop White's a4-a5 advance.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nc5 — Nc5 attacks a4 immediately. If White plays a5 (the feared passer), Nb3 follows attacking a5 directly. If White plays b5, Nxa4 wins a pawn outright. Knight pivots from static outpost to active pawn-hunte…
- llm.reflect80291ms · $0.0645
full reasoning
Final pick: Nc5 — Nc5 attacks a4 immediately. If White plays a5 (the feared passer), Nb3 follows attacking a5 directly. If White plays b5, Nxa4 wins a pawn outright. Knight pivots from static outpost to active pawn-hunter.. Rejected: e4c3, h8d8.
9. Commit Commit Nc5 (e4c5).
51.bxc5Sonnet
1. Observe Halbzug 51, Weiss am Zug. Phase: Endspiel. Schwarz +11 Punkte. Legale Zuege: 11. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Save the a-pawn from immediate knight capture, then advance both queenside pawns with king escort toward the d4-c4 corridor. Force Black's rook off the h-file by creating a passed pawn pair that demands b…
- llm.plan63301ms · $0.0435
full reasoning
Phase: endgame. Save the a-pawn from immediate knight capture, then advance both queenside pawns with king escort toward the d4-c4 corridor. Force Black's rook off the h-file by creating a passed pawn pair that demands blockade attention. Create a promotion threat on at least one queenside file within 4-5 moves. Push the queenside pawn majority as a connected duo deep enough that Black's pieces — including a rook that can apply Philidor's third-rank defense — cannot cover both files, forcing material concession and reducing the eleven-point deficit to survivable odds. Critical: Immediate tactical threat: the knight on c5 attacks the a4-pawn — if White delays, material deficit worsens further; Black's rook is perfectly placed to swing via the a-file and apply Philidor's method once any pawn reaches the sixth rank — advance must be fast, not slow; White king needs opposition-like coordination with the pawn duo to escort without being cut off by the knight and bishop battery; The g2-h2 kingside pawns are idle but may draw Black's rook laterally if pushed, creating a distraction — low priority but not zero.
6. Candidates Candidates: bxc5 (Captures the knight threatening a4, gains ~2 material points, creates dangerous advanced passed c-pawn demanding Black's blockade attention immediately.) | a5 (Moves a-pawn out of knight's reach (c5 kni…
- chess.js.legal_moves0ms
- llm.candidates50269ms · $0.0377
full reasoning
Candidates: bxc5 (Captures the knight threatening a4, gains ~2 material points, creates dangerous advanced passed c-pawn demanding Black's blockade attention immediately.) | a5 (Moves a-pawn out of knight's reach (c5 knight cannot reach a5), preserving both queenside pawns for a connected duo advance.) | b5 (Aggressive pawn push creating immediate promotion threat; if Nxa4, b6 races toward queening forcing Black's rook off the h-file to cope.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: bxc5 — Captures the knight threatening a4, gains ~2 material points, creates dangerous advanced passed c-pawn demanding Black's blockade attention immediately.. Rejected: a4a5, b4b5. [LLM note: Claude CLI sub…
full reasoning
Final pick: bxc5 — Captures the knight threatening a4, gains ~2 material points, creates dangerous advanced passed c-pawn demanding Black's blockade attention immediately.. Rejected: a4a5, b4b5. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit bxc5 (b4c5).
52...Bd7Sonnet
1. Observe Halbzug 52, Schwarz am Zug. Phase: Endspiel. Schwarz +8 Punkte. Legale Zuege: 23. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search (endgame, SearXNG + summary): This is a complex endgame where Black (to move) has a bishop and rook against White's passed c5-pawn and a-pawn. The position resembles a Rook-and-Minor-Piece endgame with active …
- web_search.searxng941ms
- llm.research_summary24836ms · $0.0043
full reasoning
Web search (endgame, SearXNG + summary): This is a complex endgame where Black (to move) has a bishop and rook against White's passed c5-pawn and a-pawn. The position resembles a Rook-and-Minor-Piece endgame with active passed pawns on both sides. Black must act decisively to bloc…
5. Plan Phase: endgame. Move the passive bishop off c8 to d7 or e6 — this blocks c5-c6 advance, vacates the promotion square, and activates the piece in one tempo; swing the rook from h8 to the a-file to attack and win White's a…
- llm.plan89792ms · $0.0566
full reasoning
Phase: endgame. Move the passive bishop off c8 to d7 or e6 — this blocks c5-c6 advance, vacates the promotion square, and activates the piece in one tempo; swing the rook from h8 to the a-file to attack and win White's a4 pawn; then centralize the king toward e6-d6 to escort Black's own e5-e4 passer. Convert Black's crushing material advantage (rook + bishop vs bare passed pawns) by neutralizing White's dangerous c5-passer via Bd7 blockade, harvesting the a4 pawn with the rook, then coordinating king and pawns to advance e5-e4-e3 and b7-b5-b4 as unstoppable promotion threats. Critical: White's c5-pawn queens in 3 moves if unblocked — bishop must move to d7 or e6 immediately; Black's bishop on c8 is blocking its own rook's use of the c-file and sitting on White's promotion square; According to ChessBase rook-vs-passer theory, the rook is a poor static blockader — use the bishop to stop c5, free the rook for active a4-hunting; White's king on e3 is well-centralized and may try to escort the c5-pawn — Black's king must counter-centralize to d6 to contest this.
6. Candidates Candidates: Bd7 (Blocks c5-c6 queening in 3 moves; activates bishop and vacates c8 promotion square per plan.) | Be6 (Stops c5 advance while centralizing bishop; covers d5 and supports Black king march to d6.) | e4 (Adva…
- chess.js.legal_moves0ms
- llm.candidates15455ms · $0.0096
full reasoning
Candidates: Bd7 (Blocks c5-c6 queening in 3 moves; activates bishop and vacates c8 promotion square per plan.) | Be6 (Stops c5 advance while centralizing bishop; covers d5 and supports Black king march to d6.) | e4 (Advances Black's own passer immediately, forcing White king to deal with e4-e3 threat as counter-play.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bd7 — Bd7 covers c6 along the d7-c6 diagonal, blocking c5-c6-c7-c8=Q, AND simultaneously attacks White's a4 pawn — one move addresses the queening threat and wins material.. Rejected: c8e6, e5e4.
- llm.reflect69419ms · $0.0537
9. Commit Commit Bd7 (c8d7).
53.c6Sonnet
1. Observe Halbzug 53, Weiss am Zug. Phase: Endspiel. Schwarz +8 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_search6ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search1ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance c5-c6 immediately to force Black's rook off h8 and into active blockade duty. Follow with Kd4 to escort the c-pawn toward c7. Use a4-a5 as a secondary threat to split Black's defensive resources a…
- llm.plan55781ms · $0.0394
full reasoning
Phase: endgame. Advance c5-c6 immediately to force Black's rook off h8 and into active blockade duty. Follow with Kd4 to escort the c-pawn toward c7. Use a4-a5 as a secondary threat to split Black's defensive resources across two files. Target c7 promotion scare within 4 moves. Convert the c5 passed pawn into a promotion threat deep enough to paralyze Black's rook and bishop in passive roles, exploiting the Philidor memory heuristic — if Black's rook must defend from the 3rd rank, White king can close in; once pawn hits c7 Black is forced into Lucena-pattern defense which under mutual zugzwang pressure may yield one tempo concession and reduce the material gap. Critical: Black's rook h8 can swing to c8 or h1-c1 to block the c-pawn — timing of c5-c6 must outpace rook activation; Black bishop d7 covers c8 (dark square? — no, d7 is light, c8 is dark — bishop CANNOT reach c8), meaning c7-c8 promotion square is bishop-blind and rook must do all blockade work alone; Black's e5 counter-pawn could advance or king on f7 could march to e6-d5 to blockade — king race critical; White g2/h2 pawns are passive but pin Black's h7/g7 structure; do not advance prematurely.
6. Candidates Candidates: c6 (Advance passed pawn immediately; Black's bishop (d7, light) cannot cover c8 (dark), so rook alone must blockade.) | Ke4 (King marches toward c5-c6 pawn to escort promotion; active piece play heuristic dem…
- chess.js.legal_moves0ms
- llm.candidates20297ms · $0.0124
full reasoning
Candidates: c6 (Advance passed pawn immediately; Black's bishop (d7, light) cannot cover c8 (dark), so rook alone must blockade.) | Ke4 (King marches toward c5-c6 pawn to escort promotion; active piece play heuristic demands king centralization now.) | a5 (Creates secondary queenside threat splitting Black's rook and bishop across two files, exploiting multiple-threat heuristic.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c6 — Advance passed pawn immediately; Black's bishop (d7, light) cannot cover c8 (dark), so rook alone must blockade.. Rejected: e3e4, a4a5. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit c6 (c5c6).
54...bxc6Sonnet
1. Observe Halbzug 54, Schwarz am Zug. Phase: Endspiel. Schwarz +8 Punkte. Legale Zuege: 29. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng499ms · fail
5. Plan Phase: endgame. Halbzug 54, Schwarz am Zug. Phase: Endspiel. Schwarz +8 Punkte. Legale Zuege: 29. Criticality: 0.00. No memory context available. Plan: activate the king, create passed pawns, defend prophylactically. [LL…
full reasoning
Phase: endgame. Halbzug 54, Schwarz am Zug. Phase: Endspiel. Schwarz +8 Punkte. Legale Zuege: 29. Criticality: 0.00. No memory context available. Plan: activate the king, create passed pawns, defend prophylactically. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: bxc6 (Eliminates White's only counterplay (c6 passer). According to TheChessWorld article: neutralize dangerous passed pawn immediately before it reaches c7.) | Ke6 (Activates king toward center, fitting the …
- chess.js.legal_moves0ms
- llm.candidates66367ms · $0.0221
full reasoning
Candidates: bxc6 (Eliminates White's only counterplay (c6 passer). According to TheChessWorld article: neutralize dangerous passed pawn immediately before it reaches c7.) | Ke6 (Activates king toward center, fitting the plan. North Texas Chess Academy: coordinate pieces first, then convert material advantage.) | e4 (Creates a dangerous passed e-pawn, pushes White king back. Generates own winning threat to pair with material advantage.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: bxc6 — bxc6 eliminates White's only dangerous asset AND creates Black's own passed c-pawn. With R+B supporting it, the c-pawn advances freely to promotion while White has zero counterplay with a4/g2/h2 idle..…
- llm.reflect37059ms · $0.0269
full reasoning
Final pick: bxc6 — bxc6 eliminates White's only dangerous asset AND creates Black's own passed c-pawn. With R+B supporting it, the c-pawn advances freely to promotion while White has zero counterplay with a4/g2/h2 idle.. Rejected: f7e6, e5e4.
9. Commit Commit bxc6 (b7c6).
55.Ke4Sonnet
1. Observe Halbzug 55, Weiss am Zug. Phase: Endspiel. Schwarz +9 Punkte. Legale Zuege: 11. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance a4-a5-a6 as the sole passed-pawn try while marching king toward c4-b5 to escort it; force Black's rook to abandon the h-file and commit to the a-file blockade, buying time for any kingside g-h cou…
- llm.plan94408ms · $0.0757
full reasoning
Phase: endgame. Advance a4-a5-a6 as the sole passed-pawn try while marching king toward c4-b5 to escort it; force Black's rook to abandon the h-file and commit to the a-file blockade, buying time for any kingside g-h counterplay. Create a dual-wing distraction — a-pawn races queenside while g2-h2 advance creates mating-net noise on the kingside — hoping Black's coordination lapses in time-pressure, though the -9 material deficit makes a save objectively unlikely. Critical: Black Rh8-a8 neutralizes a-pawn in one tempo (Philidor cutoff); Black king f7 wins the race to c5 via e6-d5, blocking king escort (opposition lost); Black bishop d7 controls c8 and h3, restricting both a8-promotion square and White king escape routes.
6. Candidates Candidates: a5 (Advances the sole passed pawn immediately; forces Black rook off h-file to contest a-file, activating dual-wing pressure.) | Ke4 (King marches toward c4-b5 escort route; active king supports a-pawn race w…
- chess.js.legal_moves0ms
- llm.candidates26467ms · $0.0183
full reasoning
Candidates: a5 (Advances the sole passed pawn immediately; forces Black rook off h-file to contest a-file, activating dual-wing pressure.) | Ke4 (King marches toward c4-b5 escort route; active king supports a-pawn race while maintaining opposition against Black king.) | g4 (Kingside pawn advance creates dual-wing distraction; forces Black bishop/king to address g4-g5 push while a-pawn advances.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke4 — King marches toward c4-b5 escort route BEFORE pushing a-pawn, delaying the Philidor Ra8 cutoff (heuristic 1) until king is one tempo closer to b5; avoids premature a5 where Ra8 blocks with king still 3 …
- llm.reflect65281ms · $0.0480
full reasoning
Final pick: Ke4 — King marches toward c4-b5 escort route BEFORE pushing a-pawn, delaying the Philidor Ra8 cutoff (heuristic 1) until king is one tempo closer to b5; avoids premature a5 where Ra8 blocks with king still 3 tempi from escort duty.. Rejected: a4a5, g2g4.
9. Commit Commit Ke4 (e3e4).
56...Bf5+Sonnet
1. Observe Halbzug 56, Schwarz am Zug. Phase: Endspiel. Schwarz +9 Punkte. Legale Zuege: 25. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng393ms · fail
5. Plan Phase: endgame. Immediately address the e5 pawn under threat from the White king, then activate the passive rook from the back rank and coordinate Rook + Bishop to shepherd the advanced pawns toward promotion over the ne…
- llm.plan73022ms · $0.0459
full reasoning
Phase: endgame. Immediately address the e5 pawn under threat from the White king, then activate the passive rook from the back rank and coordinate Rook + Bishop to shepherd the advanced pawns toward promotion over the next 3–5 moves. Convert crushing material superiority (Rook + Bishop vs bare pawns) by first neutralizing the only tactical threat against e5, then using rook activity on open files and the bishop's long diagonal to paralyze White's king while advancing the c-pawn and e-pawn as a decisive tandem. Critical: White king on e4 attacks the e5 pawn directly — this is the single immediate threat requiring a concrete defensive response; The rook on h8 is completely passive; according to TheChessWorld endgame theory, a passive rook is 'a big and very often a decisive liability' even for the winning side; White's a4 pawn must not be ignored — while not dangerous now, any uncontested advance could create a distracting counter-passer if Black's king drifts too far.
6. Candidates Candidates: Bf5+ (Check deflects White king from e4, eliminating e5 threat and gaining tempo per deflection principle from simplifychess.com.) | Re8 (Activates passive rook directly behind e5, defending the threatened pa…
- chess.js.legal_moves0ms
- llm.candidates67782ms · $0.0263
full reasoning
Candidates: Bf5+ (Check deflects White king from e4, eliminating e5 threat and gaining tempo per deflection principle from simplifychess.com.) | Re8 (Activates passive rook directly behind e5, defending the threatened pawn while opening h-file for later pawn advances.) | Ke6 (King centralizes to guard e5 directly, freeing rook for active duty and coordinating king-bishop-rook tandem.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bf5+ — Check forces White king off e4 immediately, eliminating the e5 threat while gaining tempo. King must retreat (Kd3/Kf3/Ke3), after which Re8 or Ke6 wins easily with zero defensive obligations.. Rejected…
- llm.reflect36279ms · $0.0276
full reasoning
Final pick: Bf5+ — Check forces White king off e4 immediately, eliminating the e5 threat while gaining tempo. King must retreat (Kd3/Kf3/Ke3), after which Re8 or Ke6 wins easily with zero defensive obligations.. Rejected: h8e8, f7e6.
9. Commit Commit Bf5+ (d7f5).
57.Kxf5Sonnet
1. Observe Halbzug 57, Weiss am Zug. Phase: Endspiel. Schwarz +9 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_search18ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Halbzug 57, Weiss am Zug. Phase: Endspiel. Schwarz +9 Punkte. Legale Zuege: 4. Schach! Criticality: 0.45. AUFGABE empfohlen (Material-Floor). Memory: 5 position hit(s) + 0 opponent hit(s). Plan: activate …
full reasoning
Phase: endgame. Halbzug 57, Weiss am Zug. Phase: Endspiel. Schwarz +9 Punkte. Legale Zuege: 4. Schach! Criticality: 0.45. AUFGABE empfohlen (Material-Floor). Memory: 5 position hit(s) + 0 opponent hit(s). Plan: activate the king, create passed pawns, defend prophylactically. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Kxf5 (Captures the checking bishop; active king play gains material and creates complications near Black king.) | Kxe5 (Centralizes king by capturing pawn; activates king per heuristic, creates passed-pawn po…
- chess.js.legal_moves0ms
- llm.candidates43275ms · $0.0305
full reasoning
Candidates: Kxf5 (Captures the checking bishop; active king play gains material and creates complications near Black king.) | Kxe5 (Centralizes king by capturing pawn; activates king per heuristic, creates passed-pawn potential on a-file.) | Kf3 (Prophylactic retreat per heuristic; escapes check safely, keeps king mobile toward queenside passed pawn.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxf5 — Captures the checking bishop; active king play gains material and creates complications near Black king.. Rejected: e4e5, e4f3. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Kxf5 (e4f5).
58...g6+Sonnet
1. Observe Halbzug 58, Schwarz am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 17. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng544ms · fail
5. Plan Phase: endgame. Halbzug 58, Schwarz am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 17. Criticality: 0.00. No memory context available. Plan: activate the king, create passed pawns, defend prophylactically. [LL…
full reasoning
Phase: endgame. Halbzug 58, Schwarz am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 17. Criticality: 0.00. No memory context available. Plan: activate the king, create passed pawns, defend prophylactically. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: g6+ (Forcing check drives White King off f5; if Kxg6 then Rg8+ recovers tempo and activity.) | e4 (Creates dangerous central passed pawn, per plan; rook supports from h8 via Re8 next.) | Rg8 (Activates passiv…
- chess.js.legal_moves0ms
- llm.candidates72944ms · $0.0406
full reasoning
Candidates: g6+ (Forcing check drives White King off f5; if Kxg6 then Rg8+ recovers tempo and activity.) | e4 (Creates dangerous central passed pawn, per plan; rook supports from h8 via Re8 next.) | Rg8 (Activates passive rook, targets g2 pawn; Tarrasch rule — rook behind passed pawn.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: g6+ — Forcing check ejects White King from dominant f5 square. After Ke4 Re8+ Kd5, Black king marches in; after Kxg6 Rg8+ Black regains full tempo and attacks g2/h2.. Rejected: e5e4, h8g8.
- llm.reflect52806ms · $0.0359
9. Commit Commit g6+ (g7g6).
59.Kxe5Sonnet
1. Observe Halbzug 59, Weiss am Zug. Phase: Endspiel. Schwarz +6 Punkte. Legale Zuege: 4. Schach! Criticality: 0.45.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Escape the g6-pawn check (4 legal moves only). Priority: king moves to a square that maximizes queenside reach or central control. Push the a4 outside passed pawn as the only real counterplay — it forces …
- llm.plan104310ms · $0.0860
full reasoning
Phase: endgame. Escape the g6-pawn check (4 legal moves only). Priority: king moves to a square that maximizes queenside reach or central control. Push the a4 outside passed pawn as the only real counterplay — it forces Black's rook to choose between attacking or chasing the pawn. The g2/h2 pawns are a secondary distraction threat on the kingside. Use the a4 outside passed pawn as a decoy to divert Black's rook away from the kingside, mirroring the Philidor principle of forcing the defending piece to a passive square, while the king races toward the a-pawn to escort it; if Black's rook becomes fully committed to the a-file, the g/h pawns may create a secondary promotion threat. Critical: White is in check — the g6 Black pawn attacks f5, leaving only 4 escape squares; tempo is critical; Black's rook on h8 will activate to the e-file or 8th rank immediately after check resolution — the Lucena bridging technique warns that an active rook cuts off the enemy king decisively; The a4 pawn is White's sole winning insurance; any king move that delays queenside advance by 2+ tempi likely loses to Black's connected e5/c6/g6 pawn mass; Black king on f7 controls e6 and f6, restricting White king re-entry to central ranks via those files.
6. Candidates Candidates: Kxe5 (Captures e5 pawn (material gain), centralizes king toward d4-c5-b5 escort path for the a4 outside passer — Philidor principle: force rook passivity.) | Ke4 (Safe central retreat avoiding rook checks on …
- chess.js.legal_moves0ms
- llm.candidates49416ms · $0.0389
full reasoning
Candidates: Kxe5 (Captures e5 pawn (material gain), centralizes king toward d4-c5-b5 escort path for the a4 outside passer — Philidor principle: force rook passivity.) | Ke4 (Safe central retreat avoiding rook checks on e-file; king heads d3-c3-b4 toward a4 pawn escort without conceding tempo to Re8+.) | Kg5 (Creates secondary kingside threat on g6/h7 pawns, forcing Black's rook to choose between a-pawn chase and kingside defense — dual threat principle.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxe5 — Captures e5 pawn (material gain), plants king on e5 — the ideal d4-c5-b5 escort path for the a4 outside passer. After Re8+ Kd4 sidesteps the e-file; White's king and a4 pawn coordination is then decisi…
- llm.reflect82923ms · $0.0703
full reasoning
Final pick: Kxe5 — Captures e5 pawn (material gain), plants king on e5 — the ideal d4-c5-b5 escort path for the a4 outside passer. After Re8+ Kd4 sidesteps the e-file; White's king and a4 pawn coordination is then decisive.. Rejected: f5e4, f5g5.
9. Commit Commit Kxe5 (f5e5).
60...Ra8Sonnet
1. Observe Halbzug 60, Schwarz am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 16. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng417ms · fail
5. Plan Phase: endgame. Activate rook immediately to the a-file — per Tarrasch's Rule (chessmood.com research: 'rooks belong behind passed pawns') the rook must control the a-file to neutralize a4; hold Black king on f7 to block…
- llm.plan85401ms · $0.0588
full reasoning
Phase: endgame. Activate rook immediately to the a-file — per Tarrasch's Rule (chessmood.com research: 'rooks belong behind passed pawns') the rook must control the a-file to neutralize a4; hold Black king on f7 to block Kf6; once a4 is frozen, swing rook to g2/h2 to harvest White's kingside pawns Convert the rook advantage by using king-cutoff technique (search finding: 'cut the king off with the rook when king is multiple files away') to restrict Ke5 while Black's g6/h7 pawns become an unstoppable force with rook escort Critical: White Ke5 threatens Kd6 attacking c6 — Black king must maintain f7 proximity to c6 corridor; White a4 pawn advances freely to a7 if rook stays passive on h8 — no useful web result on this exact pawn count, falling back to general Tarrasch principle; Black rook on h8 is completely idle — Ra8 or Rh5-Ra5 re-routing is priority one.
6. Candidates Candidates: Ra8 (Tarrasch's Rule: rook behind passed pawn freezes a4 immediately, activating idle h8 rook per plan.) | Re8+ (Check displaces Ke5, gains tempo before Ra8; prevents immediate Kd6 threatening c6.) | Ke7 (Kin…
- chess.js.legal_moves0ms
- llm.candidates30764ms · $0.0254
full reasoning
Candidates: Ra8 (Tarrasch's Rule: rook behind passed pawn freezes a4 immediately, activating idle h8 rook per plan.) | Re8+ (Check displaces Ke5, gains tempo before Ra8; prevents immediate Kd6 threatening c6.) | Ke7 (King to e7 guards c6 against Kd6 threat while freeing rook for a-file activation.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ra8 — Directly stops a4-a5-a6 queening run per Tarrasch's Rule — rook on a8 freezes White's only winning asset immediately, activating the idle rook without granting White any counterplay.. Rejected: h8e8, f7…
- llm.reflect40309ms · $0.0285
full reasoning
Final pick: Ra8 — Directly stops a4-a5-a6 queening run per Tarrasch's Rule — rook on a8 freezes White's only winning asset immediately, activating the idle rook without granting White any counterplay.. Rejected: h8e8, f7e7.
9. Commit Commit Ra8 (h8a8).
61.Kd6Sonnet
1. Observe Halbzug 61, Weiss am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 9. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search17ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Advance a4–a5 to activate the outside passed pawn while marching the king toward d6–c7–b7 to escort it; Black's Ra8 is already on the promotion square and must be dislodged — pressure it with king approac…
- llm.plan48798ms · $0.0353
full reasoning
Phase: endgame. Advance a4–a5 to activate the outside passed pawn while marching the king toward d6–c7–b7 to escort it; Black's Ra8 is already on the promotion square and must be dislodged — pressure it with king approach and pawn tempo so the rook is forced to either leave a8 or surrender rank control Drive the a-pawn to a7 under king escort (via d6–c7–b7) to create a Lucena-like promotion threat; if Black's rook abandons a8 to give checks, use the g2/h2 pawns as decoys on the kingside to split Black's defensive attention and make the rook work on two fronts simultaneously Critical: Ra8 sits directly on the promotion square — White cannot queen without displacing it; Black king on f7 is only 5 moves from b4–a5 to cut off the a-pawn race; king march must begin immediately; g6 pawn controls f5, funneling White king via d6 not f-file; Philidor memory hit confirms rook passivity is key — if Ra8 stays on a-file, king approach to b7 wins the tempo war; g2/h2 pawns serve as secondary threats to prevent Black king from purely chasing the a-pawn without cost.
6. Candidates Candidates: Kd6 (Begins mandatory king march via c7-b7 to escort a-pawn; heuristic Kd6 confirmed, tempo war starts now.) | a5 (Activates the outside passed pawn immediately, forcing Ra8 to stay passive on promotion squar…
- chess.js.legal_moves0ms
- llm.candidates20899ms · $0.0154
full reasoning
Candidates: Kd6 (Begins mandatory king march via c7-b7 to escort a-pawn; heuristic Kd6 confirmed, tempo war starts now.) | a5 (Activates the outside passed pawn immediately, forcing Ra8 to stay passive on promotion square.) | Kd4 (Heuristic Kd4 offers alternate king route c5-b5; keeps pawn advance flexible before committing path.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd6 — King must march d6-c7-b7 immediately; Ra8 is passive on promotion square (Philidor heuristic), so tempo war favors White. Delaying lets Black activate the rook via Ra6 behind the pawn.. Rejected: a4a5, …
- llm.reflect49967ms · $0.0409
full reasoning
Final pick: Kd6 — King must march d6-c7-b7 immediately; Ra8 is passive on promotion square (Philidor heuristic), so tempo war favors White. Delaying lets Black activate the rook via Ra6 behind the pawn.. Rejected: a4a5, e5d4.
9. Commit Commit Kd6 (e5d6).
62...Rd8+Sonnet
1. Observe Halbzug 62, Schwarz am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 20. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng404ms · fail
5. Plan Phase: endgame. Halbzug 62, Schwarz am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 20. Criticality: 0.00. No memory context available. Plan: activate the king, create passed pawns, defend prophylactically. [LL…
full reasoning
Phase: endgame. Halbzug 62, Schwarz am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 20. Criticality: 0.00. No memory context available. Plan: activate the king, create passed pawns, defend prophylactically. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Rd8+ (Checks White King off dominant d6 square, gaining tempo and freeing c6; per chessstrategyonline 'active checks cut off the enemy king decisively'.) | Rxa4 (Captures White's sole passed pawn; eliminates …
- chess.js.legal_moves0ms
- llm.candidates82141ms · $0.0546
full reasoning
Candidates: Rd8+ (Checks White King off dominant d6 square, gaining tempo and freeing c6; per chessstrategyonline 'active checks cut off the enemy king decisively'.) | Rxa4 (Captures White's sole passed pawn; eliminates long-term promotion threat per principle 'rook behind passed pawns maximizes control'.) | Rc8 (Prophylactic defense of c6 pawn against Kxc6; fits plan 'defend prophylactically' while keeping Rook active on open c-file.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rd8+ — Forces White King off d6 immediately; after Kc7 or Ke7, Black plays Rxa4 safely — White's King is too far to recapture c6. Gains tempo AND eliminates a4 pawn in one sequence.. Rejected: a8a4, a8c8.
- llm.reflect41309ms · $0.0302
9. Commit Commit Rd8+ (a8d8).
63.Kc7Sonnet
1. Observe Halbzug 63, Weiss am Zug. Phase: Endspiel. Schwarz +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-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Escape Rd8 check by vacating the d-file, then immediately advance a4–a5 before Black's rook can establish the Philidor defensive posture (rook on 3rd rank); king targets c7–b7 to escort the a-pawn toward …
- llm.plan65761ms · $0.0507
full reasoning
Phase: endgame. Escape Rd8 check by vacating the d-file, then immediately advance a4–a5 before Black's rook can establish the Philidor defensive posture (rook on 3rd rank); king targets c7–b7 to escort the a-pawn toward promotion Build a Lucena-like position by marching the a-pawn to a7 under king escort on b7, forcing Black's rook off the back rank while the g2/h2 kingside pawns create a secondary distraction that splits the rook's defensive workload. Critical: Rd8 gives check on the d-file — king must move immediately, with Kc7 and Kxc6 as primary candidates preserving queenside escort lanes; Black must not be allowed to stabilize the rook on the 3rd rank (Philidor technique) — a-pawn must reach a6 before that setup forms; Kxc6 wins the c6 pawn but may trigger a rook-check storm exposing the king; Kc7 maintains plan continuity at lower risk.
6. Candidates Candidates: Kc7 (Escapes Rd8+ check, places king on c7→b7 escort lane for a-pawn march; plan's primary low-risk candidate.) | Kxc6 (Wins c6 pawn while escaping check; heuristic top pick, though Philidor rook-storm risk n…
- chess.js.legal_moves0ms
- llm.candidates58280ms · $0.0528
full reasoning
Candidates: Kc7 (Escapes Rd8+ check, places king on c7→b7 escort lane for a-pawn march; plan's primary low-risk candidate.) | Kxc6 (Wins c6 pawn while escaping check; heuristic top pick, though Philidor rook-storm risk noted in plan.) | Kc5 (Escapes check, keeps king on queenside near a-pawn without triggering rook-check storm from Kxc6.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kc7 — Escapes check and lands on c7 — exactly one tempo from Kb7 escort position. Black's rook cannot re-check immediately; White advances a5 before Black's rook can reach the 3rd rank for Philidor. Lowest-ri…
- llm.reflect42273ms · $0.0368
full reasoning
Final pick: Kc7 — Escapes check and lands on c7 — exactly one tempo from Kb7 escort position. Black's rook cannot re-check immediately; White advances a5 before Black's rook can reach the 3rd rank for Philidor. Lowest-risk line to Lucena build.. Rejected: d6c6, d6c5.
9. Commit Commit Kc7 (d6c7).
64...Rd7+Sonnet
1. Observe Halbzug 64, Schwarz am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 25. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng595ms · fail
5. Plan Phase: endgame. Drive White's exposed king off c7 with a rook check (Rd7+), then centralize Black's king to e6/d6 to guard c6, and create a second front with g5-h5 kingside pawn advances to overwhelm White's three lone p…
- llm.plan85274ms · $0.0512
full reasoning
Phase: endgame. Drive White's exposed king off c7 with a rook check (Rd7+), then centralize Black's king to e6/d6 to guard c6, and create a second front with g5-h5 kingside pawn advances to overwhelm White's three lone pawns Convert the rook material advantage by using rook checks to evict White's intrusive king, coordinate rook and king to attack White's a4 and kingside pawns, and march connected passed pawns to promotion Critical: White king on c7 threatens immediate Kxc6 — rook check is urgent; White a4 pawn must be monitored to prevent a surprise passed-pawn race; Black rook belongs on d7 (7th rank) to simultaneously attack g2/h2 and restrict White king — according to cited Chess.com 7th-rank principle.
6. Candidates Candidates: Rd7+ (Check drives White king off c7, preventing Kxc6 and establishing dominant 7th-rank rook per Chess.com principle.) | Ke6 (Centralizes Black king to guard c6 pawn and support passed pawn advances, standar…
- chess.js.legal_moves0ms
- llm.candidates9029ms · $0.0036
full reasoning
Candidates: Rd7+ (Check drives White king off c7, preventing Kxc6 and establishing dominant 7th-rank rook per Chess.com principle.) | Ke6 (Centralizes Black king to guard c6 pawn and support passed pawn advances, standard endgame king activation.) | g5 (Creates kingside passed pawn majority to open second front, overwhelming White's lone pawns per cited plan.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rd7+ — White king on c7 threatens Kxc6 immediately. Rd7+ is the only move that forces king away before it captures, while simultaneously landing the rook on the dominant 7th rank to attack g2/h2 and restrict …
- llm.reflect15140ms · $0.0105
full reasoning
Final pick: Rd7+ — White king on c7 threatens Kxc6 immediately. Rd7+ is the only move that forces king away before it captures, while simultaneously landing the rook on the dominant 7th rank to attack g2/h2 and restrict White.. Rejected: f7e6, g6g5.
9. Commit Commit Rd7+ (d8d7).
65.Kxd7Sonnet
1. Observe Halbzug 65, Weiss am Zug. Phase: Endspiel. Schwarz +5 Punkte. Legale Zuege: 5. Schach! Criticality: 0.45.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Resolve check by evaluating whether the rook on d7 is legally capturable (Black king on f7 cannot reach d7 in one move, no other Black piece defends d7); if capturable, eliminate the rook outright to end …
- llm.plan112989ms · $0.0941
full reasoning
Phase: endgame. Resolve check by evaluating whether the rook on d7 is legally capturable (Black king on f7 cannot reach d7 in one move, no other Black piece defends d7); if capturable, eliminate the rook outright to end all rook-based resistance; otherwise retreat king to the square that best preserves a-pawn escort priority on the queenside Capture the unprotected rook to instantly remove Black's Philidor and Lucena defensive resources before they can be established, then apply king-opposition technique to escort the passed a-pawn from a4 to promotion while White's g2/h2 pawns tie down Black's king on the kingside Critical: check must be resolved this move — 5 legal king moves exist, one of which may be a rook capture on d7; the rook on d7 appears unprotected: Black king (f7) is two files distant and cannot guard d7; no pawn or other Black piece defends d7 either — king capture would be decisive; capturing eliminates any Philidor setup (rook-on-3rd-rank defense) and any Lucena bridge-building resource Black could deploy — removing both heuristic threats in a single move; after rook elimination, White enters K+3P vs K+3P with a passed a-pawn; opposition principle decides: White king centralised on d7 is ideally placed to march toward b6 and escort a4–a5–a6–a7–a8; fallback if rook capture unavailable: king retreat to c6 (removes Black pawn, opens escort lane) is preferred over passive retreats to b8 or c8 which surrender queenside tempo.
6. Candidates Candidates: Kxd7 (Captures unprotected rook instantly, eliminating Philidor and Lucena resources; Black king on f7 cannot recapture; decisive material gain.) | Kxc6 (Fallback: removes Black's c6 pawn and opens escort lan…
- chess.js.legal_moves0ms
- llm.candidates32768ms · $0.0226
full reasoning
Candidates: Kxd7 (Captures unprotected rook instantly, eliminating Philidor and Lucena resources; Black king on f7 cannot recapture; decisive material gain.) | Kxc6 (Fallback: removes Black's c6 pawn and opens escort lane for a4-pawn march, though Black's rook survives.) | Kb6 (Escapes check and king advances toward a4-pawn escort, applying queenside tempo pressure while rook stays active.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxd7 — Black king on f7 cannot recapture on d7 (two files away). Eliminating the rook removes all Philidor and Lucena defensive resources instantly, leaving K+3P vs K+3P with White's passed a-pawn dominant.. …
- llm.reflect9884ms · $0.0028
full reasoning
Final pick: Kxd7 — Black king on f7 cannot recapture on d7 (two files away). Eliminating the rook removes all Philidor and Lucena defensive resources instantly, leaving K+3P vs K+3P with White's passed a-pawn dominant.. Rejected: c7c6, c7b6.
9. Commit Commit Kxd7 (c7d7).
66...Kf8Sonnet
1. Observe Halbzug 66, Schwarz am Zug. Phase: Endspiel. Material gleich. Legale Zuege: 8. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng386ms · fail
5. Plan Phase: endgame. Halbzug 66, Schwarz am Zug. Phase: Endspiel. Material gleich. Legale Zuege: 8. Criticality: 0.15. No memory context available. Plan: activate the king, create passed pawns, defend prophylactically. [LLM-E…
full reasoning
Phase: endgame. Halbzug 66, Schwarz am Zug. Phase: Endspiel. Material gleich. Legale Zuege: 8. Criticality: 0.15. No memory context available. Plan: activate the king, create passed pawns, defend prophylactically. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Kf8 (development score=0) | Kg8 (development score=0) | Kg7 (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: Kf8 — development score=0. Rejected: f7g8, f7g7. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Kf8 (f7f8).
67.Kxc6Sonnet
1. Observe Halbzug 67, Weiss am Zug. Phase: Endspiel. Material gleich. Legale Zuege: 11. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-sonnet-control (tag=chess-sonnet-control) — mandatory run documented.
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Capture the undefended c6 pawn immediately with the king (Kxc6), eliminating Black's only queenside resource, then escort the a4 pawn toward promotion over the next 4–5 moves while Black king cannot reach…
- llm.plan43313ms · $0.0262
full reasoning
Phase: endgame. Capture the undefended c6 pawn immediately with the king (Kxc6), eliminating Black's only queenside resource, then escort the a4 pawn toward promotion over the next 4–5 moves while Black king cannot reach the queenside in time to interfere. Trade the advanced king position for material (c6 pawn capture) to create a decisive passed a-pawn on an open file, then use king-opposition technique to shepherd a4–a5–a6–a7–a8=Q while White's g2/h2 kingside pawns act as a second front to dilute Black's defensive resources. Critical: c6 pawn is hanging — White king on d7 attacks it directly, Black king on f8 cannot defend in one move (f8→e7→d6 is two moves minimum); After Kxc6, Black king needs ~5 moves to reach b7/c7 defensive squares; White a-pawn needs only 4 moves to promote — timing favors White decisively; Black's g6/h7 pawns are irrelevant to the queenside race; White's g2/h2 create a secondary promotion threat that further dilutes Black king's defensive capacity.
6. Candidates Candidates: Kxc6 (Captures the hanging c6 pawn immediately; Black king on f8 needs 5 moves to reach b7, a-pawn needs only 4 to promote.) | a5 (Direct pawn advance creates immediate promotion race; active piece play via p…
- chess.js.legal_moves0ms
- llm.candidates20852ms · $0.0135
full reasoning
Candidates: Kxc6 (Captures the hanging c6 pawn immediately; Black king on f8 needs 5 moves to reach b7, a-pawn needs only 4 to promote.) | a5 (Direct pawn advance creates immediate promotion race; active piece play via pawn momentum forces Black king into reactive defense.) | Kc7 (King centralizes to c7, threatening Kxc6 next while controlling b6/b7 squares to shield the a-pawn's march.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxc6 — Captures the hanging c6 pawn immediately, removing Black's only queenside counterplay. Black king on f8 needs 5 moves to reach b7; White a4 promotes in 4 moves (a5-a6-a7-a8=Q). Timing is decisive.. Rej…
- llm.reflect8914ms · $0.0031
full reasoning
Final pick: Kxc6 — Captures the hanging c6 pawn immediately, removing Black's only queenside counterplay. Black king on f8 needs 5 moves to reach b7; White a4 promotes in 4 moves (a5-a6-a7-a8=Q). Timing is decisive.. Rejected: a4a5, d7c7.
9. Commit Commit Kxc6 (d7c6).
68...Ke7Sonnet
1. Observe Halbzug 68, Schwarz am Zug. Phase: Endspiel. Weiss +1 Punkte. Legale Zuege: 8. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall_position disabled for this agent (tool_config.memory_recall=false).
3. Recall Opponent recall_opponent disabled for this agent (tool_config.memory_recall=false).
4. Research Web search returned no SearXNG results (empty).
- web_search.searxng603ms · fail
5. Plan Phase: endgame. Activate the Black King toward e7/d7 while launching the g6-g5 and h7-h5 pawn advance to create a kingside passed pawn race — forcing White to split attention between supporting the a-pawn and stopping Bl…
- llm.plan90370ms · $0.0548
full reasoning
Phase: endgame. Activate the Black King toward e7/d7 while launching the g6-g5 and h7-h5 pawn advance to create a kingside passed pawn race — forcing White to split attention between supporting the a-pawn and stopping Black's counter-pawns. Black's only realistic saving resource is converting the g+h majority into a connected passed pawn pair fast enough to create a race against White's a-pawn, since the Black King alone cannot reach the queenside in time to stop it. Critical: White King on c6 is 2 moves from b5-a6, after which the a-pawn marches freely — Black's King is 5+ tempi away from intercepting; Black's g6 and h7 pawns are not yet passed; g5 and h5 must be pushed urgently to change that; White's g2/h2 pawn pair is a latent second front — if Black's King rushes queenside, White can advance h4-g4 and create a second passer.
6. Candidates Candidates: Ke7 (Centralizes King toward e7/d7 as planned; covers both queenside interception and supports g5/h5 advance simultaneously.) | g5 (Urgently launches the kingside pawn majority race; forces White to split att…
- chess.js.legal_moves0ms
- llm.candidates76403ms · $0.0247
full reasoning
Candidates: Ke7 (Centralizes King toward e7/d7 as planned; covers both queenside interception and supports g5/h5 advance simultaneously.) | g5 (Urgently launches the kingside pawn majority race; forces White to split attention between a-pawn and stopping g5-g4.) | h5 (Second pawn advance to create connected passed pair on g+h files; per plan g5/h5 must be pushed before White a-pawn escapes.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke7 — Centralizes King toward e7/d7 as planned; covers both queenside interception and supports g5/h5 advance simultaneously.. Rejected: g6g5, h7h5. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Ke7 (f8e7).