OpusvsHaiku
Halbzuege (25)
1.e4Opus
1. Observe Halbzug 1, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 20. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 12 similar position(s) found (limit=15).
- nex_search9ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Seize a full central pawn on e4, then develop knights toward f3/c3 and prepare short castling by move 5-6 without premature pawn or queen moves. Build a classical central majority and rapid piece developm…
- llm.plan13859ms · $0.0400
full reasoning
Phase: opening. Seize a full central pawn on e4, then develop knights toward f3/c3 and prepare short castling by move 5-6 without premature pawn or queen moves. Build a classical central majority and rapid piece development to convert White's first-move initiative into a lasting space and tempo edge, steering toward an open Italian/Ruy structure where my pieces hit f7 and the e5/d5 squares. Critical: Black may answer asymmetrically (Sicilian 1...c5) or solidly (Caro-Kann/French) — I must not overextend the center and invite a c5/d5 break; own e4 pawn becomes a target if I delay Nf3 and castling; avoid the anti-pattern of flank pawn moves (g4/f4/h4) before the king is safe.
6. Candidates Candidates: e4 (Seizes full center, opens lines for bishop and queen, directly enacts the classical development plan toward Italian/Ruy structures.) | d4 (Equally strong central grab, supported by queen, leads to solid c…
- chess.js.legal_moves0ms
- llm.candidates9443ms · $0.0217
full reasoning
Candidates: e4 (Seizes full center, opens lines for bishop and queen, directly enacts the classical development plan toward Italian/Ruy structures.) | d4 (Equally strong central grab, supported by queen, leads to solid closed/queen's-pawn structures with lasting space edge.) | Nf3 (Flexible developing move controlling e5, prepares castling, avoids early central commitment while keeping initiative.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e4 — Matches the stated opening plan exactly: full central occupation, immediate diagonals for Bf1 and Qd1, fastest route to Italian/Ruy setups hitting f7 with rapid Nf3 and short castling.. Rejected: d2d4, g…
- llm.reflect8006ms · $0.0179
full reasoning
Final pick: e4 — Matches the stated opening plan exactly: full central occupation, immediate diagonals for Bf1 and Qd1, fastest route to Italian/Ruy setups hitting f7 with rapid Nf3 and short castling.. Rejected: d2d4, g1f3.
9. Commit Commit e4 (e2e4).
2...d5Haiku
1. Observe Halbzug 2, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 20. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent No pattern found for chess-opus-tm (tag=chess-opus-tm) — mandatory run documented.
- nex_entity_search10ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Challenge White's e4 center control through e5 or d5 response. Rapidly develop knights to f6/c6 per opening principle. Avoid early queen development. Equalize material and position while preparing active …
- llm.plan19885ms · $0.0077
full reasoning
Phase: opening. Challenge White's e4 center control through e5 or d5 response. Rapidly develop knights to f6/c6 per opening principle. Avoid early queen development. Equalize material and position while preparing active piece coordination in the middlegame. Contest White's central space advantage by controlling key squares (d4/d5) and developing pieces with tempo before White establishes a dominant center. Critical: White's e4 controls d5 and f5, restricting Black's central options; Black must develop knights first to maintain piece activity parity; White threatens d4 push—Black must respond decisively to prevent strong pawn center.
6. Candidates Candidates: d5 (Direct challenge to e4. Controls d4/d5, prevents White's center expansion decisively.) | e5 (Symmetrical center fight. Classical response contesting e4 space, opens piece lines.) | Nf6 (Develops knight wi…
- chess.js.legal_moves0ms
- llm.candidates25760ms · $0.0119
full reasoning
Candidates: d5 (Direct challenge to e4. Controls d4/d5, prevents White's center expansion decisively.) | e5 (Symmetrical center fight. Classical response contesting e4 space, opens piece lines.) | Nf6 (Develops knight with tempo on d4/e4. Rapid piece development per opening principle.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d5 — Direct challenge to e4; forces White's decision (exd5 or tension). Scandinavian sharpness with 2–3 move tactical complications Haiku can calculate.. Rejected: e7e5, g8f6.
- llm.reflect38296ms · $0.0178
9. Commit Commit d5 (d7d5).
3.exd5Opus
1. Observe Halbzug 3, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 31. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 12 similar position(s) found (limit=15).
- nex_search11ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search11ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Capture on d5 immediately. This is the Scandinavian (1.e4 d5) — taking wins the center pawn and, after the near-forced queen recapture, lets me hit her majesty with Nc3 for a free tempo, then build a broa…
- llm.plan18727ms · $0.0609
full reasoning
Phase: opening. Capture on d5 immediately. This is the Scandinavian (1.e4 d5) — taking wins the center pawn and, after the near-forced queen recapture, lets me hit her majesty with Nc3 for a free tempo, then build a broad center with d4 and rapid development. Exploit Black's premature queen exposure: gain tempi on the recapturing queen with Nc3, erect a full d4/e-file center, develop with Nf3-Bc4-Bd2 and castle queenside for a lasting space and development lead. Critical: Black recaptures 2...Qxd5 inviting tempo gain with Nc3 — memory 'queen late' now favors ME, punishing Black's early queen; alternative 2...Nf6 (Scandinavian gambit) — I should hold the pawn calmly with c4/Nf3, not cling greedily; central control (e4/d4 squares) is the one thing this position is about: convert the won pawn-recapture into a real center, not a static extra pawn; avoid the anti-pattern of premature flank/queen moves — develop knights before bishops, castle by move 6-8; do not overextend chasing material; if Black gambits, return to development rather than grabbing a second pawn.
6. Candidates Candidates: exd5 (Captures the central pawn; after Qxd5 Nc3 gains a tempo on the exposed queen, the plan's core idea.) | Nc3 (Develops a knight, defends e4 and pressures d5; keeps central tension while accelerating devel…
- chess.js.legal_moves0ms
- llm.candidates7905ms · $0.0210
full reasoning
Candidates: exd5 (Captures the central pawn; after Qxd5 Nc3 gains a tempo on the exposed queen, the plan's core idea.) | Nc3 (Develops a knight, defends e4 and pressures d5; keeps central tension while accelerating development per plan.) | e5 (Advances and gains space, closing the center; less critical than capturing but stakes a central claim.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: exd5 — Wins the central pawn outright; after the forced 2...Qxd5, Nc3 hits the queen with tempo, building a d4 center with a development lead — punishing Black's premature queen exposure exactly as memory 'qu…
- llm.reflect8849ms · $0.0198
full reasoning
Final pick: exd5 — Wins the central pawn outright; after the forced 2...Qxd5, Nc3 hits the queen with tempo, building a d4 center with a development lead — punishing Black's premature queen exposure exactly as memory 'queen late favors me' predicts.. Rejected: b1c3, e4e5.
9. Commit Commit exd5 (e4d5).
4...Nf6Haiku
1. Observe Halbzug 4, Schwarz am Zug. Phase: Eroeffnung. Weiss +1 Punkte. Legale Zuege: 28. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-opus-tm (tag=chess-opus-tm) — mandatory run documented.
- nex_entity_search13ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Develop Nf6 to threaten d5 and contest central squares. Reclaim material parity through piece activity, not queen development. Sequence: Nf6, then c6/e6 to support d5 fight. Equalize material via coordina…
- llm.plan33718ms · $0.0156
full reasoning
Phase: opening. Develop Nf6 to threaten d5 and contest central squares. Reclaim material parity through piece activity, not queen development. Sequence: Nf6, then c6/e6 to support d5 fight. Equalize material via coordinated piece development (Nc6, Bf5/Bg4, supported d5 challenge), establish middlegame with active knights and central control before White consolidates space advantage. Critical: White's d5 pawn is advanced (must be challenged or contained); Black's Nf6 is forcing—threatens d5, follows knight-before-bishop rule, avoids premature queen exposure; White likely pushes d6 or defends with c4/Nc3 next—Black must respond with tempo-gaining moves (c6, e6, Nc6).
6. Candidates Candidates: Nf6 (Threatens d5 directly, develops with forcing tempo, contests central squares per strategic plan) | e5 (Advances center control, contests White's space advantage, supports piece coordination and positiona…
- chess.js.legal_moves0ms
- llm.candidates89005ms · $0.0550
full reasoning
Candidates: Nf6 (Threatens d5 directly, develops with forcing tempo, contests central squares per strategic plan) | e5 (Advances center control, contests White's space advantage, supports piece coordination and positional strategy) | Nc6 (Develops knight with central support, enables d5 challenge coordination, maximizes Black's piece activity)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf6 — Directly threatens d5 with forcing tempo, develops a piece, and contests the advanced pawn. White must respond, giving Black the initiative.. Rejected: e7e5, b8c6.
- llm.reflect18212ms · $0.0059
9. Commit Commit Nf6 (g8f6).
5.c4Opus
1. Observe Halbzug 5, Weiss am Zug. Phase: Eroeffnung. Weiss +1 Punkte. Legale Zuege: 30. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 12 similar position(s) found (limit=15).
- nex_search11ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Buttress the extra d5-pawn and the space it grants by erecting a broad pawn front, then develop minor pieces rapidly and castle, converting the pawn-plus into a durable central clamp rather than rushing t…
- llm.plan18237ms · $0.0544
full reasoning
Phase: opening. Buttress the extra d5-pawn and the space it grants by erecting a broad pawn front, then develop minor pieces rapidly and castle, converting the pawn-plus into a durable central clamp rather than rushing to hold material greedily. Per memory 'central control' and 'limited pawn moves', anchor a d4-supported center, finish development knights-before-bishops, castle early ('castle early'), and use my extra space to restrict Black's pieces while she spends tempi trying to regain the pawn. Critical: Black (memory 'queen late' still favors me — her queen and minor pieces must chase the d5-pawn, costing time) will pressure d5 via ...Nxd5 or ...e6/...c6 breaks; my own risk is overextending the front pawns and leaving holes if I push too far without development; If I cling to material with a loose extra pawn I invite tempo-gaining hits — keep development ahead of greed; Avoid premature flank/pawn moves before castling (memory 'kingside before castle' / 'limited pawn moves').6. Candidates Candidates: c4 (Buttresses the extra d5-pawn with a broad pawn front, claims space, and supports a later e4 central clamp per the plan.) | Nf3 (Knights-before-bishops development controlling e5, preparing rapid kingside …
- chess.js.legal_moves0ms
- llm.candidates14377ms · $0.0387
full reasoning
Candidates: c4 (Buttresses the extra d5-pawn with a broad pawn front, claims space, and supports a later e4 central clamp per the plan.) | Nf3 (Knights-before-bishops development controlling e5, preparing rapid kingside castling per 'castle early' memory while keeping the front intact.) | d4 (Anchors a broad supported center, restricting Black's pieces and reinforcing the space advantage that the extra d5-pawn grants.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c4 — Black's Nf6 attacks d5; c4 directly defends the extra pawn while seizing a broad Queen's-Gambit center, converting the material plus into a durable space clamp per the 'central control' plan.. Rejected: …
- llm.reflect13961ms · $0.0414
full reasoning
Final pick: c4 — Black's Nf6 attacks d5; c4 directly defends the extra pawn while seizing a broad Queen's-Gambit center, converting the material plus into a durable space clamp per the 'central control' plan.. Rejected: g1f3, d2d4.
9. Commit Commit c4 (c2c4).
6...Nc6Haiku
1. Observe Halbzug 6, Schwarz am Zug. Phase: Eroeffnung. Weiss +1 Punkte. Legale Zuege: 31. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent No pattern found for chess-opus-tm (tag=chess-opus-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Challenge d5 via c6 or e6 support while developing Nc6 and Bf5/Bg4. Coordinate piece activity to neutralize White's space before d5 becomes entrenched. Avoid queen development. Prepare kingside castling. …
- llm.plan23254ms · $0.0097
full reasoning
Phase: opening. Challenge d5 via c6 or e6 support while developing Nc6 and Bf5/Bg4. Coordinate piece activity to neutralize White's space before d5 becomes entrenched. Avoid queen development. Prepare kingside castling. Equalize through rapid piece development while White remains undeveloped; Black's Nf6 forcing pressure and coordinated knight/bishop deployment offset White's d5 space advantage. Critical: White's d5 pawn is structurally advanced—must be challenged immediately via c6/e6 support or it becomes a lasting anchor; Black's Nf6 is the sole forcing piece—threatens d5, controls key central squares, buys tempo for development; White's next move (Nf3, Nc3, e3, or d6) determines whether d5 solidifies or becomes exploitable; Queen development must be delayed (heuristic: queens move 6-7+)—premature Qa5/Qd8 loses tempo to White's pawn cover; Kingside castling is non-negotiable before middlegame—keeps king safe while maintaining piece activity.
6. Candidates Candidates: Nc6 (Directly challenges d5 with developed knight, forces White response, aligns with coordinated piece strategy.) | e6 (Flexible support structure preparing c5 attack on d5, opens e-file for kingside castlin…
- chess.js.legal_moves0ms
- llm.candidates72265ms · $0.0422
full reasoning
Candidates: Nc6 (Directly challenges d5 with developed knight, forces White response, aligns with coordinated piece strategy.) | e6 (Flexible support structure preparing c5 attack on d5, opens e-file for kingside castling, solid pawn base.) | Bf5 (Active bishop development controlling e4/c2, complements Nc6 pressure on d5, supports coordinated piece attack.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nc6 — Directly attacks d5, forces White's response immediately. Develops with tempo. Classical Slav response—Haiku plays forcing moves, not passive waits.. Rejected: e7e6, c8f5.
- llm.reflect23268ms · $0.0079
9. Commit Commit Nc6 (b8c6).
7.Nf3Opus
1. Observe Halbzug 7, Weiss am Zug. Phase: Eroeffnung. Weiss +1 Punkte. Legale Zuege: 30. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 12 similar position(s) found (limit=15).
- nex_search8ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Cement the advanced d5-wedge with e2-e4, building a broad c4-d5-e4 pawn front that throttles Black's pieces, then develop Nf3/Be2 and castle short to convert the extra pawn into a durable spatial clamp. T…
- llm.plan18202ms · $0.0708
full reasoning
Phase: opening. Cement the advanced d5-wedge with e2-e4, building a broad c4-d5-e4 pawn front that throttles Black's pieces, then develop Nf3/Be2 and castle short to convert the extra pawn into a durable spatial clamp. Turn the protected d5 pawn and central space into a permanent bind, finishing development and castling before Black coordinates ...Ne5/...Nb4 and ...e6 breaks to regain material. Critical: Nf6 pressures d5 (held by c4) — must keep it defended before any pawn lever; Black jumps ...Ne5 and ...Nb4 hitting c2/d3 squares and eyeing the wedge; ...e6 break challenging d5 — avoid loosening c4/e4 prematurely (memory 'limited pawn moves', 'castle early').
6. Candidates Candidates: Nf3 (Develops kingside, controls e5 to deny the ...Ne5 jump against the wedge, prepares Be2 and short castling.) | d4 (Builds the broad c4-d4-d5 front, cementing the protected d5 wedge and maximizing the spat…
- chess.js.legal_moves0ms
- llm.candidates15377ms · $0.0582
full reasoning
Candidates: Nf3 (Develops kingside, controls e5 to deny the ...Ne5 jump against the wedge, prepares Be2 and short castling.) | d4 (Builds the broad c4-d4-d5 front, cementing the protected d5 wedge and maximizing the spatial clamp on Black's pieces.) | Nc3 (Develops with tempo, reinforces central control around d5/e4 squares, covers b5 and supports a future clamp.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf3 — Develops a piece toward castling and controls e5, killing the ...Ne5 jump that hits the c4-defender of my d5 wedge. Keeps pawn moves limited and king safety on track.. Rejected: d2d4, b1c3.
- llm.reflect20383ms · $0.0438
9. Commit Commit Nf3 (g1f3).
8...Bf5Haiku
1. Observe Halbzug 8, Schwarz am Zug. Phase: Eroeffnung. Weiss +1 Punkte. Legale Zuege: 32. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-opus-tm (tag=chess-opus-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Challenge d5 pawn via e6 or d6 support. Develop dark-squared bishop (Bf5 attacking queen, or Bg4 pinning Nf3). Coordinate Nc6-Nf6 to create tactical pressure. Convert piece activity into positional equali…
- llm.plan35705ms · $0.0171
full reasoning
Phase: opening. Challenge d5 pawn via e6 or d6 support. Develop dark-squared bishop (Bf5 attacking queen, or Bg4 pinning Nf3). Coordinate Nc6-Nf6 to create tactical pressure. Convert piece activity into positional equality by offsetting White's d5 space advantage through coordinated knight-bishop threats and forcing White to respond tactically. Critical: White's d5 pawn dominates space but lacks support—vulnerable to e6/d6 plus knight-bishop coordination; Black's c8-bishop underdeveloped—must engage immediately (Bf5/Bg4 with tempo) to create threats offsetting space deficit; White's Nf3 and queen underdeveloped—Black's e6 or Bf5/Bg4 moves force White to defend before consolidating advantage.
6. Candidates Candidates: Bf5 (Develops dark-squared bishop with tempo, attacks queen, forces White to respond before consolidating space) | Nxd5 (Centralizes knight on premium square, removes dominant d5 pawn, converts space deficit …
- chess.js.legal_moves0ms
- llm.candidates61287ms · $0.0374
full reasoning
Candidates: Bf5 (Develops dark-squared bishop with tempo, attacks queen, forces White to respond before consolidating space) | Nxd5 (Centralizes knight on premium square, removes dominant d5 pawn, converts space deficit into piece activity) | e5 (Challenges White's spatial advantage, opens center lines for piece development and coordination)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bf5 — Develops bishop off the back rank with tempo. Attacks b1 knight, forcing White to address the threat before consolidating. Maintains material equality while improving Black's piece activity.. Rejected: …
- llm.reflect118898ms · $0.0768
full reasoning
Final pick: Bf5 — Develops bishop off the back rank with tempo. Attacks b1 knight, forcing White to address the threat before consolidating. Maintains material equality while improving Black's piece activity.. Rejected: f6d5, e7e5.
9. Commit Commit Bf5 (c8f5).
9.dxc6Opus
1. Observe Halbzug 9, Weiss am Zug. Phase: Eroeffnung. Weiss +1 Punkte. Legale Zuege: 28. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 12 similar position(s) found (limit=15).
- nex_search12ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Play e2-e4 to hit the f5-bishop with tempo while erecting a c4-d5-e4 pawn wall, then develop Be2/Nc3 and castle short to lock in the extra central pawn. Convert the protected passed-style d5 wedge and bro…
- llm.plan17266ms · $0.0493
full reasoning
Phase: opening. Play e2-e4 to hit the f5-bishop with tempo while erecting a c4-d5-e4 pawn wall, then develop Be2/Nc3 and castle short to lock in the extra central pawn. Convert the protected passed-style d5 wedge and broad central space into a permanent positional clamp, finishing development and king safety before Black organizes ...e6 or ...Ne5 counterplay to regain the pawn. Critical: Nf6 pressures d5 (held by c4) — keep it covered before any lever; after e4 Bf5 retreats (Bg6/Bg4); watch ...Nb4 and ...Ne5 hitting c2/d3 weak squares; ...e6 break challenging d5 must be met without loosening the front; own king still uncastled — central files must stay closed (memory: castle early, central control, knights before bishops all apply).
6. Candidates Candidates: dxc6 (Pawn captures the c6-knight; after bxc6 White is up a knight for a pawn. Wins material outright, plan-superseding tactic.) | Nc3 (Solid alternative: adds a second defender to d5 (attacked by both knight…
- chess.js.legal_moves0ms
- llm.candidates45733ms · $0.2259
full reasoning
Candidates: dxc6 (Pawn captures the c6-knight; after bxc6 White is up a knight for a pawn. Wins material outright, plan-superseding tactic.) | Nc3 (Solid alternative: adds a second defender to d5 (attacked by both knights), develops, keeps the central wedge and prepares castling.) | d6 (Advances the wedge into Black's camp, disrupting development; after exd6 the front loosens but keeps initiative. Inferior to dxc6.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: dxc6 — Free piece: the d5 pawn captures Black's undefended c6-knight. After bxc6 White is up a full knight for a pawn — a winning material grab that overrides every positional plan.. Rejected: b1c3, d5d6.
- llm.reflect12870ms · $0.0200
9. Commit Commit dxc6 (d5c6).
10...Qxd2+Haiku
1. Observe Halbzug 10, Schwarz am Zug. Phase: Eroeffnung. Weiss +4 Punkte. Legale Zuege: 38. Criticality: 0.25.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-opus-tm (tag=chess-opus-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Challenge c6 pawn via e6 or d6 with support. Play Bg4 (pins Nf3 with tempo). Develop Nc6 to coordinate Nf6+Bf5+Nc6 into tactical cluster. Force White into reactive consolidation. Exploit weakness of unsup…
- llm.plan25742ms · $0.0122
full reasoning
Phase: opening. Challenge c6 pawn via e6 or d6 with support. Play Bg4 (pins Nf3 with tempo). Develop Nc6 to coordinate Nf6+Bf5+Nc6 into tactical cluster. Force White into reactive consolidation. Exploit weakness of unsupported c6 pawn. Convert space disadvantage into tempo and tactics through coordinated piece pressure, neutralizing White's advanced pawn while safely completing development. Critical: White's c6 pawn is space-dominant but undefended—exploitable via e6/d6 pawn push; Bg4 pins Nf3 and gains tempo; Nf6+Bf5+Nc6 create tactical zone; Black underdeveloped (only Nf6, Bf5)—must develop with threats, not moves.
6. Candidates Candidates: Qxd2+ (Check wins d2 pawn, forces White's response, enables follow-up tactics.) | Bg4 (Pins Nf3 with tempo, gains piece pressure per strategic plan.) | bxc6 (Eliminates dangerous c6 pawn, removes White's spac…
- chess.js.legal_moves0ms
- llm.candidates58242ms · $0.0326
full reasoning
Candidates: Qxd2+ (Check wins d2 pawn, forces White's response, enables follow-up tactics.) | Bg4 (Pins Nf3 with tempo, gains piece pressure per strategic plan.) | bxc6 (Eliminates dangerous c6 pawn, removes White's space advantage.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qxd2+ — Wins the d2 pawn with check, forcing White's king to move. Black gains a clean material advantage and an active Queen. Concrete tactics beat plan.. Rejected: f5g4, b7c6.
- llm.reflect18716ms · $0.0071
9. Commit Commit Qxd2+ (d8d2).
11.Nbxd2Opus
1. Observe Halbzug 11, Weiss am Zug. Phase: Eroeffnung. Weiss +3 Punkte. Legale Zuege: 5. Schach! Criticality: 0.60.
- material-counter0ms
2. Recall Position recall: 12 similar position(s) found (limit=15).
- nex_search7ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Resolve the check by capturing Black's undefended queen on d2 (no black piece guards it), then complete development and castle to convert a decisive material lead. Win the hanging queen for a leftover bis…
- llm.plan20246ms · $0.0669
full reasoning
Phase: opening. Resolve the check by capturing Black's undefended queen on d2 (no black piece guards it), then complete development and castle to convert a decisive material lead. Win the hanging queen for a leftover bishop/knight at most, then finish development (knights before bishops, per the opening heuristic), castle early for king safety, and trade down into a trivially won endgame two-plus pieces ahead. Critical: queen on d2 is undefended — recapture with a developing piece preferred over the king to keep castling rights and central control; after recapture watch ...Bxc2 / loose c2-c4 pawns and the e4/d5 squares; do not grab with the king (Kxd2) — it forfeits castling and exposes the king per the castle-early heuristic.
6. Candidates Candidates: Nbxd2 (Captures the free queen while developing the undeveloped b1-knight; keeps Nf3 active, bishop, and castling rights intact.) | Bxd2 (Wins the queen and develops the c1-bishop, unblocking the back rank; p…
- chess.js.legal_moves0ms
- llm.candidates12492ms · $0.0395
full reasoning
Candidates: Nbxd2 (Captures the free queen while developing the undeveloped b1-knight; keeps Nf3 active, bishop, and castling rights intact.) | Bxd2 (Wins the queen and develops the c1-bishop, unblocking the back rank; preserves both knights and quick kingside castling.) | Qxd2 (Safest recapture; queen takes queen, no tactics, then develop pieces and castle into a winning material lead.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nbxd2 — Wins the undefended queen and simultaneously develops the only untouched piece (b1-knight), per the knights-before-bishops heuristic; keeps the c1-bishop free to choose its diagonal and preserves O-O.…
- llm.reflect12627ms · $0.0297
full reasoning
Final pick: Nbxd2 — Wins the undefended queen and simultaneously develops the only untouched piece (b1-knight), per the knights-before-bishops heuristic; keeps the c1-bishop free to choose its diagonal and preserves O-O.. Rejected: c1d2, d1d2.
9. Commit Commit Nbxd2 (b1d2).
12...Bg4Haiku
1. Observe Halbzug 12, Schwarz am Zug. Phase: Eroeffnung. Weiss +12 Punkte. Legale Zuege: 33. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search18ms
3. Recall Opponent No pattern found for chess-opus-tm (tag=chess-opus-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Pin Nf3 with Bg4 (tempo gain), develop Nc6 attacking the undefended c6 pawn, force White into defensive reactions while completing Black's piece coordination (Nf6-Bf5-Nc6 trio). Black exploits White's ove…
- llm.plan47746ms · $0.0282
full reasoning
Phase: opening. Pin Nf3 with Bg4 (tempo gain), develop Nc6 attacking the undefended c6 pawn, force White into defensive reactions while completing Black's piece coordination (Nf6-Bf5-Nc6 trio). Black exploits White's overextended c6 pawn through coordinated tactical pressure. Bg4 pins, Nc6 attacks, Nf6+Bf5+Nc6 form a lethal piece cluster that forces White to defend passively rather than consolidate space. Critical: c6 pawn is deep but undefended—Nd2 blocks the c-file, cutting off support. Nc6 or e6 hits it directly.; Bg4 pins Nf3 to the queen. White must waste a tempo: h3, Ne1, or Nh4. Black gains initiative.; Nf6+Bf5 already positioned; Nc6 completes the tactical cluster. Three pieces targeting White's weak center.; White's queenside (Bc1, Qd1) unprepared to defend c6. This pawn will collapse under pressure..
6. Candidates Candidates: bxc6 (Removes White's undefended c6 pawn, the main positional pressure point threatening Black's position.) | Bg4 (Pins Nf3 to queen, forces tempo loss (h3/Ne1/Nh4), seizes initiative with tempo.) | Ne4 (Cent…
- chess.js.legal_moves0ms
- llm.candidates24730ms · $0.0127
full reasoning
Candidates: bxc6 (Removes White's undefended c6 pawn, the main positional pressure point threatening Black's position.) | Bg4 (Pins Nf3 to queen, forces tempo loss (h3/Ne1/Nh4), seizes initiative with tempo.) | Ne4 (Centralizes knight to strong square, develops piece with tempo, controls key center squares.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bg4 — Pins Nf3 to queen, forcing tempo loss (h3/Ne1/Nh4). Seizes initiative immediately with forcing tactic.. Rejected: b7c6, f6e4.
- llm.reflect45250ms · $0.0230
9. Commit Commit Bg4 (f5g4).
13.cxb7Opus
1. Observe Halbzug 13, Weiss am Zug. Phase: Eroeffnung. Weiss +12 Punkte. Legale Zuege: 26. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall: 12 similar position(s) found (limit=15).
- nex_search11ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Neutralize the Bg4 pin on f3, finish minor-piece development, and castle to safety while keeping the advanced c6 pawn as a long-term trump. Convert a decisive +12 material lead by completing development, …
- llm.plan15356ms · $0.0501
full reasoning
Phase: opening. Neutralize the Bg4 pin on f3, finish minor-piece development, and castle to safety while keeping the advanced c6 pawn as a long-term trump. Convert a decisive +12 material lead by completing development, castling, and trading pieces into a trivially won endgame supported by the far-advanced c6 passer. Critical: Bg4 pins Nf3 to the d1-queen — relieve it (interpose or challenge the bishop) before it forces ...Bxf3 structural damage; own king still uncastled on e1 per castle-early heuristic — prioritize O-O within 2-3 moves; Black's only activity is the g4-bishop and f6-knight; no concrete threat beyond the pin, so avoid loosening pawn moves (anti g4/f4 before castling) and develop knights-before-bishops to lock in the win.
6. Candidates Candidates: cxb7 (Advanced c6 passer crashes through, hitting the a8-rook; converts the +12 lead into overwhelming material per convert-trump heuristic.) | Be2 (Interposes to relieve the Bg4-Nf3 pin and develops the bish…
- chess.js.legal_moves0ms
- llm.candidates13951ms · $0.0417
full reasoning
Candidates: cxb7 (Advanced c6 passer crashes through, hitting the a8-rook; converts the +12 lead into overwhelming material per convert-trump heuristic.) | Be2 (Interposes to relieve the Bg4-Nf3 pin and develops the bishop, clearing the path to castle within two moves per castle-early heuristic.) | h3 (Challenges the g4-bishop immediately, forcing it to declare; resolves the pin before ...Bxf3 structural damage, though slightly loosens kingside.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: cxb7 — The c6 passer crashes through to b7, attacking the a8-rook and threatening bxa8=Q. Wins a full rook on top of the +12 lead; the Bg4 pin is harmless with no concrete threat this move.. Rejected: f1e2, h…
- llm.reflect11891ms · $0.0268
full reasoning
Final pick: cxb7 — The c6 passer crashes through to b7, attacking the a8-rook and threatening bxa8=Q. Wins a full rook on top of the +12 lead; the Bg4 pin is harmless with no concrete threat this move.. Rejected: f1e2, h2h3.
9. Commit Commit cxb7 (c6b7).
14...Ne4Haiku
1. Observe Halbzug 14, Schwarz am Zug. Phase: Eroeffnung. Weiss +13 Punkte. Legale Zuege: 28. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search12ms
3. Recall Opponent No pattern found for chess-opus-tm (tag=chess-opus-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Find forcing move (Ne4+ check likely best) to delay/stop b7 pawn promotion threat. Complete rapid development (Nc6, Bf5/Be6, castling) while exploiting Bg4 pin on Nf3 and coordinate piece pressure against…
- llm.plan86984ms · $0.0493
full reasoning
Phase: opening. Find forcing move (Ne4+ check likely best) to delay/stop b7 pawn promotion threat. Complete rapid development (Nc6, Bf5/Be6, castling) while exploiting Bg4 pin on Nf3 and coordinate piece pressure against White's exposed center. Neutralize the dangerous b7 pawn via forcing sequence, then consolidate with Nc6-Bf5-Nf6-Bg4 piece trio to launch coordinated counterattack against White's uncastled king before White consolidates queenside space. Critical: White b7 pawn one square from promotion (urgent threat); Black must play forcing move now (Ne4+ check forces king response and buys time for Black pieces to defend/counterattack); Bg4 pin on Nf3 is Black's only active piece—maintain tempo by forcing White reactions before piece coordination complete; Black severely underdeveloped (Nc6, Bf5/e6, castling all missing); if b7 pawn promotes, White's material advantage becomes overwhelming; speed is critical; Nd2 on d2 is defensive-only, blocking central play; exploiting this passivity + forcing king moves creates tactics.
6. Candidates Candidates: Bxf3 (Captures pinned Nf3, removes key defender, damages White's kingside pawn structure immediately) | Ne4 (Centralizes knight with tempo, pressures passive Nd2, creates coordinated piece attack on White's e…
- chess.js.legal_moves0ms
- llm.candidates37813ms · $0.0193
full reasoning
Candidates: Bxf3 (Captures pinned Nf3, removes key defender, damages White's kingside pawn structure immediately) | Ne4 (Centralizes knight with tempo, pressures passive Nd2, creates coordinated piece attack on White's exposed king) | e5 (Opens center, attacks c4 pawn, activates Black's position for coordinated piece counterplay)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ne4 — Centralizes knight with immediate threats to d2 and f2, forcing White response before b8=Q consolidates. Maintains initiative and piece tempo.. Rejected: g4f3, e7e5.
- llm.reflect52242ms · $0.0276
9. Commit Commit Ne4 (f6e4).
15.bxa8=Q+Opus
1. Observe Halbzug 15, Weiss am Zug. Phase: Eroeffnung. Weiss +13 Punkte. Legale Zuege: 33. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall: 12 similar position(s) found (limit=15).
- nex_search13ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Cash the b7 passer by capturing the a8-rook (or promoting), while neutralizing the Bg4 pin and Ne4 activity, then castle to lock in the crushing material lead. Convert a decisive +13 material advantage pl…
- llm.plan17842ms · $0.0597
full reasoning
Phase: opening. Cash the b7 passer by capturing the a8-rook (or promoting), while neutralizing the Bg4 pin and Ne4 activity, then castle to lock in the crushing material lead. Convert a decisive +13 material advantage plus the promoting b7-pawn into an overwhelming force by simplifying and trading down once the king is safe. Critical: b7-pawn one step from queening, attacks the a8-rook — collect it before Black consolidates; Bg4 pins Nf3 to d1-queen (per 'knights before bishops' / pin-relief): a careless capture loses the pin tension, but material gain outweighs structural damage; Ne4 is Black's only real activity (anti-kingside-before-castle heuristic warns against premature flank play) — watch ...Nxd2 and ...Nxf2 forks; Own king still on e1 ('castle early' heuristic): O-O within 1-2 moves once the rook is won.6. Candidates Candidates: bxa8=Q+ (Cashes the b7 passer with check, wins the a8-rook and a second queen — decisive material per 'collect passer before consolidation'.) | Nxe4 (Removes Ne4, Black's only activity and source of ...Nxd2/.…
- chess.js.legal_moves0ms
- llm.candidates10521ms · $0.0353
full reasoning
Candidates: bxa8=Q+ (Cashes the b7 passer with check, wins the a8-rook and a second queen — decisive material per 'collect passer before consolidation'.) | Nxe4 (Removes Ne4, Black's only activity and source of ...Nxd2/...Nxf2 forks; neutralizes counterplay before grabbing the rook.) | bxa8=R+ (Underpromotion check also wins the rook, avoiding any stalemate trap while keeping the crushing material edge intact.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: bxa8=Q+ — Promotes with check, winning the a8-rook and a second queen for a decisive ~+18 edge. The check forces Black to respond, so the threatened ...Nxd2/...Nxf2 forks never materialize before I consolidat…
- llm.reflect12374ms · $0.0399
full reasoning
Final pick: bxa8=Q+ — Promotes with check, winning the a8-rook and a second queen for a decisive ~+18 edge. The check forces Black to respond, so the threatened ...Nxd2/...Nxf2 forks never materialize before I consolidate.. Rejected: d2e4, b7a8r.
9. Commit Commit bxa8=Q+ (b7a8q).
16...Kd7Haiku
1. Observe Halbzug 16, Schwarz am Zug. Phase: Mittelspiel. Weiss +26 Punkte. Legale Zuege: 2. Schach! Criticality: 0.45.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search15ms
3. Recall Opponent No pattern found for chess-opus-tm (tag=chess-opus-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Play forcing knight checks (Nd2+ or Nf2+) to disrupt White's consolidation, drive king to move, and coordinate Ne4 + Bh4 toward mating threats against exposed White king. Buy time while creating back-r…
- llm.plan28395ms · $0.0134
full reasoning
Phase: middlegame. Play forcing knight checks (Nd2+ or Nf2+) to disrupt White's consolidation, drive king to move, and coordinate Ne4 + Bh4 toward mating threats against exposed White king. Buy time while creating back-rank or mid-board attack vectors. Force perpetual check or draw via initiative against White's uncastled king, compensating for material deficit through forcing tactics and coordinated piece pressure. Critical: White Queen a8 dominates; c4 pawn can promote soon — Black has no time; Black down 26 points — cannot win on material, only via forced attack/check; Only 2 legal moves available — both checks — limits flexibility but confirms forcing sequence necessary; White king e1 exposed; Black's bishop h4 + checks aim at f1–g1 mating patterns.
6. Candidates Candidates: Bc8 (Blocks queen's 8th-rank check; prevents c4 pawn promotion. Defensive necessity but buys counterplay time.) | Kd7 (Escapes check; keeps Bg4 attacking Nf3. Centralizes king, maintains piece activity for in…
- chess.js.legal_moves0ms
- llm.candidates72317ms · $0.0426
full reasoning
Candidates: Bc8 (Blocks queen's 8th-rank check; prevents c4 pawn promotion. Defensive necessity but buys counterplay time.) | Kd7 (Escapes check; keeps Bg4 attacking Nf3. Centralizes king, maintains piece activity for initiative generation.)
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd7 — King escapes a8 queen check, centralizes on d7. Bc8 blocks but loses bishop to Qxc8+ (check). Kd7 preserves pieces for follow-up threats like Nf2 attacking d1 queen.. Rejected: g4c8.
- llm.reflect69904ms · $0.0454
9. Commit Commit Kd7 (e8d7).
17.Qxe4Opus
1. Observe Halbzug 17, Weiss am Zug. Phase: Mittelspiel. Weiss +26 Punkte. Legale Zuege: 35. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 10 similar position(s) found (limit=15).
- nex_search15ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search9ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Liquidate Black's active pieces — capture the Ne4 with my d2-knight to kill the outpost and open lines, break the Bg4 pin, then secure my own king and plan an escape route for the deep Qa8 before Black…
- llm.plan19248ms · $0.0604
full reasoning
Phase: middlegame. Liquidate Black's active pieces — capture the Ne4 with my d2-knight to kill the outpost and open lines, break the Bg4 pin, then secure my own king and plan an escape route for the deep Qa8 before Black tries to trap it. Convert a decisive +26 material lead by trading down active enemy pieces, extracting my queen safely, and using the exposed Black king on d7 to force further simplification into a trivially winning endgame. Critical: Qa8 sits deep in the corner — Black may maneuver (…Bc5/…Nc5/…Rb8 ideas) to trap or harass it, so I must keep an exit; Ne4 is a strong central outpost per [MIDDLE weak squares outpost] — eliminating it (Nxe4) removes Black's only counterplay; Bg4 pins my Nf3 to the queen per [MIDDLE exchange heavy pieces]/pin-relief — resolve before a careless capture; my own king still uncastled; ignoring king safety risks giving back the edge.
6. Candidates Candidates: Nxe4+ (Eliminates the central Ne4 outpost [MIDDLE outpost] with discovered check from Qd1 along the open d-file to Kd7, gaining tempo and initiative.) | Qxe4 (Captures the knight AND extracts the deep Qa8 in …
- chess.js.legal_moves0ms
- llm.candidates16276ms · $0.0667
full reasoning
Candidates: Nxe4+ (Eliminates the central Ne4 outpost [MIDDLE outpost] with discovered check from Qd1 along the open d-file to Kd7, gaining tempo and initiative.) | Qxe4 (Captures the knight AND extracts the deep Qa8 in one move, solving the queen-trap risk and removing Black's only counterplay simultaneously.) | Qxf8 (Wins the Bf8 and frees the queen from the corner, but leaves the Ne4 outpost and Bg4 pin unresolved, slightly less clean.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qxe4 — Captures the Ne4 outpost free (undefended) AND extracts my deep Qa8 from the corner in one move, eliminating both the queen-trap risk and Black's only active piece while up ~+26 material.. Rejected: d2…
- llm.reflect15356ms · $0.0647
full reasoning
Final pick: Qxe4 — Captures the Ne4 outpost free (undefended) AND extracts my deep Qa8 from the corner in one move, eliminating both the queen-trap risk and Black's only active piece while up ~+26 material.. Rejected: d2e4, a8f8.
9. Commit Commit Qxe4 (a8e4).
18...e5Haiku
1. Observe Halbzug 18, Schwarz am Zug. Phase: Mittelspiel. Weiss +29 Punkte. Legale Zuege: 22. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search19ms
3. Recall Opponent No pattern found for chess-opus-tm (tag=chess-opus-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate g4 bishop to force captures on f3 Knight and d1 Queen. Prioritize Bd1 (Queen-for-bishop trade gains material). Once f8 bishop clears, bring h8 rook to support back-rank and middle-board attack…
- llm.plan90521ms · $0.0528
full reasoning
Phase: middlegame. Activate g4 bishop to force captures on f3 Knight and d1 Queen. Prioritize Bd1 (Queen-for-bishop trade gains material). Once f8 bishop clears, bring h8 rook to support back-rank and middle-board attack on exposed e1 King. Exploit White's uncastled King position through forcing bishop-rook tactics to generate perpetual check or fortress draw; material deficit (−29) is permanent, so only forced tactics create survival chances. Critical: c4 pawn threatens c5 promotion next move — Black has minimal time for slow improvements; White's overwhelming material advantage (two Queens, two Knights, two Bishops, two Rooks vs one Rook, two Bishops) is insurmountable; g4 bishop attacks both f3 Knight (Nf3, defended by Qe4) and targets d1 Queen (defended by Ke1 + Qe4) — Bd1 wins material (Q for B, +6 pts); White King e1 is uncastled and boxed in by own pieces; h8 rook and active bishops create back-rank and middle-board threats once f8 clears; Black cannot improve position slowly — only forcing tactics (checks, attacks, winning captures) prevent resignation before c-pawn runs.
6. Candidates Candidates: Bxf3 (Force recapture, remove defender, simplify to maximize tactical chances despite material deficit) | e5 (Attack Queen forcing move, open e-file for Rook and Bishop counterattack against exposed King) | R…
- chess.js.legal_moves0ms
- llm.candidates32866ms · $0.0176
full reasoning
Candidates: Bxf3 (Force recapture, remove defender, simplify to maximize tactical chances despite material deficit) | e5 (Attack Queen forcing move, open e-file for Rook and Bishop counterattack against exposed King) | Rg8 (Activate Rook off back rank, prepare middle-board support for bishop-rook tactics on uncastled King)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e5 — Attacks queen forcing move, opens e-file for rook activity. Maintains complexity needed for -29 deficit survival.. Rejected: g4f3, h8g8.
- llm.reflect43827ms · $0.0231
9. Commit Commit e5 (e7e5).
19.Nxe5+Opus
1. Observe Halbzug 19, Weiss am Zug. Phase: Mittelspiel. Weiss +29 Punkte. Legale Zuege: 40. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 10 similar position(s) found (limit=15).
- nex_search17ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search15ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Finish development and get my king safe (castle short), neutralize the Bg4 pressure on f3, then point my centralized queen and both rooks at the badly exposed Black king on d7 to force trades or mate. …
- llm.plan30269ms · $0.1357
full reasoning
Phase: middlegame. Finish development and get my king safe (castle short), neutralize the Bg4 pressure on f3, then point my centralized queen and both rooks at the badly exposed Black king on d7 to force trades or mate. Convert a decisive material surplus by coordinating queen + two rooks (per the 'piece coordination attack' heuristic — three pieces before pushing) against the stranded Kd7, simplifying via favorable exchanges (the 'exchange heavy pieces' principle: trade down when ahead to kill counterplay) into a trivially winning endgame. Critical: Bg4 pins/eyes Nf3 — prophylaxis needed (h3 to question it) before Black plays ...Bxf3 damaging my pawn cover; my king still on e1 with an open e-file and undeveloped Bc1/Bf1 — must castle and connect rooks onto open/half-open files ('open file rooks'); Black's only activity is the bishop pair (Bf8/Bg4); deny their diagonals and the win is mechanical, but a careless move could let ...e4 or ...Bxf3 generate cheap tactics against my exposed king.6. Candidates Candidates: Nxe5+ (Knight grabs e5 pawn with check and simultaneously forks the Bg4; after the king moves I win the bishop too, coordinating against exposed Kd7.) | Qxg4+ (Immediately wins Black's active bishop with chec…
- chess.js.legal_moves0ms
- llm.candidates11585ms · $0.0426
full reasoning
Candidates: Nxe5+ (Knight grabs e5 pawn with check and simultaneously forks the Bg4; after the king moves I win the bishop too, coordinating against exposed Kd7.) | Qxg4+ (Immediately wins Black's active bishop with check, removing his only counterplay and keeping queen centralized for the mechanical attack on Kd7.) | Qxe5 (Wins the e5 pawn keeping the queen powerful and central, but leaves Bg4 alive; less forcing than the two captures with check.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxe5+ — Nxe5+ wins the e5 pawn with check AND forks the Bg4; the king must move (knight checks can't be blocked), then Nxg4 wins the bishop. Nets pawn plus bishop versus Qxg4+'s bishop only.. Rejected: e4g4, …
- llm.reflect16970ms · $0.0652
full reasoning
Final pick: Nxe5+ — Nxe5+ wins the e5 pawn with check AND forks the Bg4; the king must move (knight checks can't be blocked), then Nxg4 wins the bishop. Nets pawn plus bishop versus Qxg4+'s bishop only.. Rejected: e4g4, e4e5.
9. Commit Commit Nxe5+ (f3e5).
20...Kd6Haiku
1. Observe Halbzug 20, Schwarz am Zug. Phase: Mittelspiel. Weiss +30 Punkte. Legale Zuege: 6. Schach! Criticality: 0.25.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search17ms
3. Recall Opponent No pattern found for chess-opus-tm (tag=chess-opus-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Escape check (Kd7 under attack from Ne5). Move to c8, d8, e8, or d6. Then activate Bg4 to threaten f3 Knight or create d1 Queen-trading leverage. Seek perpetual check via Rook h8 activation on back ran…
- llm.plan75406ms · $0.0411
full reasoning
Phase: middlegame. Escape check (Kd7 under attack from Ne5). Move to c8, d8, e8, or d6. Then activate Bg4 to threaten f3 Knight or create d1 Queen-trading leverage. Seek perpetual check via Rook h8 activation on back rank. Force White into defensive posture despite overwhelming material. Material deficit (-30 points) is permanent; cannot win via quiet maneuvering. Only viable strategy: force perpetual check through rook-bishop tactics on back rank and center, exploiting White's uncastled King at e1. Critical: King in check from Ne5 — legal moves restricted to King escapes (c8, d8, e8, d6 candidates); Bg4 already active but frozen until King clears; prioritize Bg4→f3 or →d1 post-escape for Queen-trade leverage; c4 pawn threatens c5 promotion next — Black has minimal time for slow improvements; White's uncastled King at e1 remains potential back-rank target via Rh8 if rook clears; Perpetual check is draw goal; material advantage makes positional defense futile without forcing tactics.
6. Candidates Candidates: Kd6 (Centralizes King, clears rank 7 for Rh8-e8 activity, enables Rook+Bishop perpetual tactics vs Ke1) | Kd8 (Keeps King safe on back rank, readies Rook toward center, conservative foundation for forcing che…
- chess.js.legal_moves0ms
- llm.candidates40756ms · $0.0212
full reasoning
Candidates: Kd6 (Centralizes King, clears rank 7 for Rh8-e8 activity, enables Rook+Bishop perpetual tactics vs Ke1) | Kd8 (Keeps King safe on back rank, readies Rook toward center, conservative foundation for forcing checks) | Ke8 (Alternative back-rank safety, clears d-file, frees rank 7 for Rook to activate on e-file)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd6 — Centralizes King. After c5+ (if White advances), Kxc5 places King actively on c5, supporting perpetual checks. Clears rank 7 for Re8 activation to threaten uncastled Ke1.. Rejected: d7d8, d7e8.
- llm.reflect100355ms · $0.0575
9. Commit Commit Kd6 (d7d6).
21.Nxf7+Opus
1. Observe Halbzug 21, Weiss am Zug. Phase: Mittelspiel. Weiss +30 Punkte. Legale Zuege: 46. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 10 similar position(s) found (limit=15).
- nex_search13ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search7ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Exploit Black's stranded king on d6 with my centralized queen and knight; the Ne5 already attacks the loose Bg4 and the d7/c6 escape squares, so I want to win that bishop or land a decisive check while…
- llm.plan22918ms · $0.1003
full reasoning
Phase: middlegame. Exploit Black's stranded king on d6 with my centralized queen and knight; the Ne5 already attacks the loose Bg4 and the d7/c6 escape squares, so I want to win that bishop or land a decisive check while finishing development. With a crushing material surplus (per 'exchange heavy pieces' / simplify-when-ahead), hunt the exposed central king for mate or force trades into a trivially won endgame — no need for slow play. Critical: Bg4 hangs to Ne5 and also eyes my back rank — grab or neutralize it; per 'piece coordination attack' I want 3 attackers on Kd6 before committing; per 'prophylaxis' check I'm not blundering my own loose king on e1 to any Bishop/Rook tactic; opponent has no real threats given missing queen, so initiative is fully mine..
6. Candidates Candidates: Nxf7+ (Royal fork: check on Kd6 wins the Rh8 next move, adding decisive material while king stays exposed.) | Qd5+ (Centralized check, c4-pawn backs the queen; drives Ke7 and keeps three-attacker king hunt al…
- chess.js.legal_moves0ms
- llm.candidates16253ms · $0.0608
full reasoning
Candidates: Nxf7+ (Royal fork: check on Kd6 wins the Rh8 next move, adding decisive material while king stays exposed.) | Qd5+ (Centralized check, c4-pawn backs the queen; drives Ke7 and keeps three-attacker king hunt alive.) | Nxg4 (Grabs the loose Bg4, neutralizing back-rank ideas and simplifying when massively ahead per simplify-when-ahead.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxf7+ — Knight from e5 forks Kd6 and Rh8 with check; after the king moves Nxh8 nets a full rook plus the f7 pawn, extending an already winning material lead decisively.. Rejected: e4d5, e5g4.
- llm.reflect14032ms · $0.0528
9. Commit Commit Nxf7+ (e5f7).
22...Kc5Haiku
1. Observe Halbzug 22, Schwarz am Zug. Phase: Mittelspiel. Weiss +31 Punkte. Legale Zuege: 2. 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-opus-tm (tag=chess-opus-tm) — mandatory run documented.
- nex_entity_search14ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Escape King from check. Activate Rook to back rank for perpetual-check threats. Deploy Bishops to support Rook attacks. Create tactical complications despite material deficit. Perpetual check is the on…
- llm.plan73776ms · $0.0449
full reasoning
Phase: middlegame. Escape King from check. Activate Rook to back rank for perpetual-check threats. Deploy Bishops to support Rook attacks. Create tactical complications despite material deficit. Perpetual check is the only survival strategy. Target White's uncastled King on e1 via Rook on back rank. Accept material loss and delay checkmate through tactics. Critical: opponent threat: White's Knight controls center; two Queens dominate key squares; Rook undefended and hanging; own weakness: 31 points behind in material; King exposed and restricted; only Rook viable for counterplay; concrete tactical threat: White may capture Rook immediately, advance Queens to restrict King, or initiate back-rank mating attack.
6. Candidates Candidates: Kc5 (Active escape toward center/queenside; creates maximum complications in desperate position; fits aggressive tactical plan.) | Kd7 (Escapes check while maintaining relative centralization; safer but passi…
- chess.js.legal_moves0ms
- llm.candidates21841ms · $0.0095
full reasoning
Candidates: Kc5 (Active escape toward center/queenside; creates maximum complications in desperate position; fits aggressive tactical plan.) | Kd7 (Escapes check while maintaining relative centralization; safer but passive; supports potential Rook back-rank maneuvers.)
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kc5 — Aggressive King activation creates maximum tactical complications. Positions King toward center/queenside supporting Rook perpetual-check plan. Sharp counterplay despite material deficit.. Rejected: d6d…
- llm.reflect34255ms · $0.0168
full reasoning
Final pick: Kc5 — Aggressive King activation creates maximum tactical complications. Positions King toward center/queenside supporting Rook perpetual-check plan. Sharp counterplay despite material deficit.. Rejected: d6d7.
9. Commit Commit Kc5 (d6c5).
23.Qd5+Opus
1. Observe Halbzug 23, Weiss am Zug. Phase: Mittelspiel. Weiss +31 Punkte. Legale Zuege: 48. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 10 similar position(s) found (limit=15).
- nex_search16ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Drive a mating net around Black's stranded king on c5 using the centralized queen, the c4 pawn break and a rook lift, while keeping every escape square covered. With a decisive material surplus, conver…
- llm.plan15839ms · $0.0513
full reasoning
Phase: middlegame. Drive a mating net around Black's stranded king on c5 using the centralized queen, the c4 pawn break and a rook lift, while keeping every escape square covered. With a decisive material surplus, convert by hunting the exposed open-field king for forced mate rather than slow simplification — coordinate three attackers per the 'piece coordination attack' principle. Critical: Black king on c5 is fully exposed with no pawn cover — primary target; Bg4 eyes my back rank and is loose, neutralize per prophylaxis before overextending; ensure pawn checks (b-file/c-file) cut escape squares rather than open them, avoid stalemate-of-attack by losing tempo.
6. Candidates Candidates: b4+ (Pawn check drives the exposed c5 king while c4/Qe4 blanket escape squares; opens mating net per piece-coordination attack.) | Qd5+ (Queen check defended by c4 pawn, cannot be captured; shoves king to b6/…
- chess.js.legal_moves0ms
- llm.candidates17745ms · $0.0666
full reasoning
Candidates: b4+ (Pawn check drives the exposed c5 king while c4/Qe4 blanket escape squares; opens mating net per piece-coordination attack.) | Qd5+ (Queen check defended by c4 pawn, cannot be captured; shoves king to b6/b4 into coordinated rook-lift hunt.) | Qe5+ (Central queen check cutting the fifth rank, restricting the stranded king and keeping the initiative toward forced mate.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qd5+ — Queen check shielded by the c4 pawn, so it is untouchable; it forces the king to b6/b4 straight into the rook-lift hunt while keeping the net airtight and the queen safe.. Rejected: b2b4, e4e5.
- llm.reflect20762ms · $0.0809
9. Commit Commit Qd5+ (e4d5).
24...Kb6Haiku
1. Observe Halbzug 24, Schwarz am Zug. Phase: Mittelspiel. Weiss +31 Punkte. Legale Zuege: 2. 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-opus-tm (tag=chess-opus-tm) — mandatory run documented.
- nex_entity_search6ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Escape check (forced). King must reach a square where it avoids further checks. Immediately activate Rook from h8 to back rank or h-file for perpetual-check threats. Deploy Bishops as supporting pieces…
- llm.plan18257ms · $0.0061
full reasoning
Phase: middlegame. Escape check (forced). King must reach a square where it avoids further checks. Immediately activate Rook from h8 to back rank or h-file for perpetual-check threats. Deploy Bishops as supporting pieces. Every move must create a checking pattern or force White King movement. Perpetual check is the only draw mechanism—force White King to oscillate between squares via back-rank and lateral checks until repetition or 50-move rule. Critical: Opponent threats: Nxh8 after King escapes; White Queen controls key squares; Rook h8 hanging if not activated; Own weaknesses: King on c5 restricted; 31 points material down; Bishops uncoordinated; few escape squares; Concrete tactical threats: After King move, Rook must reach back rank in one or two moves to generate perpetual; if Rook captured, endgame is lost immediately.
6. Candidates Candidates: Kb6 (Escapes check, moves King toward the wing safely. Enables Rh1+ perpetual check threat on next move.) | Kb4 (Escapes check, keeps King centrally flexible. Provides multiple escape options if White continu…
- chess.js.legal_moves0ms
- llm.candidates118893ms · $0.0685
full reasoning
Candidates: Kb6 (Escapes check, moves King toward the wing safely. Enables Rh1+ perpetual check threat on next move.) | Kb4 (Escapes check, keeps King centrally flexible. Provides multiple escape options if White continues Qd4+ check.)
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kb6 — Escapes check. Positions King safely on wing; enables Rh1+ perpetual-check threat on next move. Back-rank activation critical for draw.. Rejected: c5b4.
- llm.reflect15906ms · $0.0061
9. Commit Commit Kb6 (c5b6).
25.Qb5#Opus
1. Observe Halbzug 25, Weiss am Zug. Phase: Mittelspiel. Weiss +31 Punkte. Legale Zuege: 48. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 10 similar position(s) found (limit=15).
- nex_search8ms
3. Recall Opponent No pattern found for chess-haiku-tm (tag=chess-haiku-tm) — mandatory run documented.
- nex_entity_search5ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Tighten the net on the exposed b6 king: bring the d2-knight toward c4/b3 and use the c4-c5 pawn lever plus the centralized queen to strip escape squares, aiming for forced mate rather than trades. With…
- llm.plan15668ms · $0.0512
full reasoning
Phase: middlegame. Tighten the net on the exposed b6 king: bring the d2-knight toward c4/b3 and use the c4-c5 pawn lever plus the centralized queen to strip escape squares, aiming for forced mate rather than trades. With a decisive material surplus and Black's king stranded on the open b6 square, hunt it down with three coordinated attackers (queen, both knights, rook) per the piece-coordination-attack principle instead of slow simplification. Critical: Black king on b6 has zero pawn cover — primary target; cut c5/a5/a6 escape squares before committing; Bg4 is loose and eyes d1/back rank — apply prophylaxis (per the prophylaxis heuristic) so no back-rank counter derails the attack; keep the f7-knight and d5-queen coordinated; avoid greedy grabs (Nxh8) that release the king-hunt tempo.
6. Candidates Candidates: Qb5# (Checkmate. The queen delivers mate on b5 — the b6 king has zero escape squares. Ends the king-hunt instantly.) | Qc5+ (Forcing check that drives the king, but inferior since Qb5 is immediate mate; only …
- chess.js.legal_moves0ms
- llm.candidates9523ms · $0.0234
full reasoning
Candidates: Qb5# (Checkmate. The queen delivers mate on b5 — the b6 king has zero escape squares. Ends the king-hunt instantly.) | Qc5+ (Forcing check that drives the king, but inferior since Qb5 is immediate mate; only a fallback.) | Qd6+ (Check continuing the net, but slow compared to the available forced mate on b5.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qb5# — Checkmate. Qb5 covers a6/c6/c5 while c4 and the Nd2/c7-pawn seal a5/b7; the b6 king has no flight square and no capture of the queen. The king-hunt ends instantly.. Rejected: d5c5, d5d6.
- llm.reflect8900ms · $0.0182
9. Commit Commit Qb5# (d5b5).
PGN
PGN anzeigen
[Event "Tournament Pairing 2"] [Site "?"] [Date "2026-05-30"] [Round "?"] [White "chess-opus-tm"] [Black "chess-haiku-tm"] [Result "*"] 1. e4 d5 2. exd5 Nf6 3. c4 Nc6 4. Nf3 Bf5 5. dxc6 Qxd2+ 6. Nbxd2 Bg4 7. cxb7 Ne4 8. bxa8=Q+ Kd7 9. Qxe4 e5 10. Nxe5+ Kd6 11. Nxf7+ Kc5 12. Qd5+ Kb6 13. Qb5# *