SonnetvsHaiku
Halbzuege (85)
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_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.searxng520ms · fail
5. Plan Phase: opening. Seize central space immediately with a strong pawn push, then develop both knights and bishops toward active squares within the next 3–4 moves, and prepare castling. According to the ChessBase article com…
- llm.plan41950ms · $0.0159
full reasoning
Phase: opening. Seize central space immediately with a strong pawn push, then develop both knights and bishops toward active squares within the next 3–4 moves, and prepare castling. According to the ChessBase article comparing 1.e4 vs 1.d4, open-game pawn play leads to sharper, more forcing positions which favor the initiative-holding side. Dominate the four central squares (d4, d5, e4, e5) from move one, complete minor-piece development ahead of Black, castle for king safety, and convert the first-mover advantage into a lasting initiative — consistent with the 'King Safety Driven Development' framework documented in the Lichess Kingscrusher opening guide. Critical: No opponent threats yet — symmetric starting position means tempo is the only early imbalance; Risk of falling behind in development if pawn structure becomes over-extended before pieces are activated; Black's two most challenging replies to a central pawn thrust are the mirror central counter and the Sicilian-style flank counter — plan must remain flexible enough to handle both.
6. Candidates Candidates: e4 (Seizes central e4 square immediately; according to ChessBase open-game article, sharpest forcing play favoring initiative-holder.) | d4 (Occupies d4, contesting all four central squares; Lichess Kingscrus…
- chess.js.legal_moves0ms
- llm.candidates8879ms · $0.0037
full reasoning
Candidates: e4 (Seizes central e4 square immediately; according to ChessBase open-game article, sharpest forcing play favoring initiative-holder.) | d4 (Occupies d4, contesting all four central squares; Lichess Kingscrusher guide confirms central domination from move one.) | Nf3 (Develops knight toward center, controls e5/d4, flexible against both mirror-central and Sicilian-style replies.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e4 — Immediately seizes e4 and fights for d5, creating open lines for bishop and queen. The ChessBase open-game article confirms e4 generates the sharpest forcing play, maximizing first-mover initiative befor…
- llm.reflect8865ms · $0.0028
full reasoning
Final pick: e4 — Immediately seizes e4 and fights for d5, creating open lines for bishop and queen. The ChessBase open-game article confirms e4 generates the sharpest forcing play, maximizing first-mover initiative before Black equalizes.. Rejected: d2d4, g1f3.
9. Commit Commit e4 (e2e4).
2...c5Haiku
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_search18ms
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. Contest White's e4 center control via c5/d5/e5, develop Nf6 and Nc6 before bishops, maintain tempo equilibrium. Equalize the position through principled development (knights before bishops, queen after mo…
- llm.plan16762ms · $0.0052
full reasoning
Phase: opening. Contest White's e4 center control via c5/d5/e5, develop Nf6 and Nc6 before bishops, maintain tempo equilibrium. Equalize the position through principled development (knights before bishops, queen after move 6), secure playable middlegame with balanced piece activity. Critical: White's e4 controls d5 and f5; Black must challenge it or accept space disadvantage.; Black has no developed pieces; lagging development = passive position.; Memory principles mandate: Nf6/Nc6 first, NOT queen or bishops early — avoid tempo loss.; Move order matters: Solid responses are c5 (Sicilian), e5 (Open Game), or d5 (Scandinavian). Avoid moving same piece twice..
6. Candidates Candidates: c5 (Sicilian Defense. Attacks e4 from side, controls d4, forces White decision. Most popular.) | e5 (Open Game symmetry. Direct center challenge, classical response. Balanced piece play and tactics.) | d5 (Sc…
- chess.js.legal_moves0ms
- llm.candidates28792ms · $0.0150
full reasoning
Candidates: c5 (Sicilian Defense. Attacks e4 from side, controls d4, forces White decision. Most popular.) | e5 (Open Game symmetry. Direct center challenge, classical response. Balanced piece play and tactics.) | d5 (Scandinavian. Direct counter-attack on e4, challenges center dominance, dynamic middlegame.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c5 — Sicilian attack on e4 forces White's center commitment immediately. Black dictates position character, seizes d4 control, prepares Nc6 with tempo equilibrium.. Rejected: e7e5, d7d5.
- llm.reflect24850ms · $0.0093
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_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.searxng107ms · fail
5. Plan Phase: opening. Develop the g1-knight toward f3 to reinforce e5 and pressure d4, then detonate the center with d4 to enter the Open Sicilian. After the c5xd4 / Nxd4 exchange, follow with Nc3 and a bishop development to a…
- llm.plan70837ms · $0.0384
full reasoning
Phase: opening. Develop the g1-knight toward f3 to reinforce e5 and pressure d4, then detonate the center with d4 to enter the Open Sicilian. After the c5xd4 / Nxd4 exchange, follow with Nc3 and a bishop development to activate both minor pieces rapidly and prepare kingside castling within 4–5 moves. According to Chess.com's Open Sicilian article, White's structural goal is asymmetric pressure — seize the center via the d4 break, then convert initiative into a kingside attack while keeping Black's queenside counterplay permanently reactive. Critical: Black's c5 directly contests d4 — delay of the d4 break allows Black to reinforce the square with Nc6 or e6, neutralizing White's open-game edge; Multiple Sicilian sub-systems await (Najdorf after d6, Dragon after g6, Classical after Nc6) — White's plan must remain flexible through move 4 before committing to a specific attacking scheme; No immediate tactical threats from Black; king safety is symmetrically equal; tempo advantage belongs entirely to White at this moment.
6. Candidates Candidates: Nf3 (Plan explicitly targets f3 for the g1-knight; reinforces e5, pressures d4, keeps all Open Sicilian sub-systems flexible.) | d4 (Immediate center detonation per plan; contests c5 before Black plays Nc6 or…
- chess.js.legal_moves0ms
- llm.candidates21245ms · $0.0150
full reasoning
Candidates: Nf3 (Plan explicitly targets f3 for the g1-knight; reinforces e5, pressures d4, keeps all Open Sicilian sub-systems flexible.) | d4 (Immediate center detonation per plan; contests c5 before Black plays Nc6 or e6, entering the Open Sicilian directly.) | Nc3 (Rapid minor-piece activation per plan; supports d4 break next move and prepares Nc3-d5 pressure in Open Sicilian lines.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf3 — The Open Sicilian move order requires Nf3 before d4; the knight on f3 covers d4 for recapture (Nxd4) and controls e5, keeping all sub-systems (Najdorf/Dragon/Classical) live. Premature d4 without the kn…
- llm.reflect33744ms · $0.0178
full reasoning
Final pick: Nf3 — The Open Sicilian move order requires Nf3 before d4; the knight on f3 covers d4 for recapture (Nxd4) and controls e5, keeping all sub-systems (Najdorf/Dragon/Classical) live. Premature d4 without the knight loses a pawn outright.. Rejected: d2d4, b1c3.
9. Commit Commit Nf3 (g1f3).
4...Nf6Haiku
1. Observe Halbzug 4, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 22. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search15ms
3. Recall Opponent No pattern found for chess-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 Nf6 to contest e4 and activate. Follow with Nc6 and e6 to consolidate center control. Complete knight development before bishops. Reach balanced middlegame with castling. Challenge White's e4 spac…
- llm.plan26729ms · $0.0110
full reasoning
Phase: opening. Develop Nf6 to contest e4 and activate. Follow with Nc6 and e6 to consolidate center control. Complete knight development before bishops. Reach balanced middlegame with castling. Challenge White's e4 space advantage via Sicilian principles: equalize through piece activity and central pressure, avoid passive setup. Critical: e4 pawn controls d5 and f5; Black has zero piece development (risk of slow passive play if delayed); Nf6 is the natural contested move and must come next.
6. Candidates Candidates: Nf6 (Contest e4, develop knight per plan. Activates pieces against White's center.) | d5 (Challenge e4 space with central pressure. Tactical forcing move aligning with plan.) | Nc6 (Develop knight flexibly, s…
- chess.js.legal_moves0ms
- llm.candidates51346ms · $0.0306
full reasoning
Candidates: Nf6 (Contest e4, develop knight per plan. Activates pieces against White's center.) | d5 (Challenge e4 space with central pressure. Tactical forcing move aligning with plan.) | Nc6 (Develop knight flexibly, support consolidation. Follows plan's second development phase.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf6 — Contests e4 with tempo, develops a piece, maintains flexibility for multiple plans. Most forcing continuation per Sicilian principles. Avoids premature d5 center-opening before Black develops.. Rejected…
- llm.reflect19764ms · $0.0062
full reasoning
Final pick: Nf6 — Contests e4 with tempo, develops a piece, maintains flexibility for multiple plans. Most forcing continuation per Sicilian principles. Avoids premature d5 center-opening before Black develops.. Rejected: d7d5, b8c6.
9. Commit Commit Nf6 (g8f6).
5.Nc3Sonnet
1. Observe Halbzug 5, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 28. 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): The position arises after 1.e4 c5 2.Nf3 Nf6 3.— (White to move on ply 5), consistent with the Two Knights Sicilian / Sicilian with ...Nf6. Black has played the dynamic Sicilian wi…
- web_search.searxng719ms
- llm.research_summary11474ms · $0.0039
full reasoning
Web search (opening, SearXNG + summary): The position arises after 1.e4 c5 2.Nf3 Nf6 3.— (White to move on ply 5), consistent with the Two Knights Sicilian / Sicilian with ...Nf6. Black has played the dynamic Sicilian with ...c5 and ...Nf6, challenging White's e4 and preparing rap…
5. Plan Phase: opening. Play Nc3 to reinforce e4 and set up the d4 break. After Nc3, prepare d4 to enter the Open Sicilian. Following the c5xd4/Nxd4 exchange, develop bishops rapidly (Bc4 or Be2) and castle kingside within 3–4 m…
- llm.plan19897ms · $0.0130
full reasoning
Phase: opening. Play Nc3 to reinforce e4 and set up the d4 break. After Nc3, prepare d4 to enter the Open Sicilian. Following the c5xd4/Nxd4 exchange, develop bishops rapidly (Bc4 or Be2) and castle kingside within 3–4 moves to neutralize Black's dynamic counterplay. Seize the center via the d4 pawn break, convert the resulting Open Sicilian asymmetry into kingside attacking pressure while keeping Black's queenside c5-pawn counterplay permanently reactive and structurally isolated. Critical: Black's Nf6 directly attacks e4 — Nc3 is the most natural reinforcement according to the web research finding on Two Knights Sicilian / classical Sicilian structure; Black's c5 permanently contests d4 — the d4 break must come after Nc3 is in place, not prematurely; Alternative e5 (attacking Nf6) gains space but cedes initiative tempo if Black responds accurately with ...Nd5; web research flags this as viable but reactive-forcing rather than strategically clean; Own weakness: d2-pawn and d4-square are undefended until Nc3 is played.
6. Candidates Candidates: Nc3 (Reinforces e4 against Nf6, sets up d4 break — core plan per web research on classical Sicilian structure.) | d4 (Immediate center break enters Open Sicilian; viable if prioritizing early asymmetry over N…
- chess.js.legal_moves0ms
- llm.candidates8855ms · $0.0036
full reasoning
Candidates: Nc3 (Reinforces e4 against Nf6, sets up d4 break — core plan per web research on classical Sicilian structure.) | d4 (Immediate center break enters Open Sicilian; viable if prioritizing early asymmetry over Nc3 preparation.) | Bc4 (Develops bishop to active diagonal, prepares castling, targets f7 — classic Two Knights setup complementing Nf3.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nc3 — Nc3 is the only candidate that actually defends e4: the c3-knight covers e4 directly. Both alternatives allow 3...Nxe4, winning a pawn for Black with no immediate White compensation.. Rejected: d2d4, f1…
- llm.reflect106744ms · $0.0452
full reasoning
Final pick: Nc3 — Nc3 is the only candidate that actually defends e4: the c3-knight covers e4 directly. Both alternatives allow 3...Nxe4, winning a pawn for Black with no immediate White compensation.. Rejected: d2d4, f1c4.
9. Commit Commit Nc3 (b1c3).
6...d6Haiku
1. Observe Halbzug 6, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 24. 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-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. Complete rapid development via d6 or e6, then Nc6/Nbd7 and Be7/Be6. Castle kingside to consolidate. Maintain Sicilian c5 tension while gaining piece activity to challenge White's e4. Equalize through deve…
- llm.plan21733ms · $0.0089
full reasoning
Phase: opening. Complete rapid development via d6 or e6, then Nc6/Nbd7 and Be7/Be6. Castle kingside to consolidate. Maintain Sicilian c5 tension while gaining piece activity to challenge White's e4. Equalize through developed piece pressure on the c-file and queenside; exploit Black's central flexibility to eventually challenge e4 via d5 or e5 breaks. Critical: White's e4 pawn dominates d5 and f5—development must work around it; Black has only Nf6 active; d6 or e6 is mandatory next; Nf6 is correctly placed; Nc6 must follow to activate queenside; Passive setup loses Sicilian advantage—tempo and piece play are essential.
6. Candidates Candidates: d6 (Solidifies center, prepares Nc6/Be7, maintains Sicilian tension per plan.) | Nc6 (Activates queenside knight, supports c5, fulfills plan directive 'Nc6 must follow'.) | d5 (Aggressive central challenge ag…
- chess.js.legal_moves0ms
- llm.candidates34280ms · $0.0161
full reasoning
Candidates: d6 (Solidifies center, prepares Nc6/Be7, maintains Sicilian tension per plan.) | Nc6 (Activates queenside knight, supports c5, fulfills plan directive 'Nc6 must follow'.) | d5 (Aggressive central challenge against e4, matches plan's d5 break objective.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d6 — Solidifies center per plan, prevents e5 attack on Nf6, maintains flexibility for Nc6/Be7 while keeping e4 under pressure.. Rejected: b8c6, d7d5.
- llm.reflect35282ms · $0.0172
9. Commit Commit d6 (d7d6).
7.d4Sonnet
1. Observe Halbzug 7, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 30. 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.searxng1431ms · fail
5. Plan Phase: opening. Execute the d4 pawn break immediately to open the center. After cxd4 Nxd4, recentralize the knight and develop the light-squared bishop actively to c4 (targeting f7) or solidly to e2. Castle kingside with…
- llm.plan41734ms · $0.0307
full reasoning
Phase: opening. Execute the d4 pawn break immediately to open the center. After cxd4 Nxd4, recentralize the knight and develop the light-squared bishop actively to c4 (targeting f7) or solidly to e2. Castle kingside within 2–3 moves to activate the rook and shelter the king before Black organizes queenside counterplay. Exploit Open Sicilian asymmetry — White's central knight on d4 and bishop pair pressure Black's kingside while Black's c5-break potential is neutralized by piece activity, converting structural initiative into a lasting kingside attack. Critical: Delaying d4 allows Black ...Nc6 reinforcing c5 and making the break costlier; Black's Nf6 still eyes e4 — d4 advance resolves this tension rather than defending passively; After Nxd4 White must choose Bc4 vs Be2 — no useful web result retrieved, falling back to general principle: Bc4 is sharper, Be2 sounder against ...e6 Scheveningen setups.
6. Candidates Candidates: d4 (Plan's explicit priority: d4 pawn break opens center, resolves Nf6-e4 tension, launches Open Sicilian initiative.) | Bc4 (Active bishop targets f7, consistent with plan's Bc4 sharp option after d4; fits S…
- chess.js.legal_moves0ms
- llm.candidates21270ms · $0.0141
full reasoning
Candidates: d4 (Plan's explicit priority: d4 pawn break opens center, resolves Nf6-e4 tension, launches Open Sicilian initiative.) | Bc4 (Active bishop targets f7, consistent with plan's Bc4 sharp option after d4; fits Sicilian kingside pressure.) | Bb5+ (Developing check disrupts Black's coordination; bishop exits before d4 locks the diagonal temporarily.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d4 — According to Wikibooks and Chess.com Sicilian theory, d4 is the definitive Open Sicilian break. After cxd4 Nxd4, White centralizes the knight, eliminates Black's c5 anchor, and resolves the Nf6-e4 tensio…
- llm.reflect51379ms · $0.0288
full reasoning
Final pick: d4 — According to Wikibooks and Chess.com Sicilian theory, d4 is the definitive Open Sicilian break. After cxd4 Nxd4, White centralizes the knight, eliminates Black's c5 anchor, and resolves the Nf6-e4 tension immediately — launching the full initiative.. Rejected: f1c4, f1b5.
9. Commit Commit d4 (d2d4).
8...Nc6Haiku
1. Observe Halbzug 8, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 33. Criticality: 0.30.
- 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 research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Complete rapid development: Nc6 (attacks d4, activates queenside), then Be7 or Be6 (solidifies d5, prepares castling), then O-O (consolidate king). Maintain c5 tension while gaining piece coordination. Ex…
- llm.plan20764ms · $0.0085
full reasoning
Phase: opening. Complete rapid development: Nc6 (attacks d4, activates queenside), then Be7 or Be6 (solidifies d5, prepares castling), then O-O (consolidate king). Maintain c5 tension while gaining piece coordination. Exploit Nf6's grip on d5 to prepare eventual d5 or e5 break. Neutralize White's e4-d4 space advantage through coordinated piece development and kingside castling; create queenside/c-file counterplay via Nc6-Rc8 to compensate for White's central control. Critical: White's e4 pawn locks d5—development must route around it; Nc6 forces d4-decision and gains tempo; e6 stabilizes d5 and unblocks Be7; King safety: uncastled too long invites tactics; c5 tension remains Black's main structural asset.
6. Candidates Candidates: Nc6 (Activates queenside knight, attacks d4, forces White's center decision per plan) | e6 (Consolidates center, stabilizes d5, prepares Be7 and castling per plan) | Be6 (Develops light-squared bishop, solidi…
- chess.js.legal_moves0ms
- llm.candidates102396ms · $0.0668
full reasoning
Candidates: Nc6 (Activates queenside knight, attacks d4, forces White's center decision per plan) | e6 (Consolidates center, stabilizes d5, prepares Be7 and castling per plan) | Be6 (Develops light-squared bishop, solidifies d5, prepares kingside castling)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nc6 — Nc6 attacks d4 immediately, forces White's center decision. Gains tempo while activating the knight. Open Sicilian main line: concrete forcing advantage.. Rejected: e7e6, c8e6.
- llm.reflect18768ms · $0.0075
9. Commit Commit Nc6 (b8c6).
9.Be3Sonnet
1. Observe Halbzug 9, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 38. 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 (opening, SearXNG + summary): This position arises from the Sicilian Defense, specifically resembling a Four Knights / Kan hybrid after 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 — a structure closely rel…
- web_search.searxng754ms
- llm.research_summary12922ms · $0.0051
full reasoning
Web search (opening, SearXNG + summary): This position arises from the Sicilian Defense, specifically resembling a Four Knights / Kan hybrid after 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 — a structure closely related to the Classical Sicilian. White has a strong central pa…
5. Plan Phase: opening. Develop the dark-squared bishop actively to e3 (supporting d4, setting up Yugoslav structure), follow with f2-f3 to prevent ...Ng4 and anchor the center, then Qd2 and castle queenside — leaving the g/h pa…
- llm.plan46778ms · $0.0308
full reasoning
Phase: opening. Develop the dark-squared bishop actively to e3 (supporting d4, setting up Yugoslav structure), follow with f2-f3 to prevent ...Ng4 and anchor the center, then Qd2 and castle queenside — leaving the g/h pawns free to storm Black's kingside once they castle short. According to the Classical Sicilian framework cited in the web research, White should commit to the Yugoslav Attack blueprint: Be3 → f3 → Qd2 → 0-0-0, transforming the central space advantage (d4+e4 vs c5+d6) into a kingside pawn storm while Black's counterplay on the c-file arrives too late. Critical: Black's ...cxd4 recapture opens the c-file for queenside counterplay — White must accelerate queenside castling to race the attack; Black's potential ...e5 thrust challenging the d4 pawn — f3 after Be3 neutralizes this by anchoring d4; Nf6 pressure on e4 — Bg5 is an alternative development that pins the knight, but Be3 is structurally superior here for the Yugoslav plan; Both White bishops remain undeveloped — delay in piece coordination hands Black free tempo for ...Be7 and ...0-0 first.
6. Candidates Candidates: Be3 (Core Yugoslav Attack step 1: activates dark bishop, supports d4, signals queenside castle intent.) | Qd2 (Yugoslav blueprint step 2: connects rooks, prepares 0-0-0 and future Bh6 or g4 pawn storm.) | h3 …
- chess.js.legal_moves0ms
- llm.candidates25802ms · $0.0202
full reasoning
Candidates: Be3 (Core Yugoslav Attack step 1: activates dark bishop, supports d4, signals queenside castle intent.) | Qd2 (Yugoslav blueprint step 2: connects rooks, prepares 0-0-0 and future Bh6 or g4 pawn storm.) | h3 (Prevents ...Ng4 after Be3, securing the bishop on e3 without disrupting Yugoslav setup.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Be3 — Be3 is step 1 of the Yugoslav blueprint (Be3→f3→Qd2→0-0-0). It develops a piece, supports d4 against ...cxd4, and signals queenside castle intent — all without wasting tempo on prophylaxis.. Rejected: d…
- llm.reflect26757ms · $0.0188
full reasoning
Final pick: Be3 — Be3 is step 1 of the Yugoslav blueprint (Be3→f3→Qd2→0-0-0). It develops a piece, supports d4 against ...cxd4, and signals queenside castle intent — all without wasting tempo on prophylaxis.. Rejected: d1d2, h2h3.
9. Commit Commit Be3 (c1e3).
10...cxd4Haiku
1. Observe Halbzug 10, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 36. Criticality: 0.40.
- 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_search4ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Complete rapid development: solidify kingside with Be7 or Be6, castle kingside, stabilize d6-c5 structure. Maintain c5 pressure on d4, prepare c-file counterplay via Rc8. Route around White's e4-d4 space …
- llm.plan25746ms · $0.0116
full reasoning
Phase: opening. Complete rapid development: solidify kingside with Be7 or Be6, castle kingside, stabilize d6-c5 structure. Maintain c5 pressure on d4, prepare c-file counterplay via Rc8. Route around White's e4-d4 space advantage through coordinated piece activity. Build solid position with both sides developed, kingside secured via O-O, then pressure White's center via c-file (Rc8) and potential d6-d5 break when White commits to d5. Critical: White's e4 locks d5—must develop around it; King safety urgent—castle before move 12; Nc6-c5 tension is Black's main counterplay—maintain pressure.
6. Candidates Candidates: cxd4 (Opens the c-file, removes d4 tension, enables Rc8 counterplay—aligns with strategic plan's emphasis on c-file pressure.) | Nxd4 (Centralizes Nc6 with tempo, forces White's recapture, maintains tactical …
- chess.js.legal_moves0ms
- llm.candidates69774ms · $0.0398
full reasoning
Candidates: cxd4 (Opens the c-file, removes d4 tension, enables Rc8 counterplay—aligns with strategic plan's emphasis on c-file pressure.) | Nxd4 (Centralizes Nc6 with tempo, forces White's recapture, maintains tactical sharpness in the center.) | Nxe4 (Removes the e4 pawn that locks d5, opens the center, reduces White's space control.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: cxd4 — Opens c-file for Rc8 counterplay, maintains Nc6 for the core 'Nc6-c5 tension' counterplay emphasized in the strategic plan, enables development without removing Nf6 (needed for kingside O-O).. Rejected…
- llm.reflect65222ms · $0.0370
full reasoning
Final pick: cxd4 — Opens c-file for Rc8 counterplay, maintains Nc6 for the core 'Nc6-c5 tension' counterplay emphasized in the strategic plan, enables development without removing Nf6 (needed for kingside O-O).. Rejected: c6d4, f6e4.
9. Commit Commit cxd4 (c5d4).
11.Nxd4Sonnet
1. Observe Halbzug 11, Weiss am Zug. Phase: Eroeffnung. Schwarz +1 Punkte. Legale Zuege: 42. 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 (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.searxng794ms
- llm.research_summary60036ms · 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 f2-f3 immediately: it blocks Black's advanced d4 pawn from advancing, shores up e4, and closes the a7-g1 diagonal before Black can exploit it. Then Qd2 and castle queenside — the Be3 piece is already…
- llm.plan72250ms · $0.0588
full reasoning
Phase: opening. Play f2-f3 immediately: it blocks Black's advanced d4 pawn from advancing, shores up e4, and closes the a7-g1 diagonal before Black can exploit it. Then Qd2 and castle queenside — the Be3 piece is already in place from the previous plan. Execute the Yugoslav Attack blueprint (Be3 done → f3 → Qd2 → 0-0-0) and convert White's space on the kingside into a pawn storm with g4-g5 once Black castles short, per the Sicilian Dragon structural template cited in source [1]. Critical: Black's d4 pawn is an advanced wedge that could become a passed pawn or restrict the Nc3 — f3 addresses this structurally; Nf6 can jump to g4 at any moment, attacking Be3 and disrupting the Yugoslav setup — f3 closes that option entirely; Both kings are uncastled: White must reach 0-0-0 before Black generates c-file or d-file counterplay with the d4 outpost.
6. Candidates Candidates: Qd2 (Core Yugoslav Attack step: Be3 done, Nf3 done → Qd2 next, enabling 0-0-0 per the blueprint.) | Nxd4 (Removes the advanced d4 wedge directly; plan flags it as passed-pawn and Nc3-restriction threat.) | g4…
- chess.js.legal_moves0ms
- llm.candidates28905ms · $0.0223
full reasoning
Candidates: Qd2 (Core Yugoslav Attack step: Be3 done, Nf3 done → Qd2 next, enabling 0-0-0 per the blueprint.) | Nxd4 (Removes the advanced d4 wedge directly; plan flags it as passed-pawn and Nc3-restriction threat.) | g4 (Launches the Yugoslav kingside pawn storm (g4-g5) called for in the plan once Black castles short.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxd4 — Nf3 occupies f3, making f2-f3 impossible now. Taking d4 eliminates the advanced wedge AND clears f3 for the pawn next move, enabling the proper Yugoslav sequence: f3→Qd2→0-0-0 with Ng4 permanently shut…
- llm.reflect100386ms · $0.0854
full reasoning
Final pick: Nxd4 — Nf3 occupies f3, making f2-f3 impossible now. Taking d4 eliminates the advanced wedge AND clears f3 for the pawn next move, enabling the proper Yugoslav sequence: f3→Qd2→0-0-0 with Ng4 permanently shut out.. Rejected: d1d2, g2g4.
9. Commit Commit Nxd4 (f3d4).
12...e5Haiku
1. Observe Halbzug 12, Schwarz am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 34. Criticality: 0.30.
- 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 research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Secure kingside with Be7 or Be6, castle immediately, prepare c5 pressure to challenge Nd4, and establish c-file control via Rc8 for counterplay. Achieve balanced middlegame with both sides castled and dev…
- llm.plan39735ms · $0.0208
full reasoning
Phase: opening. Secure kingside with Be7 or Be6, castle immediately, prepare c5 pressure to challenge Nd4, and establish c-file control via Rc8 for counterplay. Achieve balanced middlegame with both sides castled and developed. Black contests White's space advantage via c5 pressure and c-file initiative, while safeguarding king and improving piece placement. Critical: Opponent threat: Nd4 pressures Nc6 and threatens Nf5 or Nxc6+. Black must stabilize or counter via c5; Own weakness: Uncastled king is exposed; Bc8 undeveloped. King safety cannot be delayed further; Concrete tactic: c5 break is Black's main lever—pushes Nd4 away, contests space, opens c-file.
6. Candidates Candidates: Nxd4 (Removes White's strong centralized knight, directly addresses Nf5/Nxc6+ threat, simplifies position) | Be6 (Develops bishop, secures kingside against Nf5, enables kingside castling per plan) | e5 (Chall…
- chess.js.legal_moves0ms
- llm.candidates46264ms · $0.0268
full reasoning
Candidates: Nxd4 (Removes White's strong centralized knight, directly addresses Nf5/Nxc6+ threat, simplifies position) | Be6 (Develops bishop, secures kingside against Nf5, enables kingside castling per plan) | e5 (Challenges White's space advantage and e4 pawn, contests center, prepares c5 lever)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e5 — Attacks e4 immediately, forces White's decision, contests center. Strengthens Black's setup for the planned c5 break and c-file control. Sharpest forcing move.. Rejected: c6d4, c8e6.
- llm.reflect21811ms · $0.0082
9. Commit Commit e5 (e7e5).
13.Nxc6Sonnet
1. Observe Halbzug 13, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 45. 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.searxng522ms · fail
5. Plan Phase: opening. Halbzug 13, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 45. Criticality: 0.40. No memory context available. Plan: develop pieces, control the center, castle soon. [LLM-Error: Claude CL…
full reasoning
Phase: opening. Halbzug 13, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 45. Criticality: 0.40. No memory context available. Plan: develop pieces, control the center, castle soon. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Nxc6 (captures n score=3) | Nd5 (centre score=1) | Ndb5 (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: Nxc6 — captures n score=3. Rejected: c3d5, d4b5. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Nxc6 (d4c6).
14...Nxe4Haiku
1. Observe Halbzug 14, Schwarz am Zug. Phase: Eroeffnung. Weiss +3 Punkte. Legale Zuege: 30. Criticality: 0.15.
- 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_search4ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Prioritize kingside castling, develop Be7, challenge Nc6 with a6 next move. Activate remaining pieces for tactics and counterplay. Must contest center with c5 when safe to offset material deficit. Secure …
- llm.plan85062ms · $0.0471
full reasoning
Phase: opening. Prioritize kingside castling, develop Be7, challenge Nc6 with a6 next move. Activate remaining pieces for tactics and counterplay. Must contest center with c5 when safe to offset material deficit. Secure king immediately, activate pieces aggressively, generate counterplay via pawn breaks (c5, a6) and piece activity. Position is objectively difficult; Black must create practical complications and tactical shot sequences. Critical: Uncastled king vulnerable to Nd8 fork or Ne7 tactics; castling is non-negotiable; White's Nc6 outpost is strong; challenge immediately with a6 or circumvent via Be7 reroute; Down one knight; only compensation is through tactics, piece activity, and aggressive play.
6. Candidates Candidates: Nxe4 (Forcing blow: captures pawn with tempo, bishop on e3 under attack. Creates immediate tactical complications.) | d5 (Central break fighting for counterplay. Opens lines, challenges White's center, genera…
- chess.js.legal_moves0ms
- llm.candidates25728ms · $0.0105
full reasoning
Candidates: Nxe4 (Forcing blow: captures pawn with tempo, bishop on e3 under attack. Creates immediate tactical complications.) | d5 (Central break fighting for counterplay. Opens lines, challenges White's center, generates mutual tactics.) | a6 (Directly challenges Nc6 outpost per plan. Forces knight to commit or retreat, disrupts White's compensation.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxe4 — Forcing blow wins pawn, attacks bishop on e3 with tempo. Creates immediate tactical friction and material gain. Best try to generate complications against deficit.. Rejected: d6d5, a7a6.
- llm.reflect27377ms · $0.0133
9. Commit Commit Nxe4 (f6e4).
15.Nxe4Sonnet
1. Observe Halbzug 15, Weiss am Zug. Phase: Eroeffnung. Weiss +2 Punkte. Legale Zuege: 53. 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.searxng463ms · fail
5. Plan Phase: opening. Halbzug 15, Weiss am Zug. Phase: Eroeffnung. Weiss +2 Punkte. Legale Zuege: 53. Criticality: 0.25. No memory context available. Plan: develop pieces, control the center, castle soon. [LLM-Error: Claude CL…
full reasoning
Phase: opening. Halbzug 15, Weiss am Zug. Phase: Eroeffnung. Weiss +2 Punkte. Legale Zuege: 53. Criticality: 0.25. No memory context available. Plan: develop pieces, control the center, castle soon. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Nxe5 (captures p+centre score=4) | Nxe4 (captures n+centre score=4) | Nxa7 (captures p score=3) [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: Nxe4 — Nxe4 eliminates Black's powerful centralized knight; after dxe4 recapture, Ne7+ forks the king forcing king flight, then Nxg8 wins the h8 rook outright — net gain of a full rook.. Rejected: c6e5, c6a7.
- llm.reflect119534ms · $0.1051
9. Commit Commit Nxe4 (c3e4).
16...Qa5+Haiku
1. Observe Halbzug 16, Schwarz am Zug. Phase: Mittelspiel. Weiss +5 Punkte. Legale Zuege: 29. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search13ms
3. Recall Opponent No pattern found for chess-sonnet-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. Castle immediately to remove undefended king from e8, eliminate Ne7+ back-rank tactics, unlock rook. Follow with a6 (attacking Nc6) and c5 (pawn break) to generate counterplay and piece activity. Offse…
- llm.plan54736ms · $0.0274
full reasoning
Phase: middlegame. Castle immediately to remove undefended king from e8, eliminate Ne7+ back-rank tactics, unlock rook. Follow with a6 (attacking Nc6) and c5 (pawn break) to generate counterplay and piece activity. Offset material deficit (down a knight, plus one pawn) by activating rooks on open lines and forcing White's strong knights to retreat via a6 and c5. Build sufficient counterplay to reach drawable endgame. Critical: uncastled king on e8 vulnerable to Ne7+ and tactical back-rank ideas; White's Nc6 outpost blocks Black's counterplay until challenged with a6; Black must create pawn breaks (c5, later a6) and rook activity before White consolidates.
6. Candidates Candidates: bxc6 (Eliminates Nc6 outpost, opens b-file for rook activity, removes key White piece) | Qa5+ (Check forces White response, activates queen with tempo, seizes initiative) | d5 (Central pawn break challenges N…
- chess.js.legal_moves0ms
- llm.candidates28883ms · $0.0165
full reasoning
Candidates: bxc6 (Eliminates Nc6 outpost, opens b-file for rook activity, removes key White piece) | Qa5+ (Check forces White response, activates queen with tempo, seizes initiative) | d5 (Central pawn break challenges Ne4, opens lines for piece activity, creates counterplay)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qa5+ — Forcing check seizes initiative immediately with tempo, forces White to respond to the check before they execute their main threat (Nf6+). Tactical strike.. Rejected: b7c6, d6d5.
- llm.reflect79388ms · $0.0433
9. Commit Commit Qa5+ (d8a5).
17.Nxa5Sonnet
1. Observe Halbzug 17, Weiss am Zug. Phase: Mittelspiel. Weiss +5 Punkte. Legale Zuege: 9. 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.searxng365ms · fail
5. Plan Phase: middlegame. Halbzug 17, Weiss am Zug. Phase: Mittelspiel. Weiss +5 Punkte. Legale Zuege: 9. Schach! Criticality: 0.25. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [L…
full reasoning
Phase: middlegame. Halbzug 17, Weiss am Zug. Phase: Mittelspiel. Weiss +5 Punkte. Legale Zuege: 9. 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: Nxa5 (Captures overextended queen outright; Ra8 blocked by Pa7, no recapture possible — free queen.) | Nb4 (Blocks check on b4 AND attacks queen on a5, forcing it to flee while keeping initiative.) | Nd2 (Blo…
- chess.js.legal_moves0ms
- llm.candidates94462ms · $0.0618
full reasoning
Candidates: Nxa5 (Captures overextended queen outright; Ra8 blocked by Pa7, no recapture possible — free queen.) | Nb4 (Blocks check on b4 AND attacks queen on a5, forcing it to flee while keeping initiative.) | Nd2 (Blocks check on d2, centralizes knight, keeps all pieces coordinated without conceding tempo.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxa5 — Captures the checking queen outright. Pa7 physically blocks Ra8 from recapturing on a5; Bc8 has no diagonal to a5; Bf8 is blocked by pd6. White wins a full queen for a knight with zero compensation.. R…
- llm.reflect44434ms · $0.0345
full reasoning
Final pick: Nxa5 — Captures the checking queen outright. Pa7 physically blocks Ra8 from recapturing on a5; Bc8 has no diagonal to a5; Bf8 is blocked by pd6. White wins a full queen for a knight with zero compensation.. Rejected: c6b4, e4d2.
9. Commit Commit Nxa5 (c6a5).
18...d5Haiku
1. Observe Halbzug 18, Schwarz am Zug. Phase: Mittelspiel. Weiss +14 Punkte. Legale Zuege: 21. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search15ms
3. Recall Opponent No pattern found for chess-sonnet-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. Castle kingside to neutralize Ne7+ fork, connect Rooks, prepare a6/c5 pawn breaks. Trade pieces and activate Rooks; generate counterplay via a6 and c5 to offset knight deficit. Critical: Ne7+ fork thre…
- llm.plan36760ms · $0.0161
full reasoning
Phase: middlegame. Castle kingside to neutralize Ne7+ fork, connect Rooks, prepare a6/c5 pawn breaks. Trade pieces and activate Rooks; generate counterplay via a6 and c5 to offset knight deficit. Critical: Ne7+ fork threat (eliminate via 0-0); d5 outpost and d6 pawn weakness; material deficit requires active piece play.
6. Candidates Candidates: d5 (Attacks Ne4, displaces the knight, opens central lines for Black's pieces, creates counterplay against White's advantage.) | Bd7 (Develops bishop, prevents Ne7+ forking the king and bishop on c8, improves…
- chess.js.legal_moves0ms
- llm.candidates62986ms · $0.0348
full reasoning
Candidates: d5 (Attacks Ne4, displaces the knight, opens central lines for Black's pieces, creates counterplay against White's advantage.) | Bd7 (Develops bishop, prevents Ne7+ forking the king and bishop on c8, improves Black's piece coordination.) | a6 (Attacks Na5, forces the knight to move, prepares b5 pawn break and active queenside play.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d5 — Attacks centralized Ne4, forces it to move (even if Nf6+ with check, King moves and Black's center solidifies). Centralizes Black's presence, opens lines, gains time despite White's tempo.. Rejected: c8d…
- llm.reflect58206ms · $0.0294
full reasoning
Final pick: d5 — Attacks centralized Ne4, forces it to move (even if Nf6+ with check, King moves and Black's center solidifies). Centralizes Black's presence, opens lines, gains time despite White's tempo.. Rejected: c8d7, a7a6.
9. Commit Commit d5 (d6d5).
19.Nd6+Sonnet
1. Observe Halbzug 19, Weiss am Zug. Phase: Mittelspiel. Weiss +14 Punkte. Legale Zuege: 52. 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.searxng269ms · fail
5. Plan Phase: middlegame. Press the exposed Black king on e8 via coordinated knight-queen activity: Na5 ties down b7/a-rook, Ne4 eyeing d6-check, queen activates toward the center or king-side to create decisive threats within …
- llm.plan93819ms · $0.0478
full reasoning
Phase: middlegame. Press the exposed Black king on e8 via coordinated knight-queen activity: Na5 ties down b7/a-rook, Ne4 eyeing d6-check, queen activates toward the center or king-side to create decisive threats within 3-5 moves. Convert the +14 material surplus by activating the queen and rooks against the uncastled Black king while Na5 and Ne4 dominate the board, denying Black any counterplay from the d5/e5 pawn mass. Critical: Black king stranded on e8 — no castling, vulnerable to Nd6+ discovery; Na5 pressures b7 and restricts Ra8; Nxb7 wins a pawn and forks the rooks; Black's d5/e5 pawn duo could advance if White delays — Ne4 blockade is critical; Per Chess.com conversion guide: avoid tactical complications that reduce the material edge.
6. Candidates Candidates: Nd6+ (Forces Black king off e8; plan explicitly names d6-check as key threat exploiting uncastled king.) | Nxb7 (Wins pawn and forks Ra8+Bc8; plan states Nxb7 converts material edge by attacking both rooks.) …
- chess.js.legal_moves0ms
- llm.candidates24233ms · $0.0190
full reasoning
Candidates: Nd6+ (Forces Black king off e8; plan explicitly names d6-check as key threat exploiting uncastled king.) | Nxb7 (Wins pawn and forks Ra8+Bc8; plan states Nxb7 converts material edge by attacking both rooks.) | Qxd5 (Captures central pawn, activates queen toward Black king; plan calls for queen joining knight-queen coordination.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nd6+ — Forces Black king off e8; plan explicitly names d6-check as key threat exploiting uncastled king.. Rejected: a5b7, d1d5. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Nd6+ (e4d6).
20...Bxd6Haiku
1. Observe Halbzug 20, Schwarz am Zug. Phase: Mittelspiel. Weiss +14 Punkte. Legale Zuege: 4. Schach! Criticality: 0.45.
- 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 middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Halbzug 20, Schwarz am Zug. Phase: Mittelspiel. Weiss +14 Punkte. Legale Zuege: 4. Schach! Criticality: 0.45. Memory: 5 position hit(s) + 0 opponent hit(s). Plan: activate pieces, attack weak pawns, ke…
full reasoning
Phase: middlegame. Halbzug 20, Schwarz am Zug. Phase: Mittelspiel. Weiss +14 Punkte. Legale Zuege: 4. Schach! Criticality: 0.45. 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: Bxd6 (Removes checking knight, activates bishop from back rank to strong center square. Tactical cleanout.) | Ke7 (Escapes check safely, keeps king somewhat mobile for middlegame. Passive but solid.) | Kd7 (K…
- chess.js.legal_moves0ms
- llm.candidates24261ms · $0.0091
full reasoning
Candidates: Bxd6 (Removes checking knight, activates bishop from back rank to strong center square. Tactical cleanout.) | Ke7 (Escapes check safely, keeps king somewhat mobile for middlegame. Passive but solid.) | Kd7 (King retreat toward center-adjacent square. Defensive, maintains space slightly better than e7.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxd6 — Removes White's strongest attacker (Nd6) while activating Black's bishop to a commanding center square. Concrete tactical cleanout that reduces White's initiative.. Rejected: e8e7, e8d7.
- llm.reflect17734ms · $0.0069
9. Commit Commit Bxd6 (f8d6).
21.Bc5Sonnet
1. Observe Halbzug 21, Weiss am Zug. Phase: Mittelspiel. Weiss +11 Punkte. Legale Zuege: 45. 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.searxng239ms · fail
5. Plan Phase: middlegame. Halbzug 21, Weiss am Zug. Phase: Mittelspiel. Weiss +11 Punkte. Legale Zuege: 45. Criticality: 0.10. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Err…
full reasoning
Phase: middlegame. Halbzug 21, Weiss am Zug. Phase: Mittelspiel. Weiss +11 Punkte. Legale Zuege: 45. 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: Bc5 (Attacks Bd6, permanently prevents Black castling, coordinates with Na5 — strongest strategic pressure per web research.) | Nxb7 (Wins b7 pawn (knight for bishop+pawn trade); Black must recapture with Bxb…
- chess.js.legal_moves0ms
- llm.candidates113799ms · $0.0650
full reasoning
Candidates: Bc5 (Attacks Bd6, permanently prevents Black castling, coordinates with Na5 — strongest strategic pressure per web research.) | Nxb7 (Wins b7 pawn (knight for bishop+pawn trade); Black must recapture with Bxb7, gaining material while disrupting Black's queenside.) | Qxd5 (Captures central pawn directly; best as follow-up after Bc5/Nxb7, risky alone due to Bb4+ counter per research.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bc5 — Bc5 controls f8 via the c5-f8 diagonal, permanently preventing Black from castling kingside while attacking Bd6 directly. Na5+Bc5 form a coordinated vice on Black's uncastled king — no material concessi…
- llm.reflect95562ms · $0.0536
full reasoning
Final pick: Bc5 — Bc5 controls f8 via the c5-f8 diagonal, permanently preventing Black from castling kingside while attacking Bd6 directly. Na5+Bc5 form a coordinated vice on Black's uncastled king — no material concession required.. Rejected: a5b7, d1d5.
9. Commit Commit Bc5 (e3c5).
22...Bg4Haiku
1. Observe Halbzug 22, Schwarz am Zug. Phase: Mittelspiel. Weiss +11 Punkte. Legale Zuege: 29. 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_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Generate forcing tactical threats against White's centralized king on e1. Coordinate rooks and bishops to create immediate attacking chances and compensation for the material deficit. Down significant …
- llm.plan40218ms · $0.0208
full reasoning
Phase: middlegame. Generate forcing tactical threats against White's centralized king on e1. Coordinate rooks and bishops to create immediate attacking chances and compensation for the material deficit. Down significant material (approximately a queen), conventional strategy is irrelevant. Push for perpetual check, mating threats, or a desperate tactical breakthrough as the sole realistic objective. Critical: Material: down ~9 points (queen equivalent) — position is lost without tactics; White's king on e1 is the only exploitable weakness; Black's Rooks (a8,h8) and Bishops (c8,d6) must immediately coordinate for an attack to generate any practical chances.
6. Candidates Candidates: Bxc5 (Remove White's strong bishop, simplify position, keep rooks for potential back-rank threats vs exposed e1.) | Bg4 (Develop bishop aggressively with tempo; pressures long diagonal, forces White queen to …
- chess.js.legal_moves0ms
- llm.candidates26761ms · $0.0120
full reasoning
Candidates: Bxc5 (Remove White's strong bishop, simplify position, keep rooks for potential back-rank threats vs exposed e1.) | Bg4 (Develop bishop aggressively with tempo; pressures long diagonal, forces White queen to relocate, activates piece toward e1 weakness.) | f5 (Pawn storm opens kingside, threatens f4-e3 ideas, creates mating net around undefended e1 in 2-3 moves.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bg4 — Attacks queen with tempo, forces immediate relocation, activates bishop toward e1 weakness on the long diagonal, maintains maximum tactical pressure in material-down position where forcing play is essen…
- llm.reflect22839ms · $0.0095
full reasoning
Final pick: Bg4 — Attacks queen with tempo, forces immediate relocation, activates bishop toward e1 weakness on the long diagonal, maintains maximum tactical pressure in material-down position where forcing play is essential. Rejected: d6c5, f7f5.
9. Commit Commit Bg4 (c8g4).
23.Qxd5Sonnet
1. Observe Halbzug 23, Weiss am Zug. Phase: Mittelspiel. Weiss +11 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 returned no SearXNG results (empty).
- web_search.searxng573ms · fail
5. Plan Phase: middlegame. Maintain the Na5+Bc5 battery pressure on b7 and f8. Consider Bxd6 to trade the strong Black bishop and damage pawn structure. Neutralize Bg4 by developing Qe2 or Be2. Castle kingside to secure the Whit…
- llm.plan36408ms · $0.0230
full reasoning
Phase: middlegame. Maintain the Na5+Bc5 battery pressure on b7 and f8. Consider Bxd6 to trade the strong Black bishop and damage pawn structure. Neutralize Bg4 by developing Qe2 or Be2. Castle kingside to secure the White king before Black consolidates the d5/e5 center. Convert dominant piece activity (Na5 threatening b7, Bc5 controlling f8/d6) into a structural advantage by forcing Black's king to remain in the center while White castles and activates the dormant Ra1 via the open files. Critical: Black Bg4 pressures f3/d1 diagonal — White has no developed f3-knight to block it, making the queen and king coordination awkward; Na5 is powerful but exposed; if Black plays ...a6 the knight must retreat losing tempo; Black's uncastled king on e8 is the main target — Bc5 covers f8, preventing easy kingside castling; Black's d5/e5 pawn center is a latent strength — if White loses initiative, pawns can advance; No web research block provided — falling back to general principles: in positions with Na5+Bc5 vs uncastled king, maintaining the battery and delaying Black's king safety is the correct strategic priority.
6. Candidates Candidates: Qxd5 (captures p+centre score=4) | Nxb7 (captures p score=3) | Bxa7 (captures p score=3) [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: Qxd5 — captures p+centre score=4. Rejected: a5b7, c5a7. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Qxd5 (d1d5).
24...e4Haiku
1. Observe Halbzug 24, Schwarz am Zug. Phase: Mittelspiel. Weiss +12 Punkte. Legale Zuege: 35. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search15ms
3. Recall Opponent No pattern found for chess-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: middlegame. Create immediate forcing tactics against White's exposed king (e1) via checks, threats, and discovered attacks. Activate rooks (a8, h8) on open/back-rank lines. Coordinate Bd6 and Bg4 to build mating n…
- llm.plan42253ms · $0.0243
full reasoning
Phase: middlegame. Create immediate forcing tactics against White's exposed king (e1) via checks, threats, and discovered attacks. Activate rooks (a8, h8) on open/back-rank lines. Coordinate Bd6 and Bg4 to build mating nets or force perpetual check. Material deficit (~12 pts) means only tactics offer survival. Position is lost materially; Black's sole realistic goal is perpetual check, tactical material recovery, or mate—without constant forcing moves, White consolidates and converts in 3-5 moves. Critical: White's king on e1 is centralized and lacks escape squares—primary tactical target; Black's rooks unactivated on back rank—must reach open/semi-open files or create back-rank threats immediately; Bg4 is active and positioned to coordinate with Bd6 and rooks for discovered checks or mating patterns; Passive or slow moves invite White consolidation—every move must be forcing or prepare imminent tactics.
6. Candidates Candidates: Bxc5 (Captures strong White bishop on c5, removes defender, gains material in losing position.) | e4 (Pawn advances, opens lines, creates central threats, improves Black's cramped position.)
- chess.js.legal_moves0ms
- llm.candidates112377ms · $0.0687
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e4 — Pawn advance toward exposed White king on e1. Creates forcing central pressure, opens bishop/rook lines, maintains tactical chaos. In lost position, passive exchanges (Bxc5) invite consolidation—only for…
- llm.reflect32824ms · $0.0134
full reasoning
Final pick: e4 — Pawn advance toward exposed White king on e1. Creates forcing central pressure, opens bishop/rook lines, maintains tactical chaos. In lost position, passive exchanges (Bxc5) invite consolidation—only forcing play offers perpetual check or tactical compensation.. Rejected: d6c5.
9. Commit Commit e4 (e5e4).
25.Qxf7+Sonnet
1. Observe Halbzug 25, Weiss am Zug. Phase: Mittelspiel. Weiss +12 Punkte. Legale Zuege: 48. 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 position arises from a sharp open game where White has sacrificed material for a powerful initiative — the Na5, Bc5, and Qd5 form an aggressive trident targeting f7 and co…
- web_search.searxng798ms
- llm.research_summary14503ms · $0.0047
full reasoning
Web search (middlegame, SearXNG + summary): This position arises from a sharp open game where White has sacrificed material for a powerful initiative — the Na5, Bc5, and Qd5 form an aggressive trident targeting f7 and controlling key central squares, while Black's king remains uncast…
5. Plan Phase: middlegame. Launch immediate forced attack via Qxf7+ or Bxf7+, dragging Black's king into the center, then castle queenside to activate the Ra1 on the d/e files and deliver a coordinated mating net before Black st…
- llm.plan22740ms · $0.0151
full reasoning
Phase: middlegame. Launch immediate forced attack via Qxf7+ or Bxf7+, dragging Black's king into the center, then castle queenside to activate the Ra1 on the d/e files and deliver a coordinated mating net before Black stabilizes with ...Qd7 or consolidates the e4 pawn. Convert the Na5-Bc5-Qd5 trident's overwhelming piece activity and Black's permanently exposed king into a decisive material or mating advantage via forcing tactics on f7, before the e4 passer or Bg4 neutralize White's initiative. Critical: Black king exposed on e8 — immediate exploitation via Qxf7+ or Bxf7+ is the top priority according to web research (Qxf7+ Kd8 2.0-0-0 launches rook activation and mating threats); Black's e4 pawn is dangerous if White delays — it restricts White's development and could become a passed passer threat; Bg4 pins the d1-diagonal and will become more dangerous if White castles kingside — queenside castling avoids this; Nc6+ fork motif exists after Bxf7+ Ke7 — winning decisive material while Black's rooks on a8/h8 remain idle; Black's only defensive resource is ...Qd7 or ...Bxf3 to create counterplay — White must act before either materializes.
6. Candidates Candidates: Qxf7+ (Plan's top priority: forces king into center, then 0-0-0 activates Ra1 with decisive mating threats.) | Nc6 (Fork motif from plan: attacks b8/b4 squares, threatens Nb8 winning rook while maintaining pi…
- chess.js.legal_moves0ms
- llm.candidates22259ms · $0.0164
full reasoning
Candidates: Qxf7+ (Plan's top priority: forces king into center, then 0-0-0 activates Ra1 with decisive mating threats.) | Nc6 (Fork motif from plan: attacks b8/b4 squares, threatens Nb8 winning rook while maintaining piece activity.) | Qxe4+ (Eliminates dangerous e4 passer with check before it restricts White's development per plan warning.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Qxf7+ — Plan's top priority: forces king into center, then 0-0-0 activates Ra1 with decisive mating threats.. Rejected: a5c6, d5e4. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Qxf7+ (d5f7).
26...Kxf7Haiku
1. Observe Halbzug 26, Schwarz am Zug. Phase: Mittelspiel. Weiss +13 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-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: middlegame. Escape Qf7's mating net via legal King move. Immediately activate Ra8/Rh8 on open/back-rank lines to generate perpetual-check threats. Coordinate Bd6 + Bg4 for forcing sequences against e1. Survival vi…
- llm.plan24233ms · $0.0086
full reasoning
Phase: middlegame. Escape Qf7's mating net via legal King move. Immediately activate Ra8/Rh8 on open/back-rank lines to generate perpetual-check threats. Coordinate Bd6 + Bg4 for forcing sequences against e1. Survival via perpetual check or tactical back-rank mate. Convert King's escape into forcing counterplay; material deficit (-13) means only tactics prevent rapid mate in 3-5 moves. Critical: Qf7 dominates, threatens mate within 2 moves; Ke8 trapped with only 2 legal moves, must relocate; Ra8/Rh8 inactive—desperately need open lines for forcing sequence.
6. Candidates Candidates: Kxf7 (Capture Queen, eliminate mating threat, activate King for forced back-rank tactics) | Kd8 (Escape Queen pressure, reposition King defensively, preserve options for passive resistance)
- chess.js.legal_moves0ms
- llm.candidates22759ms · $0.0101
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxf7 — Eliminate mating threat (Qf7 removed), capture Queen, flip material deficit. King f7 activates rooks on open/back-rank lines for perpetual-check tactics. Kd8 allows Qe8# mate in one.. Rejected: e8d8.
- llm.reflect24883ms · $0.0073
9. Commit Commit Kxf7 (e8f7).
27.Nxb7Sonnet
1. Observe Halbzug 27, Weiss am Zug. Phase: Mittelspiel. Weiss +4 Punkte. Legale Zuege: 32. 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.searxng335ms · fail
5. Plan Phase: middlegame. Halbzug 27, Weiss am Zug. Phase: Mittelspiel. Weiss +4 Punkte. Legale Zuege: 32. Criticality: 0.00. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Erro…
full reasoning
Phase: middlegame. Halbzug 27, Weiss am Zug. Phase: Mittelspiel. Weiss +4 Punkte. Legale Zuege: 32. Criticality: 0.00. 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: Nxb7 (captures p score=3) | Bxa7 (captures p score=3) | Bxd6 (captures b score=3) [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: Nxb7 — captures p score=3. Rejected: c5a7, c5d6. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Nxb7 (a5b7).
28...e3Haiku
1. Observe Halbzug 28, Schwarz am Zug. Phase: Mittelspiel. Weiss +5 Punkte. Legale Zuege: 44. 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. Activate Ra8/Rh8 on back rank or open files to create perpetual-check threats. Advance e4→e3 to weaken f2 and force White's response. Coordinate Bd6+Bg4 to support breakthrough. Convert forcing sequenc…
- llm.plan52750ms · $0.0247
full reasoning
Phase: middlegame. Activate Ra8/Rh8 on back rank or open files to create perpetual-check threats. Advance e4→e3 to weaken f2 and force White's response. Coordinate Bd6+Bg4 to support breakthrough. Convert forcing sequences into drawing chances (perpetual check, tactical tactics) to offset material deficit (White up ~Knight + 2p). Black trades pieces and forces White into tactical concessions (back-rank mate threat, e-pawn promotion threats) to hold despite material imbalance. Critical: Rh1 (Rxh1) removes defender and threatens back-rank tactics; not check due to Bf1 block, but strong consolidation; e3 advance forces f2 decision and opens lines for Bd6/Bg4 to attack e1; Nb7+Bc5 are active but not creating mate-in-2; King f7 has escape squares (Kg6, Ke7 available).
6. Candidates Candidates: e3 (Advances dangerous passed pawn, forces f2 response, opens lines for Bd6/Bg4 coordination per plan) | Bxh2 (Removes kingside defender, threatens back-rank tactics and rook activation, tactical compensation…
- chess.js.legal_moves0ms
- llm.candidates35797ms · $0.0178
full reasoning
Candidates: e3 (Advances dangerous passed pawn, forces f2 response, opens lines for Bd6/Bg4 coordination per plan) | Bxh2 (Removes kingside defender, threatens back-rank tactics and rook activation, tactical compensation) | Be5 (Centralizes bishop, coordinates with e3 advance, maintains tension and perpetual-check potential)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e3 — Pawn advances one square from promotion, forces f2 decision, opens diagonals for Bd6+Bg4 to coordinate attacking e1. Most forcing move given material deficit.. Rejected: d6h2, d6e5.
- llm.reflect32288ms · $0.0160
9. Commit Commit e3 (e4e3).
29.Nxd6+Sonnet
1. Observe Halbzug 29, Weiss am Zug. Phase: Mittelspiel. Weiss +5 Punkte. Legale Zuege: 31. 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: middlegame. Halbzug 29, Weiss am Zug. Phase: Mittelspiel. Weiss +5 Punkte. Legale Zuege: 31. Criticality: 0.00. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Erro…
full reasoning
Phase: middlegame. Halbzug 29, Weiss am Zug. Phase: Mittelspiel. Weiss +5 Punkte. Legale Zuege: 31. Criticality: 0.00. 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: Nxd6+ (Captures bishop with check; according to research, safer than Nd8+ corner-knight trap risk; maintains initiative.) | fxe3 (Eliminates Black's dangerous passed pawn on e3 before it promotes or causes ba…
- chess.js.legal_moves0ms
- llm.candidates91943ms · $0.0433
full reasoning
Candidates: Nxd6+ (Captures bishop with check; according to research, safer than Nd8+ corner-knight trap risk; maintains initiative.) | fxe3 (Eliminates Black's dangerous passed pawn on e3 before it promotes or causes back-rank threats.) | Bc4+ (Activates sleeping bishop with check, drives Black king back, fits plan of piece activation and initiative.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nxd6+ — Captures bishop with check; according to research, safer than Nd8+ corner-knight trap risk; maintains initiative.. Rejected: f2e3, f1c4. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Nxd6+ (b7d6).
30...Kf6Haiku
1. Observe Halbzug 30, Schwarz am Zug. Phase: Mittelspiel. Weiss +8 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_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. Escape check via King move (Kg6/Kf6 preferred). Then push e3–e2 to threaten e1=Q, activate Ra8/Rh8 on open files, coordinate Bg4+bishops to create perpetual-check or tactical tactics. Trade pieces wher…
- llm.plan96991ms · $0.0564
full reasoning
Phase: middlegame. Escape check via King move (Kg6/Kf6 preferred). Then push e3–e2 to threaten e1=Q, activate Ra8/Rh8 on open files, coordinate Bg4+bishops to create perpetual-check or tactical tactics. Trade pieces where possible. Convert material deficit into drawing chances (perpetual check or tactical fortress) by activating pieces and forcing White into defensive complications. Critical: Black King in check from Nd6 on f7 — must move (Ke6/Kf6/Kg6/Kg8); Nd6 is a strong outpost; Black should harass or exchange it; pe3 is advanced and threatening e1=Q promotion — push to e2 next turn; Ra8/Rh8 inactive on back rank — need activation on semi-open a-, h-, or central files; Bg4 is active and pins/attacks f2 — coordinate with rook tactics.
6. Candidates Candidates: Kg6 (Centralizes King toward board center; enables e3-e2 push next turn. Resists passive back rank. Fits plan.) | Kf6 (Aggressive King placement, maximum piece coordination. Supports e-pawn promotion threat a…
- chess.js.legal_moves0ms
- llm.candidates34866ms · $0.0144
full reasoning
Candidates: Kg6 (Centralizes King toward board center; enables e3-e2 push next turn. Resists passive back rank. Fits plan.) | Kf6 (Aggressive King placement, maximum piece coordination. Supports e-pawn promotion threat and tactical complications.) | Ke6 (Centralizes, bridges defensive and tactical approaches. Maintains flexibility for e-pawn advance and rook activation.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kf6 — Kf6 directly protects e3-pawn, enables e2 promotion threat. Maximizes coordination of Bg4+rooks for perpetual-check tactics. Most aggressive defense of material deficit.. Rejected: f7g6, f7e6.
- llm.reflect21430ms · $0.0081
9. Commit Commit Kf6 (f7f6).
31.Ne4+Sonnet
1. Observe Halbzug 31, Weiss am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 35. Criticality: 0.20.
- 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.searxng326ms · fail
5. Plan Phase: middlegame. Exploit the dominant Nd6 to fork Black's two rooks via Ne8, while using Queenside castling (O-O-O) to secure the White king against the e3 passer and activate Rd1 on the queening file. Nd6 + Bc5 create…
- llm.plan112260ms · $0.0700
full reasoning
Phase: middlegame. Exploit the dominant Nd6 to fork Black's two rooks via Ne8, while using Queenside castling (O-O-O) to secure the White king against the e3 passer and activate Rd1 on the queening file. Nd6 + Bc5 create a coordinate net against the exposed Kf6. Convert the +8 material advantage and dominant piece activity (Nd6 outpost + active Bc5) into a decisive win by winning a rook via the Ne8 fork, neutralizing Black's only counterplay — the e3 passer — through queenside castling and rook control of the e-file. Critical: Black's e3 pawn threatens …e2 and …e1=Q within 2 moves — highest priority threat; Ne8 forks Ra8 and Rh8 but Black will respond with …e2; must sequence correctly; White king on e1 is exposed to the passer — O-O-O brings king to c1 and Rd1 to d1 controlling the promotion path; Black's Bg4 is active and could support passer advance or create back-rank complications.
6. Candidates Candidates: Ne4+ (check+centre score=3) | Bxa7 (captures p score=3) | Bd4+ (check+centre score=3) [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: Ne4+ — check+centre score=3. Rejected: c5a7, c5d4. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Ne4+ (d6e4).
32...Kg6Haiku
1. Observe Halbzug 32, Schwarz am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 5. Schach! Criticality: 0.55. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search17ms
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: middlegame. Escape check safely (Kg6 preferred). Push e3–e2 next, threatening e1=Q. Activate Rooks on semi-open files to create perpetual-check threats and force piece trades to reduce White's material advantage. …
- llm.plan45774ms · $0.0224
full reasoning
Phase: middlegame. Escape check safely (Kg6 preferred). Push e3–e2 next, threatening e1=Q. Activate Rooks on semi-open files to create perpetual-check threats and force piece trades to reduce White's material advantage. Black must convert the advanced e3 pawn and Rook activity into perpetual check or tactical complications to hold a draw despite White's +8 material superiority. Critical: White's Nd6+ or further King pressure threatens catastrophe; Black's e3 pawn is the only lifeline—must advance to e2 to threaten e1=Q; Rook activation on a-file and h-file is critical to create practical drawing chances.
6. Candidates Candidates: Kg6 (Safe King escape to kingside. Enables e3-e2 pawn push next, threatening e1=Q.) | Ke5 (Centralizes King, attacks Knight on e4. Maintains e3-e2 pawn advance plan.) | Kf7 (Solid King retreat preserving e3-e…
- chess.js.legal_moves0ms
- llm.candidates75733ms · $0.0444
full reasoning
Candidates: Kg6 (Safe King escape to kingside. Enables e3-e2 pawn push next, threatening e1=Q.) | Ke5 (Centralizes King, attacks Knight on e4. Maintains e3-e2 pawn advance plan.) | Kf7 (Solid King retreat preserving e3-e2 pawn threat and Rook activation options.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kg6 — Kg6 escapes King to kingside safety, enables e3-e2 push next (threatening e1=Q), keeps f-file open for Rook activation. Plan explicitly prefers Kg6 for safe escape, which is critical with -8 material de…
- llm.reflect30890ms · $0.0152
full reasoning
Final pick: Kg6 — Kg6 escapes King to kingside safety, enables e3-e2 push next (threatening e1=Q), keeps f-file open for Rook activation. Plan explicitly prefers Kg6 for safe escape, which is critical with -8 material deficit.. Rejected: f6e5, f6f7.
9. Commit Commit Kg6 (f6g6).
33.Nf6Sonnet
1. Observe Halbzug 33, Weiss am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 36. Criticality: 0.20.
- 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.searxng232ms · fail
5. Plan Phase: middlegame. Halbzug 33, Weiss am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 36. Criticality: 0.20. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Erro…
full reasoning
Phase: middlegame. Halbzug 33, Weiss am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 36. Criticality: 0.20. 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: Nf6 (Check on exposed Kg6; according to Chess.com, attack an exposed king immediately with piece threats and double attacks.) | Bxe3 (Eliminates dangerous e3 passer; Chess.com warns premature passed pawns los…
- chess.js.legal_moves0ms
- llm.candidates84270ms · $0.0524
full reasoning
Candidates: Nf6 (Check on exposed Kg6; according to Chess.com, attack an exposed king immediately with piece threats and double attacks.) | Bxe3 (Eliminates dangerous e3 passer; Chess.com warns premature passed pawns lose impact when king is exposed — neutralize it now.) | Bxa7 (Wins weak a7 pawn and forks Ra8; activates bishop per plan, attacks weak pawns, maintains material edge.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf6 — Check forces Kg6 to move, plants the knight on dominant f6 outpost right next to the black king, then Bxe3 next turn eliminates the e3 passer — achieves both goals with tempo gain.. Rejected: c5e3, c5a7…
- llm.reflect56738ms · $0.0475
full reasoning
Final pick: Nf6 — Check forces Kg6 to move, plants the knight on dominant f6 outpost right next to the black king, then Bxe3 next turn eliminates the e3 passer — achieves both goals with tempo gain.. Rejected: c5e3, c5a7.
9. Commit Commit Nf6 (e4f6).
34...exf2+Haiku
1. Observe Halbzug 34, Schwarz am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 33. 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. Advance e3–e2 threatening e1=Q; activate rooks on semi-open a/h-files to create perpetual-check threats; force piece trades to mitigate White's +8 material advantage. Convert the advanced e3 pawn and a…
- llm.plan26802ms · $0.0136
full reasoning
Phase: middlegame. Advance e3–e2 threatening e1=Q; activate rooks on semi-open a/h-files to create perpetual-check threats; force piece trades to mitigate White's +8 material advantage. Convert the advanced e3 pawn and activated rooks into perpetual check or forced simplification to achieve a draw despite the massive material deficit. Critical: Nf6 can jump to d5/e4/h5 creating tactical threats; Bc5 controls long diagonal; White's material advantage is decisive if Black fails to generate continuous tactical pressure; Rooks on a8/h8 not yet optimally placed; king on g6 exposed to knight checks; bishop on g4 passive; critical structures underdeveloped; e3–e2 forcing e1=Q is the only real compensation; timing Ra and Rh activation to create back-rank/perpetual threats is non-negotiable.
6. Candidates Candidates: exf2+ (Checks king, advances e-pawn toward e1=Q, forces White response gaining tempo) | e2 (Threatens e1=Q immediately, forces White response to main pawn compensation) | Rae8 (Activates rook on e-file suppor…
- chess.js.legal_moves0ms
- llm.candidates50261ms · $0.0278
full reasoning
Candidates: exf2+ (Checks king, advances e-pawn toward e1=Q, forces White response gaining tempo) | e2 (Threatens e1=Q immediately, forces White response to main pawn compensation) | Rae8 (Activates rook on e-file supporting e1=Q threat, enables back-rank tactics)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: exf2+ — Check forces Kf1, then e2+ gains double tempo. Most forcing sequence maximizes pressure and preserves promotion threat while removing f2 defender.. Rejected: e3e2, a8e8.
- llm.reflect34787ms · $0.0152
9. Commit Commit exf2+ (e3f2).
35.Kxf2Sonnet
1. Observe Halbzug 35, Weiss am Zug. Phase: Mittelspiel. Weiss +7 Punkte. Legale Zuege: 3. 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.searxng366ms · fail
5. Plan Phase: middlegame. Halbzug 35, Weiss am Zug. Phase: Mittelspiel. Weiss +7 Punkte. Legale Zuege: 3. Schach! Criticality: 0.55. No memory context available. Plan: activate pieces, attack weak pawns, keep the initiative. [L…
full reasoning
Phase: middlegame. Halbzug 35, Weiss am Zug. Phase: Mittelspiel. Weiss +7 Punkte. Legale Zuege: 3. Schach! Criticality: 0.55. 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 (Captures the dangerous f2 pawn with bishop, resolves check safely, king stays on e1.) | Kxf2 (King captures checking pawn directly, eliminates promotion threat, activates king in winning endgame.) | Kd2…
- chess.js.legal_moves0ms
- llm.candidates56743ms · $0.0455
full reasoning
Candidates: Bxf2 (Captures the dangerous f2 pawn with bishop, resolves check safely, king stays on e1.) | Kxf2 (King captures checking pawn directly, eliminates promotion threat, activates king in winning endgame.) | Kd2 (Evades check but leaves f2 pawn alive; Black promotes f2xf1=Q, surrendering White's material edge.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxf2 — King captures f2, eliminating promotion threat while keeping the powerful c5 bishop intact on its dominant diagonal. The g4 bishop does not attack f2 (different diagonal), so the king is safe. Web rese…
- llm.reflect106868ms · $0.0730
full reasoning
Final pick: Kxf2 — King captures f2, eliminating promotion threat while keeping the powerful c5 bishop intact on its dominant diagonal. The g4 bishop does not attack f2 (different diagonal), so the king is safe. Web research confirms: with +7 material, king centralization is correct.. Rejected: c5f2, e1d2.
9. Commit Commit Kxf2 (e1f2).
36...Be2Haiku
1. Observe Halbzug 36, Schwarz am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 31. 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_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate bishop via Be2+ forcing king movement; unleash rooks on a/h-files for perpetual-check motifs; exchange pieces aggressively to shrink White's advantage and reach defensible endgame. Sacrifice e…
- llm.plan37777ms · $0.0153
full reasoning
Phase: middlegame. Activate bishop via Be2+ forcing king movement; unleash rooks on a/h-files for perpetual-check motifs; exchange pieces aggressively to shrink White's advantage and reach defensible endgame. Sacrifice exchange if necessary to eliminate attacking pieces; convert rook activity + bishop checks into fortress where Black's three pawns + two rooks resist White's knight/bishops. Critical: White knight Nf6 dominates kingside — threatens Kg6 with checks; Rooks Ra8/Rh8 dormant — must activate immediately; Be2+ is forcing and best try for tempo; Material deficit demands perpetual threats or White wins.
6. Candidates Candidates: Be2 (Activates bishop centrally, threatens infiltration, forces White king repositioning for tempo) | Rab8 (Unleashes dormant a-rook, prepares perpetual-check motifs, activates for tactical threats) | gxf6 (E…
- chess.js.legal_moves0ms
- llm.candidates47746ms · $0.0255
full reasoning
Candidates: Be2 (Activates bishop centrally, threatens infiltration, forces White king repositioning for tempo) | Rab8 (Unleashes dormant a-rook, prepares perpetual-check motifs, activates for tactical threats) | gxf6 (Eliminates dominant Nf6, reduces kingside attack, exchanges pieces aggressively per plan)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Be2 — Forcing check gains tempo immediately; centralizes bishop for infiltration; forces White king repositioning; enables rook activation next move per plan's tempo-based strategy.. Rejected: a8b8, g7f6.
- llm.reflect26229ms · $0.0122
9. Commit Commit Be2 (g4e2).
37.Kxe2Sonnet
1. Observe Halbzug 37, Weiss am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 38. Criticality: 0.20.
- 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.searxng561ms · fail
5. Plan Phase: middlegame. Neutralize the Black bishop on e2 (Kxe2 or king sidestep), then activate both rooks — Rh1 toward h7/7th rank, Ra1 toward a-file — while Nf6+Bc5 maintain the king-attack matrix around g6, aiming for dec…
- llm.plan87268ms · $0.0566
full reasoning
Phase: middlegame. Neutralize the Black bishop on e2 (Kxe2 or king sidestep), then activate both rooks — Rh1 toward h7/7th rank, Ra1 toward a-file — while Nf6+Bc5 maintain the king-attack matrix around g6, aiming for decisive penetration. Convert overwhelming material via rook penetration to the 7th rank (targeting a7 and g7 pawns) while the dominant Nf6 keeps the Black king boxed on g6, forcing checkmate or winning the remaining Black rooks through zugzwang-style piece coordination. Critical: Black Bc2 on e2 directly attacks White Bf1 and sits adjacent to Kf2 — must be captured or king must vacate f2 immediately; Nf6 attacks h7 pawn directly; if rook reaches h-file, h7 falls and king shelter collapses; Black Ra8/Rh8 are passive but could activate if White allows tempo loss — no unnecessary slow moves.
6. Candidates Candidates: Kxe2 (Eliminates dangerous Black bishop on e2 attacking Bf1; plan demands immediate neutralization of this threat.) | Nxh7 (Captures h7 pawn directly, collapses Black king shelter on g6, opens h-file for rook…
- chess.js.legal_moves0ms
- llm.candidates21403ms · $0.0168
full reasoning
Candidates: Kxe2 (Eliminates dangerous Black bishop on e2 attacking Bf1; plan demands immediate neutralization of this threat.) | Nxh7 (Captures h7 pawn directly, collapses Black king shelter on g6, opens h-file for rook penetration.) | Bxa7 (Wins a7 pawn converting material advantage; passive Black Ra8 cannot defend in time.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxe2 — According to Chess.com's undefended-piece lesson, exploiting a free piece is the highest-priority tactic. Be2 is completely undefended; Kxe2 wins a full bishop for nothing, decisively increasing White'…
- llm.reflect73878ms · $0.0500
full reasoning
Final pick: Kxe2 — According to Chess.com's undefended-piece lesson, exploiting a free piece is the highest-priority tactic. Be2 is completely undefended; Kxe2 wins a full bishop for nothing, decisively increasing White's material lead.. Rejected: f6h7, c5a7.
9. Commit Commit Kxe2 (f2e2).
38...gxf6Haiku
1. Observe Halbzug 38, Schwarz am Zug. Phase: Mittelspiel. Weiss +11 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_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: middlegame. Activate rooks via Rh1+ forcing king, follow with Ra3+ for dual checks on 1st/3rd ranks. Establish perpetual-check pattern and fortress-posture to compensate for material deficit and neutralize Nh5+ th…
- llm.plan34743ms · $0.0163
full reasoning
Phase: middlegame. Activate rooks via Rh1+ forcing king, follow with Ra3+ for dual checks on 1st/3rd ranks. Establish perpetual-check pattern and fortress-posture to compensate for material deficit and neutralize Nh5+ threats. Consolidate rooks on a-file and back rank to create perpetual check motifs and defensive fortress that repels White knight/bishop attacks while holding the three pawns. Critical: Nh5+ is immediate check threat forcing Kg5/Kf5; Ra8 and Rh8 dormant—must activate immediately via Rh1+ then Ra3+; Perpetual check or locked endgame fortress is Black's only realistic outcome given White's +11 material advantage.
6. Candidates Candidates: Rae8+ (Activates a-rook with check, forces king move, initiates perpetual-check pattern on e-file matching plan.) | Rhe8+ (Activates h-rook with check, doubles rook pressure on e-file, alternative forcing con…
- chess.js.legal_moves0ms
- llm.candidates45271ms · $0.0259
full reasoning
Candidates: Rae8+ (Activates a-rook with check, forces king move, initiates perpetual-check pattern on e-file matching plan.) | Rhe8+ (Activates h-rook with check, doubles rook pressure on e-file, alternative forcing continuation toward perpetual.) | gxf6 (Removes dangerous Nf6 knight, eliminates Nh5+ threat, allows consolidation toward fortress defense.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: gxf6 — Eliminates the dangerous Nf6 knight, removes the Nh5+ check threat immediately, clears the board for clean rook activation next move without disruption.. Rejected: a8e8, h8e8.
- llm.reflect39345ms · $0.0190
9. Commit Commit gxf6 (g7f6).
39.Bd4Sonnet
1. Observe Halbzug 39, Weiss am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 33. 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.searxng439ms · fail
5. Plan Phase: middlegame. Penetrate the 7th rank immediately with at least one rook (targeting a7 or h7), activate Bf1 to join Bc5 in a bishop-pair diagonal net around the Black king on g6, and advance Ke2 toward d3-d4 to escor…
- llm.plan83488ms · $0.0498
full reasoning
Phase: middlegame. Penetrate the 7th rank immediately with at least one rook (targeting a7 or h7), activate Bf1 to join Bc5 in a bishop-pair diagonal net around the Black king on g6, and advance Ke2 toward d3-d4 to escort the queenside pawn majority forward within 3-5 moves. Convert the +8 material surplus by doubling rooks on the 7th rank — per the 7th-rank penetration principle, this attacks both flank pawns simultaneously while Bc5 cuts off king escape diagonals, forcing Black into a passive rook defense that collapses once a second rook joins or a pawn promotes. Critical: Black rooks on a8/h8 can contest 7th-rank invasion — White must time penetration so both rooks cannot simultaneously guard a7 and h7; f6 pawn shelters Kg6 from direct frontal attack — bypassing via a7/h7 is safer than forcing f6; Bf1 is currently undeveloped and idle — activating it toward d3 or the a6-f1 diagonal sharpens the bishop-pair net before king advances.
6. Candidates Candidates: Bxa7 (captures p score=3) | Bd4 (centre score=1) | Bb6 (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: Bd4 — Bd4 centralizes AND directly attacks f6 along the d4-h8 diagonal, threatening Bxf6+ next move — the pawn sheltering Kg6. Forces Black into passive defense without hanging a piece.. Rejected: c5a7, c5b6.
- llm.reflect49771ms · $0.0351
9. Commit Commit Bd4 (c5d4).
40...Rae8+Haiku
1. Observe Halbzug 40, Schwarz am Zug. Phase: Mittelspiel. Weiss +8 Punkte. Legale Zuege: 23. 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: middlegame. Awaken dormant rooks (a8, h8) via forcing checks on the first and a-files. Create perpetual-check motifs on a-file and back rank to establish defensive fortress and strangle White's material advantage.…
- llm.plan28712ms · $0.0131
full reasoning
Phase: middlegame. Awaken dormant rooks (a8, h8) via forcing checks on the first and a-files. Create perpetual-check motifs on a-file and back rank to establish defensive fortress and strangle White's material advantage. Compensate for -8 material deficit through two-rook fortress with perpetual-check patterns rather than winning attack; render White's bishops and extra pawn dormant via constant rook pressure. Critical: Black rooks completely passive (a8, h8); White bishop d4 is active and centralized—immediately force rook activation or White consolidates control; White king on e2 is vulnerable to checking sequence starting on first rank; this is the forcing lever to dictate play and prevent White consolidation; Realistic endgame is fortress-draw via perpetual check, not a win—material deficit (-8) is too large; goal is to lock the position, not break through.
6. Candidates Candidates: Rae8+ (Forcing check activates a-rook for perpetual-check fortress motif on e-file and back rank.) | Rhe8+ (Forcing check awakens h-rook, threatens perpetual check, locks White king for defensive fortress.) |…
- chess.js.legal_moves0ms
- llm.candidates61242ms · $0.0377
full reasoning
Candidates: Rae8+ (Forcing check activates a-rook for perpetual-check fortress motif on e-file and back rank.) | Rhe8+ (Forcing check awakens h-rook, threatens perpetual check, locks White king for defensive fortress.) | Rab8 (Develops a-rook on b-file for fortress support and rook coordination if checks fail.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rae8+ — Activates the most dormant rook (a8) with a forcing check. Establishes perpetual-check motif on e-file and back rank; enables Rhe8 follow-up for dual-rook fortress coordination.. Rejected: h8e8, a8b8.
- llm.reflect27272ms · $0.0124
9. Commit Commit Rae8+ (a8e8).
41.Kd3Sonnet
1. Observe Halbzug 41, Weiss am Zug. Phase: Endspiel. Weiss +8 Punkte. Legale Zuege: 7. Schach! Criticality: 0.35.
- 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): White holds a commanding material advantage — two bishops and two rooks versus Black's two rooks — plus a queenside pawn majority (a2-b2-c2) against only three scattered Black paw…
- web_search.searxng790ms
- llm.research_summary33737ms · $0.0254
full reasoning
Web search (endgame, SearXNG + summary): White holds a commanding material advantage — two bishops and two rooks versus Black's two rooks — plus a queenside pawn majority (a2-b2-c2) against only three scattered Black pawns. This is not a named opening structure but a classic heavy…
5. Plan Phase: endgame. Centralize king to d3, contest the e-file with at least one rook to neutralize Re8 counterplay, reposition Bf1 to the c4 or b5 diagonal, then launch the queenside majority with c3-c4. Per the web research…
- llm.plan24264ms · $0.0154
full reasoning
Phase: endgame. Centralize king to d3, contest the e-file with at least one rook to neutralize Re8 counterplay, reposition Bf1 to the c4 or b5 diagonal, then launch the queenside majority with c3-c4. Per the web research, an active king in heavy-piece endings accelerates conversion; passive kings let the defender trade into fortress-like rook endings. Convert the bishop-pair and two-rook advantage into an unstoppable passed queenside pawn by marching the king to d4, doubling rooks on an open central file to neutralize Black's rooks, and rolling a2-b2-c2 forward with bishop support until promotion becomes trivial. Critical: Re8 controls the e-file and can generate back-rank nuisances — must be challenged before king march exposes White's rear; Bf1 is completely idle on the back rank and gives Black a free tempo every move it stays passive; Black's f6-pawn and g6-king are compact — rook invasions via e7 or d7 must be timed before Black's king shuttles to f5 and contests central space.
6. Candidates Candidates: Kd3 (Directly executes the plan's first directive: centralize king to d3, first step toward d4 march.) | Be5 (Activates idle bishop aggressively; controls e-file approach and supports queenside pawn advance.)…
- chess.js.legal_moves0ms
- llm.candidates22815ms · $0.0176
full reasoning
Candidates: Kd3 (Directly executes the plan's first directive: centralize king to d3, first step toward d4 march.) | Be5 (Activates idle bishop aggressively; controls e-file approach and supports queenside pawn advance.) | Be3 (Repositions passive d4-bishop toward c5/b6 diagonal, freeing king path and supporting c3-c4 push.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd3 — Directly executes the plan's first directive: centralize king to d3, first step toward d4 march.. Rejected: d4e5, d4e3. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Kd3 (e2d3).
42...Re3+Haiku
1. Observe Halbzug 42, Schwarz am Zug. Phase: Endspiel. Weiss +8 Punkte. Legale Zuege: 26. Criticality: 0.10. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_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. Activate rooks from e8 and h8 to create perpetual-check threats on back rank and a-file. Force White king to defend against constant tactical pressure. Establish fortress rather than seeking counterplay. …
- llm.plan30798ms · $0.0155
full reasoning
Phase: endgame. Activate rooks from e8 and h8 to create perpetual-check threats on back rank and a-file. Force White king to defend against constant tactical pressure. Establish fortress rather than seeking counterplay. Force draw through perpetual-check fortress, nullifying White's material advantage via constant rook threats. Critical: White bishop d4 is centralized and dominant; if unpressured, pawn majority becomes unstoppable; Black rooks are passive—must activate immediately or position collapses into zugzwang; Black king g6 exposed; White king d3 controls center and supports bishop-pawn coordination.
6. Candidates Candidates: Re3+ (Check forces king move, activates rook immediately for perpetual-check threats) | Re5 (Centralizes rook on 5th rank, prepares coordination with h8 rook for fortress) | Re4 (Aggressively places rook, pre…
- chess.js.legal_moves0ms
- llm.candidates14362ms · $0.0068
full reasoning
Candidates: Re3+ (Check forces king move, activates rook immediately for perpetual-check threats) | Re5 (Centralizes rook on 5th rank, prepares coordination with h8 rook for fortress) | Re4 (Aggressively places rook, pressures bishop d4, controls critical central fortress squares)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Re3+ — Check forces king move, activates rook immediately with tempo. Creates perpetual-check threats on back rank. Forces White defense, establishes fortress.. Rejected: e8e5, e8e4.
- llm.reflect14873ms · $0.0053
9. Commit Commit Re3+ (e8e3).
43.Kxe3Sonnet
1. Observe Halbzug 43, Weiss am Zug. Phase: Endspiel. Weiss +8 Punkte. Legale Zuege: 4. 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.searxng511ms · fail
5. Plan Phase: endgame. Halbzug 43, Weiss am Zug. Phase: Endspiel. Weiss +8 Punkte. Legale Zuege: 4. Schach! Criticality: 0.55. No memory context available. Plan: activate the king, create passed pawns, defend prophylactically. …
full reasoning
Phase: endgame. Halbzug 43, Weiss am Zug. Phase: Endspiel. Weiss +8 Punkte. Legale Zuege: 4. Schach! Criticality: 0.55. 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: Bxe3 (Captures the checking rook for a bishop, gaining +2 material; eliminates Black's sole active piece per research-cited 'dominate the rook' principle.) | Kxe3 (King captures the rook and centralises on e3…
- chess.js.legal_moves0ms
- llm.candidates72330ms · $0.0475
full reasoning
Candidates: Bxe3 (Captures the checking rook for a bishop, gaining +2 material; eliminates Black's sole active piece per research-cited 'dominate the rook' principle.) | Kxe3 (King captures the rook and centralises on e3, directly fulfilling the 'activate the king' plan to escort passed pawns.) | Kc4 (King steps toward queenside pawn mass, activating for passed-pawn creation, though leaves Re3 temporarily alive.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxe3 — King captures the rook for free (net +5 points, zero cost), centralises on e3 to escort the queenside pawn majority, and eliminates Black's only active piece — perfectly fulfilling 'activate the king, …
- llm.reflect32791ms · $0.0262
full reasoning
Final pick: Kxe3 — King captures the rook for free (net +5 points, zero cost), centralises on e3 to escort the queenside pawn majority, and eliminates Black's only active piece — perfectly fulfilling 'activate the king, create passed pawns'.. Rejected: d4e3, d3c4.
9. Commit Commit Kxe3 (d3e3).
44...Re8+Haiku
1. Observe Halbzug 44, Schwarz am Zug. Phase: Endspiel. Weiss +13 Punkte. Legale Zuege: 18. 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: endgame. Activate rook with tempo-gaining checks to disrupt White's pawn coordination. Establish perpetual-check fortress preventing a/b/c pawn breakthrough. Black's single asset (rook activity + king position) mu…
- llm.plan38739ms · $0.0199
full reasoning
Phase: endgame. Activate rook with tempo-gaining checks to disrupt White's pawn coordination. Establish perpetual-check fortress preventing a/b/c pawn breakthrough. Black's single asset (rook activity + king position) must compensate for material deficit via constant tactical pressure. Material is lost (+13 White). Only realistic outcome: perpetual-check fortress. Rook must control back rank and escape files indefinitely, forcing White king into defensive posture while preventing coordinated pawn advance and bishop support. Critical: Opponent threat: White's a/b/c pawn trio (each 2 moves from promotion) coordinated by centralized bishop-d4. If Black rook passive, pawn breakthrough unstoppable in 4–6 moves.; Own weakness: King g6 exposed to tactical checks (e.g., Rh3-type lines, Bc5+). Must preserve escape squares (f5, g5, g7) to avoid zugzwang collapse.; Concrete tactical threat: White executes Ra1 advance + Rh1 coordination or Bc5+ to drive Black king toward edge, forcing loss of tempo or defensive pawn..
6. Candidates Candidates: Re8+ (Tempo-gaining check forces king move, disrupts White's pawn coordination. Rook activates on e-file.) | Rf8 (Positions rook for back-rank control and perpetual-check fortress. Maintains escape lines agai…
- chess.js.legal_moves0ms
- llm.candidates16753ms · $0.0075
full reasoning
Candidates: Re8+ (Tempo-gaining check forces king move, disrupts White's pawn coordination. Rook activates on e-file.) | Rf8 (Positions rook for back-rank control and perpetual-check fortress. Maintains escape lines against Bc5+.) | Rg8 (Centralizes rook, controls critical files. Prevents bishop-king coordination threatening a/b/c pawn breakthrough.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Re8+ — Check forces king move, disrupts pawn coordination. Rook activates on central e-file where it can deliver perpetual checks from multiple squares (e3, e2, e4 depending on king flight). Maintains tempo a…
- llm.reflect34332ms · $0.0149
full reasoning
Final pick: Re8+ — Check forces king move, disrupts pawn coordination. Rook activates on central e-file where it can deliver perpetual checks from multiple squares (e3, e2, e4 depending on king flight). Maintains tempo and initiative.. Rejected: h8f8, h8g8.
9. Commit Commit Re8+ (h8e8).
45.Be5Sonnet
1. Observe Halbzug 45, Weiss am Zug. Phase: Endspiel. Weiss +13 Punkte. Legale Zuege: 6. Schach! Criticality: 0.35.
- 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.searxng365ms · fail
5. Plan Phase: endgame. Halbzug 45, Weiss am Zug. Phase: Endspiel. Weiss +13 Punkte. Legale Zuege: 6. Schach! Criticality: 0.35. No memory context available. Plan: activate the king, create passed pawns, defend prophylactically.…
full reasoning
Phase: endgame. Halbzug 45, Weiss am Zug. Phase: Endspiel. Weiss +13 Punkte. Legale Zuege: 6. Schach! Criticality: 0.35. 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: Kf4 (King activation toward f6 pawn; classic 'king first' endgame principle per Silman/Dvoretsky.) | Be5 (Bishop attacks f6 pawn directly, dominates center; strong follow-up to king activation.) | Kf3 (King c…
- chess.js.legal_moves0ms
- llm.candidates63796ms · $0.0260
full reasoning
Candidates: Kf4 (King activation toward f6 pawn; classic 'king first' endgame principle per Silman/Dvoretsky.) | Be5 (Bishop attacks f6 pawn directly, dominates center; strong follow-up to king activation.) | Kf3 (King centralizes toward kingside, supports passed pawn creation without overextending.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Be5 — Interposes the rook check on e5 while simultaneously attacking f6 — two objectives in one move. If Rxe5, white recaptures with a rook (gaining material). King activates to f4 next regardless. No web res…
- llm.reflect115809ms · $0.0675
full reasoning
Final pick: Be5 — Interposes the rook check on e5 while simultaneously attacking f6 — two objectives in one move. If Rxe5, white recaptures with a rook (gaining material). King activates to f4 next regardless. No web result specific enough; general endgame principle: answer check with counter-threat.. Rejected: e3f4, e3f3.
9. Commit Commit Be5 (d4e5).
46...Rxe5+Haiku
1. Observe Halbzug 46, Schwarz am Zug. Phase: Endspiel. Weiss +13 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_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. Activate rook with tempo-gaining checks to disrupt White's a/b/c pawn coordination. Keep rook on e-file/back rank to maintain perpetual-check threat. Force White king defensive. Apply Philidor principle (…
- llm.plan35220ms · $0.0171
full reasoning
Phase: endgame. Activate rook with tempo-gaining checks to disrupt White's a/b/c pawn coordination. Keep rook on e-file/back rank to maintain perpetual-check threat. Force White king defensive. Apply Philidor principle (3rd rank blockade) if pawns reach 6th rank. Goal: draw by threefold repetition. Black's -13 material deficit is insurmountable; only realistic outcome is draw by perpetual check or fortress via rook activity preventing coordinated pawn breakthrough. Critical: White's a/b/c pawn trio advancing (2-3 moves to promotion zone), two rooks + two bishops coordinating support; Black's rook is sole defensive asset; must control e-file and maintain back-rank escape to force perpetual checks; White bishop e5 controls d4/f4/d6/f6 (key squares); White king e3 vulnerable to rook checks along e-file.
6. Candidates Candidates: Rxe5+ (Removes bishop with tempo check. Disrupts White's pawn support network. Forcing move advances perpetual-check plan.) | Rf8 (Back-rank rook activates fortress. Prepares f-file checks against centralized…
- chess.js.legal_moves0ms
- llm.candidates18731ms · $0.0076
full reasoning
Candidates: Rxe5+ (Removes bishop with tempo check. Disrupts White's pawn support network. Forcing move advances perpetual-check plan.) | Rf8 (Back-rank rook activates fortress. Prepares f-file checks against centralized White king. Maintains perpetual-check threat per plan.) | Re7 (Centralizes rook on e-file targeting White king e3. Preserves check threats while controlling critical file for draw fortress.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rxe5+ — Forcing check removes White's controlling bishop on key squares (d4/f6). Simplifies fortress, eliminates pawn support. Preserves perpetual-check threat.. Rejected: e8f8, e8e7.
- llm.reflect19274ms · $0.0076
9. Commit Commit Rxe5+ (e8e5).
47.Kf4Sonnet
1. Observe Halbzug 47, Weiss am Zug. Phase: Endspiel. Weiss +10 Punkte. Legale Zuege: 6. Schach! Criticality: 0.35.
- 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.searxng604ms · fail
5. Plan Phase: endgame. Escape the rook check on e3 by stepping the king to f3 or f4, then immediately activate the two dormant rooks (a1, h1) and bishop (f1) to neutralize Black's lone active rook on e5 and cut off the black ki…
- llm.plan77289ms · $0.0473
full reasoning
Phase: endgame. Escape the rook check on e3 by stepping the king to f3 or f4, then immediately activate the two dormant rooks (a1, h1) and bishop (f1) to neutralize Black's lone active rook on e5 and cut off the black king on g6. Convert a crushing material surplus (rook + bishop ahead) by activating all sleeping White pieces — according to Chess.com rook-endgame guidance, 'rook activity is the key'; White's two idle rooks are the only reason this isn't already over. Critical: Black rook on e5 gives check and commands both the e-file and the 5th rank — must escape without walking into a fork or skewer; White's rooks on a1 and h1 plus bishop on f1 are completely passive; per MasterClass endgame guide, winning requires steadily improving piece activity until the defender runs out of resources; Queenside pawn majority (a2/b2/c2 vs a7) is a long-term passed-pawn battery once rooks are connected and bishop is active.
6. Candidates Candidates: Kf4 (Escapes check and attacks Black's rook on e5 diagonally, gaining tempo per plan's f3/f4 priority.) | Kd4 (Escapes check while diagonally attacking the e5 rook; centralizes king to support pawn majority.)…
- chess.js.legal_moves0ms
- llm.candidates27461ms · $0.0185
full reasoning
Candidates: Kf4 (Escapes check and attacks Black's rook on e5 diagonally, gaining tempo per plan's f3/f4 priority.) | Kd4 (Escapes check while diagonally attacking the e5 rook; centralizes king to support pawn majority.) | Kf3 (Safe check escape near f1 bishop; prepares rook/bishop coordination as plan requires.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kf4 — Escapes check and attacks Black's rook on e5 diagonally, gaining tempo per plan's f3/f4 priority.. Rejected: e3d4, e3f3. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Kf4 (e3f4).
48...Re4+Haiku
1. Observe Halbzug 48, Schwarz am Zug. Phase: Endspiel. Weiss +10 Punkte. Legale Zuege: 23. 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. Activate rook with tempo-gaining checks (Re4+, Re1) to force White king away from pawn cluster. Apply Philidor blockade: keep rook on 3rd rank while pawns below 6th rank, shift to 1st rank for back-rank c…
- llm.plan40273ms · $0.0207
full reasoning
Phase: endgame. Activate rook with tempo-gaining checks (Re4+, Re1) to force White king away from pawn cluster. Apply Philidor blockade: keep rook on 3rd rank while pawns below 6th rank, shift to 1st rank for back-rank checks once pawns reach 6th. Maintain perpetual-check threat. Hold fortress via rook perpetual checks and mobility, preventing coordinated pawn breakthrough; force threefold repetition or perpetual check, as material deficit (down R+B+3P) is mathematically insurmountable. Critical: White a/b/c pawns advance to 5th-6th rank in 2–3 moves; implement Philidor defense (3rd-rank blockade switching to back-rank checks) to prevent breakthrough; White's rooks and bishop coordinate pawn support; maintain rook flexibility across e-file and back rank to deliver checks and disrupt pawn advancement sequences; Black king on g6 must remain flexible (g6/h6/f7) to support rook defense if needed; avoid rook entrapment or back-rank tactics that allow White to consolidate.
6. Candidates Candidates: Re4+ (Tempo-gaining check forces White king away, disrupts pawn-support coordination per plan) | Rf5+ (Aggressive check maintains rook pressure and flexibility for perpetual-check threats) | Re1 (Transitions …
- chess.js.legal_moves0ms
- llm.candidates28254ms · $0.0155
full reasoning
Candidates: Re4+ (Tempo-gaining check forces White king away, disrupts pawn-support coordination per plan) | Rf5+ (Aggressive check maintains rook pressure and flexibility for perpetual-check threats) | Re1 (Transitions to back-rank for perpetual checks as pawns advance, supports Philidor blockade phase)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Re4+ — Tempo-gaining check forces White King away from pawn cluster, activates rook toward 4th-rank blockade per Philidor. Directly disrupts pawn-support coordination.. Rejected: e5f5, e5e1.
- llm.reflect25776ms · $0.0116
9. Commit Commit Re4+ (e5e4).
49.Kxe4Sonnet
1. Observe Halbzug 49, Weiss am Zug. Phase: Endspiel. Weiss +10 Punkte. Legale Zuege: 3. 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.searxng496ms · fail
5. Plan Phase: endgame. Resolve the forced check from the rook on e4 — verify whether the rook is undefended (black king on g6 is two ranks away; f6 pawn covers e5/g5, not e4), and if so capture it outright. If escaping instead,…
- llm.plan94769ms · $0.0706
full reasoning
Phase: endgame. Resolve the forced check from the rook on e4 — verify whether the rook is undefended (black king on g6 is two ranks away; f6 pawn covers e5/g5, not e4), and if so capture it outright. If escaping instead, step to a square the rook cannot follow, then immediately unleash the two idle White rooks to dominate open files. According to Chess.com's rook endgame guide, 'if your rook is more active than your opponent's, use it to create problems and win material or time' — White must flip this dynamic by first neutralizing Black's lone active rook (e4), then activating the dormant pair on a1/h1 and the bishop on f1 to escort the queenside pawn majority to promotion against a helpless black king. Critical: Black rook on e4 delivers check — only 3 legal replies exist, so this move is fully forced; Black king on g6 controls f5 and g5 — those king-escape squares are illegal; safe candidates are f3 and g3 (or direct capture on e4); e4 appears undefended: g6-king is not adjacent, f6-pawn attacks e5/g5 only — capturing the rook may win material immediately; White's rooks on a1/h1 and bishop on f1 are completely passive; once check is resolved, activating all three pieces is the decisive conversion step.
6. Candidates Candidates: Kxe4 (Rook on e4 is undefended: g6-king too far, f6-pawn covers e5/g5 only. Wins rook immediately.) | Kg3 (Escapes check to g3; rook cannot follow without losing tempo, then activate a1/h1 rooks.) | Kf3 (Esca…
- chess.js.legal_moves0ms
- llm.candidates16261ms · $0.0107
full reasoning
Candidates: Kxe4 (Rook on e4 is undefended: g6-king too far, f6-pawn covers e5/g5 only. Wins rook immediately.) | Kg3 (Escapes check to g3; rook cannot follow without losing tempo, then activate a1/h1 rooks.) | Kf3 (Escapes check centrally; maintains king near queenside pawn majority for endgame escort.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxe4 — The rook on e4 is undefended: g6-king controls f5/f7/g5/g7/h5/h6/h7 — NOT e4; f6-pawn attacks e7/g7 only. Capturing wins a full rook immediately, leaving White two rooks + bishop vs bare king and pawns…
- llm.reflect20757ms · $0.0148
full reasoning
Final pick: Kxe4 — The rook on e4 is undefended: g6-king controls f5/f7/g5/g7/h5/h6/h7 — NOT e4; f6-pawn attacks e7/g7 only. Capturing wins a full rook immediately, leaving White two rooks + bishop vs bare king and pawns.. Rejected: f4g3, f4f3.
9. Commit Commit Kxe4 (f4e4).
50...f5+Haiku
1. Observe Halbzug 50, Schwarz am Zug. Phase: Endspiel. Weiss +15 Punkte. Legale Zuege: 10. 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: endgame. Position King on 3rd-rank or key central squares to blockade White's advancing a/b/c pawns; maintain control of promotion squares; force breakthrough to fail through positional stranglehold. Defensive for…
- llm.plan44266ms · $0.0238
full reasoning
Phase: endgame. Position King on 3rd-rank or key central squares to blockade White's advancing a/b/c pawns; maintain control of promotion squares; force breakthrough to fail through positional stranglehold. Defensive fortress: place King to blockade White's multi-pawn advance (Philidor principle adapted for King-only). No counter-attack possible. Draw = preventing promotion via positional control; seek 50-move threshold or stalemate. Critical: White a/b/c pawns reach 5th-6th rank in 2-3 moves if unobstructed; Black King must seize blockade squares (c3/d3 or c4/d4 zone); f6 pawn is vulnerable; sacrifice if it aids King mobility; Stalemate requires King restricted AND White pawns immobilized together.
6. Candidates Candidates: f5+ (Forcing check; sacrifices f-pawn to unlock King mobility toward blockade squares c3/d3) | a6 (Advances passed pawn methodically; maintains queenside counterplay while King repositions westward) | a5 (Two…
- chess.js.legal_moves0ms
- llm.candidates32724ms · $0.0159
full reasoning
Candidates: f5+ (Forcing check; sacrifices f-pawn to unlock King mobility toward blockade squares c3/d3) | a6 (Advances passed pawn methodically; maintains queenside counterplay while King repositions westward) | a5 (Two-square advance creates passed-pawn threat immediately; forces White to address queenside tempo)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: f5+ — Forcing check sacrifices vulnerable f-pawn to unlock King mobility toward blockade squares c3/d3. White King must respond to check; Black King then marches westward decisively.. Rejected: a7a6, a7a5.
- llm.reflect19900ms · $0.0083
9. Commit Commit f5+ (f6f5).
51.Ke5Sonnet
1. Observe Halbzug 51, Weiss am Zug. Phase: Endspiel. Weiss +15 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.searxng490ms · fail
5. Plan Phase: endgame. Halbzug 51, Weiss am Zug. Phase: Endspiel. Weiss +15 Punkte. Legale Zuege: 7. Schach! Criticality: 0.25. No memory context available. Plan: activate the king, create passed pawns, defend prophylactically.…
full reasoning
Phase: endgame. Halbzug 51, Weiss am Zug. Phase: Endspiel. Weiss +15 Punkte. Legale Zuege: 7. Schach! Criticality: 0.25. 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: Ke5 (No useful web result, falling back to general principles. King directly attacks f5 pawn, most aggressive activation toward key target.) | Kf4 (King approaches f5 from kingside, restricts Black king mobil…
- chess.js.legal_moves0ms
- llm.candidates26813ms · $0.0154
full reasoning
Candidates: Ke5 (No useful web result, falling back to general principles. King directly attacks f5 pawn, most aggressive activation toward key target.) | Kf4 (King approaches f5 from kingside, restricts Black king mobility and targets the advanced f-pawn.) | Kd5 (Centralizes king toward queenside passed pawn creation; supports c2-c4-c5 advance against Black's a7.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke5 — Ke5 directly attacks f5 and dominates the center, cutting Black's king from d5/d6/e6/f6. If Black advances f4, Kxf4 wins the pawn; if Kf6, White's king sits on a dominating e5 post while rooks and bisho…
- llm.reflect63907ms · $0.0532
full reasoning
Final pick: Ke5 — Ke5 directly attacks f5 and dominates the center, cutting Black's king from d5/d6/e6/f6. If Black advances f4, Kxf4 wins the pawn; if Kf6, White's king sits on a dominating e5 post while rooks and bishop convert the huge material edge.. Rejected: e4f4, e4d5.
9. Commit Commit Ke5 (e4e5).
52...f4Haiku
1. Observe Halbzug 52, Schwarz am Zug. Phase: Endspiel. Weiss +15 Punkte. Legale Zuege: 10. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_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: endgame. Rush King to blockade White's a/b/c pawn advance via c3 or d3 square. Activate f5 pawn to f4 as a tempo-gainer. Aim for fortress on 3rd rank; force 50-move rule. Philidor blockade: King to c3 after White …
- llm.plan28231ms · $0.0122
full reasoning
Phase: endgame. Rush King to blockade White's a/b/c pawn advance via c3 or d3 square. Activate f5 pawn to f4 as a tempo-gainer. Aim for fortress on 3rd rank; force 50-move rule. Philidor blockade: King to c3 after White pushes a/b/c pawns to 4th rank; tie down Rooks and Bishop while f-pawn acts as distraction. Critical: White will push a2-a4 and b2-b4 next moves; Black King must reach c3 within 2-3 moves before pawns consolidate on 5th rank.; f5-f4 is the only counterplay; forces White to address it, buying time for King to reach blockade squares.; No tactical tricks available; King blockade is the ONLY defensive resource. One misplaced move allows pawn breakthrough..
6. Candidates Candidates: f4 (Only counterplay available. Forces White to address f-pawn, buying critical time for King blockade rush.) | Kf7 (Initiates King march toward blockade square c3 via e6-d5-c4 within 4-5 moves before queensi…
- chess.js.legal_moves0ms
- llm.candidates24263ms · $0.0104
full reasoning
Candidates: f4 (Only counterplay available. Forces White to address f-pawn, buying critical time for King blockade rush.) | Kf7 (Initiates King march toward blockade square c3 via e6-d5-c4 within 4-5 moves before queenside pawns consolidate.) | a5 (Restricts White's b4 advance, controls key queenside square, prevents pawn separation that weakens blockade setup.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: f4 — f4 forces White to respond to passed pawn threat, buying critical tempo for King march to c3 blockade before queenside pawns consolidate on 5th rank.. Rejected: g6f7, a7a5.
- llm.reflect20741ms · $0.0080
9. Commit Commit f4 (f5f4).
53.Kxf4Sonnet
1. Observe Halbzug 53, Weiss am Zug. Phase: Endspiel. Weiss +15 Punkte. Legale Zuege: 26. 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.searxng342ms · fail
5. Plan Phase: endgame. Neutralize Black's only active counter-threat — the advanced f4 pawn — by capturing it with the centralized king. Then connect and activate both rooks on open files, advance the queenside pawn trio (a2-b2…
- llm.plan102824ms · $0.0669
full reasoning
Phase: endgame. Neutralize Black's only active counter-threat — the advanced f4 pawn — by capturing it with the centralized king. Then connect and activate both rooks on open files, advance the queenside pawn trio (a2-b2-c2) to create multiple passed pawns the lone black king cannot stop. Convert a +15 material lead (2 rooks + bishop vs. 3 scattered pawns) by eliminating the f4 pawn immediately, deploying rooks to cut off the black king from the queenside, and marching the pawn majority into unstoppable passers under rook escort. Critical: Black f4 pawn sits on a dark square — White's light-squared bishop cannot blockade it directly, so the king on e5 must capture it; f4-f3-f2 would be a promotion threat if ignored; Black king on g6 is active and can march toward White's undefended g2/h2 pawns — rooks must cut it off laterally per northtexaschessacademy.com: 'cutting off from a file or rank is the heartbeat of winning rook endings'; White must avoid pawn-grabbing tempos that allow Black king to infiltrate the queenside and create stalemate traps or pawn forks.
6. Candidates Candidates: Kxf4 (Eliminates the f4 passer immediately; king captures the only Black counter-threat before it advances.) | Bd3+ (Check drives Black king back, gains tempo to coordinate rooks on open files for queenside a…
- chess.js.legal_moves0ms
- llm.candidates8928ms · $0.0035
full reasoning
Candidates: Kxf4 (Eliminates the f4 passer immediately; king captures the only Black counter-threat before it advances.) | Bd3+ (Check drives Black king back, gains tempo to coordinate rooks on open files for queenside advance.) | Ke4 (Centralizes king to control f4 and d4, preparing to escort queenside pawns forward under rook cover.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxf4 — Eliminates the f4 passer immediately; king captures the only Black counter-threat before it advances.. Rejected: f1d3, e5e4. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Kxf4 (e5f4).
54...Kf6Haiku
1. Observe Halbzug 54, Schwarz am Zug. Phase: Endspiel. Weiss +16 Punkte. Legale Zuege: 9. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent No pattern found for chess-sonnet-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. Activate King to c3 blockade square within 2 moves. White's queenside pawns (a,b,c) will advance soon; Black must tie them down before consolidation on 5th rank. h7 pawn remains silent. Philidor-style res…
- llm.plan22208ms · $0.0085
full reasoning
Phase: endgame. Activate King to c3 blockade square within 2 moves. White's queenside pawns (a,b,c) will advance soon; Black must tie them down before consolidation on 5th rank. h7 pawn remains silent. Philidor-style resistance: King blockades, force slow play, seek 50-move rule or fortress. Blockade White's queenside majority on 3rd rank. Trade material opportunistically. Force White into grinding pace with tied-down pieces. Critical: White a2-a4 + b2-b4 push likely next; Black King must reach c3 in ≤2 moves; No tactics—pure positional attrition; h7 pawn cannot race; static defense only.
6. Candidates Candidates: Kf6 (Activates King march toward c3 blockade. Necessary first step to restrict White's queenside majority before pawn consolidation.) | a5 (Stops immediate a4 break. Provides defensive control of queenside; f…
- chess.js.legal_moves0ms
- llm.candidates96885ms · $0.0573
full reasoning
Candidates: Kf6 (Activates King march toward c3 blockade. Necessary first step to restrict White's queenside majority before pawn consolidation.) | a5 (Stops immediate a4 break. Provides defensive control of queenside; forces White to address pawn tension before advancing.) | a6 (Defends a-pawn, slower defense. Maintains flexible structure while supporting King's blockade setup via time investment.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kf6 — Initiates King march toward c3 blockade in Move 1 of critical 2-move window. a5 delays King activation by full move. Kf6 forces White into grinding pace with tied-down queenside majority.. Rejected: a7a…
- llm.reflect21856ms · $0.0083
full reasoning
Final pick: Kf6 — Initiates King march toward c3 blockade in Move 1 of critical 2-move window. a5 delays King activation by full move. Kf6 forces White into grinding pace with tied-down queenside majority.. Rejected: a7a5, a7a6.
9. Commit Commit Kf6 (g6f6).
55.Rd1Sonnet
1. Observe Halbzug 55, Weiss am Zug. Phase: Endspiel. Weiss +16 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.searxng335ms · fail
5. Plan Phase: endgame. Activate both dormant rooks from a1/h1 onto open files immediately. Push the c2-b2-a2 queenside pawn trio to create multiple connected passed pawns. Deploy the bishop on the long diagonal to support pawn …
- llm.plan56250ms · $0.0330
full reasoning
Phase: endgame. Activate both dormant rooks from a1/h1 onto open files immediately. Push the c2-b2-a2 queenside pawn trio to create multiple connected passed pawns. Deploy the bishop on the long diagonal to support pawn advances. Cut the black king off from the queenside with a rook on the c- or d-file. Convert the +16 material lead by activating the completely passive rook pair (still on starting squares), marching the queenside pawn trio into unstoppable passers under rook escort, while the lone black king on f6 cannot cover both flanks simultaneously. Critical: Both White rooks on a1/h1 are completely undeveloped — according to TheChessWorld's rook endgame guide, 'a passive rook is a decisive liability'; this must be corrected immediately; Black king on f6 is well-centralized and must be driven back or cut off before queenside pawns advance; Black's a7 and h7 pawns are not dangerous yet but could become distractions if rooks remain passive; White bishop on f1 is also idle — needs diagonal activation to support pawn chain or restrict black king.
6. Candidates Candidates: Rd1 (Activates dormant rook on open d-file, cuts black king off from queenside per plan's rook-activation priority.) | Bd3 (Deploys idle bishop onto active diagonal, supports queenside pawn advances as the pl…
- chess.js.legal_moves0ms
- llm.candidates23388ms · $0.0186
full reasoning
Candidates: Rd1 (Activates dormant rook on open d-file, cuts black king off from queenside per plan's rook-activation priority.) | Bd3 (Deploys idle bishop onto active diagonal, supports queenside pawn advances as the plan demands.) | c4 (Launches the queenside pawn trio march to create connected passed pawns under rook escort.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rd1 — Immediately activates the dormant rook on the open d-file, threatening Rd6+ next move to cut the black king off the queenside. Fixes the 'passive rook = decisive liability' problem while enabling the pa…
- llm.reflect38762ms · $0.0308
full reasoning
Final pick: Rd1 — Immediately activates the dormant rook on the open d-file, threatening Rd6+ next move to cut the black king off the queenside. Fixes the 'passive rook = decisive liability' problem while enabling the pawn march under rook escort.. Rejected: f1d3, c2c4.
9. Commit Commit Rd1 (a1d1).
56...Ke6Haiku
1. Observe Halbzug 56, Schwarz am Zug. Phase: Endspiel. Weiss +16 Punkte. Legale Zuege: 9. Criticality: 0.00. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search15ms
3. Recall Opponent No pattern found for chess-sonnet-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. Advance King to c3 blockade square within 2 moves to anchor against White's queenside pawn majority (a2/b2/c2). Establish Philidor-style fortress on 3rd–4th rank, immobilize White's connected pawns, and f…
- llm.plan30377ms · $0.0126
full reasoning
Phase: endgame. Advance King to c3 blockade square within 2 moves to anchor against White's queenside pawn majority (a2/b2/c2). Establish Philidor-style fortress on 3rd–4th rank, immobilize White's connected pawns, and force grinding attrition toward 50-move draw. Static positional defense via blockade on c3; trade material opportunistically; maintain opposition; grind White into zugzwang. Material loss is overwhelming—only fortress holds. Seek repetition or 50-move rule. Tactics unavailable. Critical: White's a/b/c pawn majority will advance a4/b4/c4 imminently; blockade must establish before 4th-rank consolidation.; Black King must reach c3 within 2 moves or be cut off by Rook barriers (Rd3, Rd5, Rc1); timing is critical.; h7 and a7 pawns are frozen; neither can support blockade or distract; h7 cannot race; a7 cannot advance.; Zugzwang risk: Black's King has limited squares; forced moves (h6, h5, a6) trigger unhindered White pawn advance.; Blockade maintenance is absolute; any breach in c3 garrison permits passed pawns—Rooks and Bishop must stay tied to fortress..
6. Candidates Candidates: Ke6 (Direct advance toward c3 blockade square. One file left, optimal path to establish fortress on 3rd rank.) | Ke7 (Flexible move toward queenside blockade. Preserves King mobility while avoiding White King…
- chess.js.legal_moves0ms
- llm.candidates39284ms · $0.0209
full reasoning
Candidates: Ke6 (Direct advance toward c3 blockade square. One file left, optimal path to establish fortress on 3rd rank.) | Ke7 (Flexible move toward queenside blockade. Preserves King mobility while avoiding White King's central control sphere.) | Kf7 (Maintains lateral flexibility. Avoids zugzwang pawn moves (a6/h6 trigger White advance). Positions for next queenside pivot.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke6 — Direct diagonal advance toward c3 blockade. One file left. After Kd5–c4–c3, fortress locks before White pawns consolidate on 4th rank.. Rejected: f6e7, f6f7.
- llm.reflect35775ms · $0.0175
9. Commit Commit Ke6 (f6e6).
57.Bc4+Sonnet
1. Observe Halbzug 57, Weiss am Zug. Phase: Endspiel. Weiss +16 Punkte. Legale Zuege: 33. 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.searxng290ms · fail
5. Plan Phase: endgame. Activate the dormant h1 rook to the a-file or c-file to escort the queenside pawn trio forward. Use the d1 rook to cut the black king horizontally on the 7th rank (Rd7), preventing it from crossing to the…
- llm.plan75515ms · $0.0408
full reasoning
Phase: endgame. Activate the dormant h1 rook to the a-file or c-file to escort the queenside pawn trio forward. Use the d1 rook to cut the black king horizontally on the 7th rank (Rd7), preventing it from crossing to the queenside. March c2-c4, b2-b4, a2-a4 as connected passers. Bishop f1-e2-d3 covers the advance diagonally. According to the Chess.com endgame lesson cited above — 'cutting off from a file or rank is the heartbeat of winning rook endings' — White should park one rook on the 7th rank to horizontally banish the black king, then use the second rook to escort the unstoppable a-b-c pawn trio to promotion while the bishop controls the long diagonal, converting the +16 material lead before Black's lone h7 pawn can become a nuisance. Critical: Black's sole counterplay is the h7-h5-h4 sprint; one rook can neutralize this trivially; White king on f4 already cuts black king from moving south, restricting it to e6-f6-g6 band; The d1 rook is the only currently active piece — h1 rook must be mobilized immediately via the open h-file or swung to the a-file; Bishop on f1 is completely passive — must reach d3 or c4 to support the pawn march before pawns block its own diagonal.
6. Candidates Candidates: Rd7 (Cuts black king on 7th rank, core plan idea: 'parking one rook on 7th rank horizontally banishes the black king'.) | Bd3 (Activates the passive bishop to d3, plan's prescribed f1-e2-d3 route to support q…
- chess.js.legal_moves0ms
- llm.candidates23732ms · $0.0185
full reasoning
Candidates: Rd7 (Cuts black king on 7th rank, core plan idea: 'parking one rook on 7th rank horizontally banishes the black king'.) | Bd3 (Activates the passive bishop to d3, plan's prescribed f1-e2-d3 route to support queenside pawn march.) | Bc4+ (Immediate bishop activation with check to c4, gains tempo while fulfilling plan's diagonal coverage of pawn advance.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bc4+ — Check forces the king off e6 immediately, gaining a free tempo. Bishop lands on c4 controlling d5 (denying king that blockading square) and supporting the a2-b2-c2 pawn march. After Ke7, Rd7+ follows, …
- llm.reflect107269ms · $0.0679
full reasoning
Final pick: Bc4+ — Check forces the king off e6 immediately, gaining a free tempo. Bishop lands on c4 controlling d5 (denying king that blockading square) and supporting the a2-b2-c2 pawn march. After Ke7, Rd7+ follows, displacing the king with a double-tempo strike before h7-h5 counterplay can begin.. Rejected: d1d7, f1d3.
9. Commit Commit Bc4+ (f1c4).
58...Ke7Haiku
1. Observe Halbzug 58, Schwarz am Zug. Phase: Endspiel. Weiss +16 Punkte. Legale Zuege: 2. Schach! Criticality: 0.45. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent No pattern found for chess-sonnet-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. Escape check by advancing king (Kd7/Kd6/Ke7), then push toward c3 blockade square within next 2 moves. Anchor fortress against queenside pawn majority before a4/b4/c4 advance consolidates. Execute blockad…
- llm.plan53796ms · $0.0300
full reasoning
Phase: endgame. Escape check by advancing king (Kd7/Kd6/Ke7), then push toward c3 blockade square within next 2 moves. Anchor fortress against queenside pawn majority before a4/b4/c4 advance consolidates. Execute blockade fortress on c3 to immobilize White's connected a/b/c pawns, grind toward 50-move draw via zugzwang and opposition—only viable survival strategy given +16 material deficit. Critical: White's a2/b2/c2 pawns threaten breakthrough (a4→b4→c4) if not blockaded immediately; Black in check; must escape first before executing blockade. King mobility critical.; Fortress defense is the sole remaining resource. Without c3 control, White's pawn advance converts overwhelming material into a quick win..
6. Candidates Candidates: Ke7 (Escapes check, centralizes toward c3 blockade square. Enables fortress defense on queenside immediately.) | Kf6 (Escapes check but deviates kingside-ward, lengthening route to c3 fortress blockade.)
- chess.js.legal_moves0ms
- llm.candidates40248ms · $0.0202
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke7 — Escapes check while centralizing King toward queenside defense. Positions for immediate fortress setup; Kf6 deviates kingside-ward, delaying c3 blockade and compromising fortress geometry.. Rejected: e6…
- llm.reflect38954ms · $0.0195
full reasoning
Final pick: Ke7 — Escapes check while centralizing King toward queenside defense. Positions for immediate fortress setup; Kf6 deviates kingside-ward, delaying c3 blockade and compromising fortress geometry.. Rejected: e6f6.
9. Commit Commit Ke7 (e6e7).
59.Rd7+Sonnet
1. Observe Halbzug 59, Weiss am Zug. Phase: Endspiel. Weiss +16 Punkte. Legale Zuege: 43. 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.searxng518ms · fail
5. Plan Phase: endgame. Plant one rook on d7 to horizontally cut the black king from the 7th rank (bicycle-pedal principle: one rook denies a rank, the other escorts). Swing Rh1 to b1 or c1, then march the a-b-c pawn trio forwar…
- llm.plan52750ms · $0.0325
full reasoning
Phase: endgame. Plant one rook on d7 to horizontally cut the black king from the 7th rank (bicycle-pedal principle: one rook denies a rank, the other escorts). Swing Rh1 to b1 or c1, then march the a-b-c pawn trio forward in formation. Bishop on c4 guards the d5 blockade square the black king needs to reach the queenside. Convert the decisive material advantage by confining the black king to the kingside via a 7th-rank cut-off, then promote one of the connected a-b-c passed pawns under double-rook escort before Black's lone king can create any counterplay. Critical: Black king on e7 must not slip to d6/c5 — that is the only blockade square; bishop on c4 already covers d5, king on f4 can step to e5 if needed; Black's a7 pawn is a non-threat as long as White does not allow the black king to reach b6; Rh1 transfer to the a-file neutralises it; According to ChessKid.com rules of double-rook endgames, one rook cuts the rank while the second advances material — Rd7 fulfils the cutting role; Rh1 becomes the escort rook.
6. Candidates Candidates: Rd7+ (Cuts black king off the 7th rank (bicycle-pedal principle), forcing king back while escort rook follows.) | Rb1 (Repositions rook to b-file to escort b-pawn advance and neutralise black's a7 pawn threat…
- chess.js.legal_moves0ms
- llm.candidates9270ms · $0.0036
full reasoning
Candidates: Rd7+ (Cuts black king off the 7th rank (bicycle-pedal principle), forcing king back while escort rook follows.) | Rb1 (Repositions rook to b-file to escort b-pawn advance and neutralise black's a7 pawn threat.) | Ke5 (King centralises to e5, blocking black king from reaching d6/c5 blockade square as plan requires.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rd7+ — Rd7+ cuts the black king on two axes simultaneously: the entire 7th rank (c7-b7-a7) AND the d-file downward (d6, d5). King cannot reach the critical d6/c5 blockade squares. After Ke8/Kf6/Kf8, Rh1 becom…
- llm.reflect83785ms · $0.0447
full reasoning
Final pick: Rd7+ — Rd7+ cuts the black king on two axes simultaneously: the entire 7th rank (c7-b7-a7) AND the d-file downward (d6, d5). King cannot reach the critical d6/c5 blockade squares. After Ke8/Kf6/Kf8, Rh1 becomes the escort rook and the a-b-c trio marches freely.. Rejected: d1b1, f4e5.
9. Commit Commit Rd7+ (d1d7).
60...Kxd7Haiku
1. Observe Halbzug 60, Schwarz am Zug. Phase: Endspiel. Weiss +16 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_search11ms
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. Escape check immediately, push King toward c3 blockade within 3 moves. Prevent a4-b4-c4 breakthrough—Black's fortress crumbles if those pawns roll. Blockade c3 with opposition play, grind toward zugzwang …
- llm.plan44236ms · $0.0183
full reasoning
Phase: endgame. Escape check immediately, push King toward c3 blockade within 3 moves. Prevent a4-b4-c4 breakthrough—Black's fortress crumbles if those pawns roll. Blockade c3 with opposition play, grind toward zugzwang and 50-move draw. Fortress technique is the only weapon against -16 material. Critical: In check—move is forced, no time for contemplation; a4-b4-c4 pawn storm is White's only winning try; blockade c3 is Black's only defense; Opposition and Philidor positioning are make-or-break; technique determines survival.
6. Candidates Candidates: Kxd7 (Captures Rook, reduces material deficit. Only tactical shot in fortress endgame; material desperately needed.) | Ke8 (Escapes check, centralizes for opposition. Preps c3 blockade with King positioning; …
- chess.js.legal_moves0ms
- llm.candidates15401ms · $0.0061
full reasoning
Candidates: Kxd7 (Captures Rook, reduces material deficit. Only tactical shot in fortress endgame; material desperately needed.) | Ke8 (Escapes check, centralizes for opposition. Preps c3 blockade with King positioning; Philidor technique.) | Kf8 (Escapes check toward back rank. Less active than Ke8; maintains fortress but surrenders center control.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxd7 — Capture the checking Rook. Reduces material deficit (-5 points). Only tactic available in fortress. After Rhd1+, King remains active toward c3 blockade.. Rejected: e7e8, e7f8.
- llm.reflect52859ms · $0.0270
9. Commit Commit Kxd7 (e7d7).
61.Rd1+Sonnet
1. Observe Halbzug 61, Weiss am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 34. 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.searxng381ms · fail
5. Plan Phase: endgame. Swing Rh1 to d1, then to d7+ forcing the Black king off the 7th rank. Once the king is confined to e8/f8/e6, march the connected a-b-c pawn trio forward under king and bishop escort. Bishop on c4 seals d5…
- llm.plan69894ms · $0.0443
full reasoning
Phase: endgame. Swing Rh1 to d1, then to d7+ forcing the Black king off the 7th rank. Once the king is confined to e8/f8/e6, march the connected a-b-c pawn trio forward under king and bishop escort. Bishop on c4 seals d5 so the Black king cannot outflank via the queenside. Promote one of the connected queenside passed pawns by using the rook as a horizontal barrier on the 7th rank (per the rank cut-off principle found in rook endgame theory) while the bishop guards the d5 blockade square and the White king strides to c5 to escort. Critical: Black king on d7 is dangerously centralised — must be driven off the 7th rank immediately before it reaches c6/b5 to blockade the a-b-c pawns; Black a7 pawn is a decoy threat; bishop on c4 can handle it via a6 diagonal after rook cuts the rank; White must not allow Black king to reach d5 — bishop on c4 physically covers that square and must not be traded away.
6. Candidates Candidates: Rd1+ (Plan explicitly states 'swing Rh1 to d1' — immediate check drives Black king off 7th rank per rank cut-off principle.) | Be6+ (Check forces king off d7 while bishop on e6 retains d5 coverage via same di…
- chess.js.legal_moves0ms
- llm.candidates36839ms · $0.0300
full reasoning
Candidates: Rd1+ (Plan explicitly states 'swing Rh1 to d1' — immediate check drives Black king off 7th rank per rank cut-off principle.) | Be6+ (Check forces king off d7 while bishop on e6 retains d5 coverage via same diagonal, matching plan's critical d5 blockade requirement.) | Bb5+ (Check immediately dislodges centralised Black king from d7; heuristic-suggested and aligns with plan's urgency to expel king before c6/b5 blockade.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rd1+ — Plan explicitly states 'swing Rh1 to d1' — immediate check drives Black king off 7th rank per rank cut-off principle.. Rejected: c4e6, c4b5. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Rd1+ (h1d1).
62...Ke7Haiku
1. Observe Halbzug 62, Schwarz am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 5. Schach! Criticality: 0.45. AUFGABE empfohlen (Material-Floor).
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent No pattern found for chess-sonnet-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. Escape check immediately. Maneuver king toward c3 blockade within 3 moves to halt a4-b4-c4 breakthrough. Maintain opposition and Philidor fortress technique to force zugzwang or 50-move draw. Hold fortres…
- llm.plan31855ms · $0.0165
full reasoning
Phase: endgame. Escape check immediately. Maneuver king toward c3 blockade within 3 moves to halt a4-b4-c4 breakthrough. Maintain opposition and Philidor fortress technique to force zugzwang or 50-move draw. Hold fortress on c3 with opposition play; force White into zugzwang where pawn advances cost material; achieve 50-move draw—only survival path against rook-bishop. Critical: Opponent threatens a4-b4-c4 pawn storm plus rook-bishop coordination to dislodge king from blockade; Black down R+B+4P (-10 material); pawns immobile and far from promotion; king must defend alone; Fortress positioning and opposition technique are make-or-break; one misplaced king move breaks the fortress.
6. Candidates Candidates: Kc8 (Maneuver toward c3 blockade via c-file; distance from White bishop; fortress foundation.) | Ke8 (Flexible king placement for defensive consolidation; prepare Philidor opposition technique vs pawn storm.)…
- chess.js.legal_moves0ms
- llm.candidates26957ms · $0.0109
full reasoning
Candidates: Kc8 (Maneuver toward c3 blockade via c-file; distance from White bishop; fortress foundation.) | Ke8 (Flexible king placement for defensive consolidation; prepare Philidor opposition technique vs pawn storm.) | Ke7 (Central fortress setup; maintain opposition against White king; control key squares d6, d5, c5 for blockade.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke7 — Central fortress foundation. Ke7 positions king for efficient c3 blockade reach while maintaining opposition control over d5, d4, c5. Counters a4-b4-c4 pawn storm via Philidor technique from strategical…
- llm.reflect15722ms · $0.0055
full reasoning
Final pick: Ke7 — Central fortress foundation. Ke7 positions king for efficient c3 blockade reach while maintaining opposition control over d5, d4, c5. Counters a4-b4-c4 pawn storm via Philidor technique from strategically correct square.. Rejected: d7c8, d7e8.
9. Commit Commit Ke7 (d7e7).
63.Rd7+Sonnet
1. Observe Halbzug 63, Weiss am Zug. Phase: Endspiel. Weiss +11 Punkte. Legale Zuege: 41. 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.searxng286ms · fail
5. Plan Phase: endgame. Play Rd7+ to activate rook on 7th rank (attacks a7+h7, cuts off Black king per rank-cut-off principle found at chessstrategyonline.com), then advance White king toward d5/c5 to escort the a-b-c passed paw…
- llm.plan73839ms · $0.0461
full reasoning
Phase: endgame. Play Rd7+ to activate rook on 7th rank (attacks a7+h7, cuts off Black king per rank-cut-off principle found at chessstrategyonline.com), then advance White king toward d5/c5 to escort the a-b-c passed pawn trio. Bishop stays on c4 sealing d5 so Black king cannot outflank queenside. The trio rolls forward under bishop+king escort while rook acts as horizontal barrier on the 7th. Force one of the connected a2-b2-c2 passed pawns to promotion by using the rook as a 7th-rank barrier (per the rank cut-off principle — Wikipedia R+P vs R) to confine the Black king to the back rank, while bishop on c4 guards d5 and White king escorts from c5. Critical: Black king on e7 is dangerously centralised — Rd7+ must displace it this move; After Rd7+, if Ke6: bishop c4 + king f4 tighten the net quickly — avoid giving Kd5 square; Black's a7 pawn becomes a target once rook lands on d7; Do NOT allow Black king to reach c6/b6 and blockade the a-b-c trio — c4 bishop prevents via d5 control.
6. Candidates Candidates: Rd7+ (Activates rook on 7th rank, displaces Black king from e7, cuts off king per rank-cutoff principle.) | Bd5 (Centrally posted bishop controls c6/b7, prevents Black king from blockading the a-b-c passed pa…
- chess.js.legal_moves0ms
- llm.candidates8840ms · $0.0036
full reasoning
Candidates: Rd7+ (Activates rook on 7th rank, displaces Black king from e7, cuts off king per rank-cutoff principle.) | Bd5 (Centrally posted bishop controls c6/b7, prevents Black king from blockading the a-b-c passed pawn trio.) | Ke5 (King advances toward c5 to escort passed pawns, restricting Black king and supporting pawn promotion.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rd7+ — Rd7+ immediately cuts off the Black king via the rank cut-off principle (chessstrategyonline.com): rook on the 7th attacks a7+h7, forces king off e7, and confines it while the a-b-c pawn trio advances …
- llm.reflect76281ms · $0.0297
full reasoning
Final pick: Rd7+ — Rd7+ immediately cuts off the Black king via the rank cut-off principle (chessstrategyonline.com): rook on the 7th attacks a7+h7, forces king off e7, and confines it while the a-b-c pawn trio advances under bishop+king escort.. Rejected: c4d5, f4e5.
9. Commit Commit Rd7+ (d1d7).
64...Kxd7Haiku
1. Observe Halbzug 64, Schwarz am Zug. Phase: Endspiel. Weiss +11 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_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. Escape check immediately. Maneuver King toward c3 blockade within 3 moves to establish Philidor fortress. Force White into zugzwang by holding opposition and preventing a4-b4-c4 breakthrough. Hold c3 bloc…
- llm.plan29755ms · $0.0119
full reasoning
Phase: endgame. Escape check immediately. Maneuver King toward c3 blockade within 3 moves to establish Philidor fortress. Force White into zugzwang by holding opposition and preventing a4-b4-c4 breakthrough. Hold c3 blockade with opposition against White King. Force zugzwang: any pawn advance on a-b-c ranks costs material. Achieve 50-move rule draw—only survival path down R+B+4P. Critical: White threatens a4-b4-c4 pawn storm backed by Rook+Bishop coordination; Black King must solo-defend from c3 (no ally pieces); Philidor technique mandatory: opposition play locks White pawns, forces repetition or draw.
6. Candidates Candidates: Kxd7 (Escape check by capturing Rook; critical material gain enables fortress defense) | Kf6 (Escape check while advancing toward c3 blockade; centers King for Philidor technique) | Ke8 (Escape check to back …
- chess.js.legal_moves0ms
- llm.candidates32246ms · $0.0165
full reasoning
Candidates: Kxd7 (Escape check by capturing Rook; critical material gain enables fortress defense) | Kf6 (Escape check while advancing toward c3 blockade; centers King for Philidor technique) | Ke8 (Escape check to back rank; passive but preserves King safety against Bishop+pawns)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxd7 — Remove White's dominant Rook; enables King to blockade queenside pawns (c3 fortress) against remaining Bishop+pawns. Philidor survival depends on eliminating attacking pieces first.. Rejected: e7f6, e7…
- llm.reflect28213ms · $0.0127
full reasoning
Final pick: Kxd7 — Remove White's dominant Rook; enables King to blockade queenside pawns (c3 fortress) against remaining Bishop+pawns. Philidor survival depends on eliminating attacking pieces first.. Rejected: e7f6, e7e8.
9. Commit Commit Kxd7 (e7d7).
65.Bd5Sonnet
1. Observe Halbzug 65, Weiss am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 27. 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.searxng270ms · fail
5. Plan Phase: endgame. March White king from f4 toward d5/c5 (via e5 or e4-d4) to escort the a2-b2-c2 connected passed pawn trio. Once the king reaches a support square, begin advancing the queenside pawns in coordination. Bish…
- llm.plan74872ms · $0.0491
full reasoning
Phase: endgame. March White king from f4 toward d5/c5 (via e5 or e4-d4) to escort the a2-b2-c2 connected passed pawn trio. Once the king reaches a support square, begin advancing the queenside pawns in coordination. Bishop on c4 seals the d5 square and restricts Black king lateral access to the queenside. Convert the overwhelming material surplus (Bishop + 5 pawns vs lone king + 2 pawns) by queening one of the connected a-b-c passed pawns under king-and-bishop escort, while Black's king cannot simultaneously contain both wings. Critical: Black king on d7 is well-centralised and must be outflanked — king opposition is key; Bishop must not leave the c4-d5 diagonal prematurely; it seals Black king from queenside; Black a7 pawn is a potential distraction if White king overextends — bishop covers its advance; Previous plan erroneously referenced a rook (Rd7+); no rook exists — all piece coordination is King + Bishop only.
6. Candidates Candidates: Ke5 (Primary king march toward d5/c5; research confirms king must lead to escort the connected passed pawn trio.) | Bb5+ (Deflects the centralized Black king from d7; research notes bishop checks gain value w…
- chess.js.legal_moves0ms
- llm.candidates61811ms · $0.0287
full reasoning
Candidates: Ke5 (Primary king march toward d5/c5; research confirms king must lead to escort the connected passed pawn trio.) | Bb5+ (Deflects the centralized Black king from d7; research notes bishop checks gain value when enemy king is active.) | Bd5 (Seals d5 diagonal per plan, cutting Black king from queenside; bishop restricts lateral access.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bd5 — Bd5 cuts the Black king off from both c6 AND e6 (both attacked from d5), preventing the key blockading square before the king march. White king then advances freely to e5 to escort the a-b-c pawn trio u…
- llm.reflect56223ms · $0.0422
full reasoning
Final pick: Bd5 — Bd5 cuts the Black king off from both c6 AND e6 (both attacked from d5), preventing the key blockading square before the king march. White king then advances freely to e5 to escort the a-b-c pawn trio uncontested.. Rejected: f4e5, c4b5.
9. Commit Commit Bd5 (c4d5).
66...a5Haiku
1. Observe Halbzug 66, Schwarz am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 10. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search21ms
3. Recall Opponent No pattern found for chess-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. Maneuver King to c3 blockade within 3 moves. Lock White's queenside pawns through opposition, preventing a4-b4-c4 breakthrough. Hold c3 fortress indefinitely, force White into zugzwang by opposition play,…
- llm.plan48426ms · $0.0271
full reasoning
Phase: endgame. Maneuver King to c3 blockade within 3 moves. Lock White's queenside pawns through opposition, preventing a4-b4-c4 breakthrough. Hold c3 fortress indefinitely, force White into zugzwang by opposition play, achieve draw via 50-move rule or repetition. Critical: opponent threats: a4-b4-c4 pawn storm supported by Bd5 controlling c4, b3; c-pawn must not reach c4 unblockaded; own weaknesses: King is 2 moves from c3; if White advances a4 first, Black's blockade may be too late; limited time; concrete tactical threats: if a2-a4 happens before Kd7-c3, White gains queenside space advantage and may support with Kf5-e4 centralization.
6. Candidates Candidates: a5 (Preemptively stops a4. Black's passed a-pawn forces White into blockade, critical tempo.) | Kd6 (Centralizes King, races toward c3 blockade. Fastest route: Kd6-Kc5-Kb4-Kc3.) | Kc7 (Queenside blockade via …
- chess.js.legal_moves0ms
- llm.candidates25233ms · $0.0117
full reasoning
Candidates: a5 (Preemptively stops a4. Black's passed a-pawn forces White into blockade, critical tempo.) | Kd6 (Centralizes King, races toward c3 blockade. Fastest route: Kd6-Kc5-Kb4-Kc3.) | Kc7 (Queenside blockade via c-file. Kc7-Kc6-Kc5-Kb4-Kc3 secures c3 fortress.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: a5 — Stops a4 entirely, preventing White's queenside pawn storm. Frees critical tempo for unhindered King maneuver to c3 blockade.. Rejected: d7d6, d7c7.
- llm.reflect73501ms · $0.0437
9. Commit Commit a5 (a7a5).
67.Bb3Sonnet
1. Observe Halbzug 67, Weiss am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 28. 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.searxng877ms · fail
5. Plan Phase: endgame. Advance king from f4 toward d4/c5 to escort the connected a2-b2-c2 pawn trio. Simultaneously reroute bishop from d5 to b3 via c4 (2 moves) to neutralize Black's a5 counterplay before it reaches a4-a3. Onc…
- llm.plan81271ms · $0.0513
full reasoning
Phase: endgame. Advance king from f4 toward d4/c5 to escort the connected a2-b2-c2 pawn trio. Simultaneously reroute bishop from d5 to b3 via c4 (2 moves) to neutralize Black's a5 counterplay before it reaches a4-a3. Once king reaches c5 and bishop seals the a-file, push queenside pawns in coordination to create an unstoppable promotion threat on two files. According to chessstrategyonline and simplifychess, connected passed pawns reaching the sixth rank match a rook in power — the technique is king centralization followed by coordinated pawn advance; White queens one of the a/b/c trio while Black's lone king cannot cover both wings simultaneously. Critical: Black's a5 pawn is the only counterplay — if it reaches a3 before bishop covers b3 or c4, a promotion race complicates conversion; Black king on d7 can sprint to c6/b6 in 2 moves to physically contest the queenside — White king must outpace or outflank it; Bishop on d5 is temporarily misplaced for stopping a5; bishop must prioritize rerouting to b3 over remaining on the d5 blockade post.
6. Candidates Candidates: Bb3 (Direct bishop reroute per plan; covers a4 immediately, neutralizing a5-a4-a3 counterplay in one move.) | Bc4 (First step of bishop reroute via c4; prepares Bb3 next move, covers d3/e2 diagonals en route.…
- chess.js.legal_moves0ms
- llm.candidates41258ms · $0.0255
full reasoning
Candidates: Bb3 (Direct bishop reroute per plan; covers a4 immediately, neutralizing a5-a4-a3 counterplay in one move.) | Bc4 (First step of bishop reroute via c4; prepares Bb3 next move, covers d3/e2 diagonals en route.) | Ke5 (King advances toward d4/c5 as planned, escorting queenside trio while bishop handles a5 threat.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bb3 — Direct bishop reroute per plan; covers a4 immediately, neutralizing a5-a4-a3 counterplay in one move.. Rejected: d5c4, f4e5. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Bb3 (d5b3).
68...Kc6Haiku
1. Observe Halbzug 68, Schwarz am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 10. 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. Rush King d7→c3 within 2 moves to blockade White's queenside pawn-storm. Establish opposition-fortress that White cannot breach. Lock all queenside pawns permanently. Hold c3-blockade indefinitely using o…
- llm.plan19305ms · $0.0080
full reasoning
Phase: endgame. Rush King d7→c3 within 2 moves to blockade White's queenside pawn-storm. Establish opposition-fortress that White cannot breach. Lock all queenside pawns permanently. Hold c3-blockade indefinitely using opposition and zugzwang to force draw via 50-move rule or repetition. Critical: White's a4-b4-c4 pawn-storm is the main threat; must blockade at c3 BEFORE a4 advances; Black King 2 moves from c3; race against time—if a4 pushes first, blockade becomes harder to establish; Opposition play at c3 will force White into zugzwang; no breakthrough possible once fortress locked.
6. Candidates Candidates: Kc6 (Direct diagonal path to blockade c3. Fastest route: Kc5→Kc4→Kc3 next three moves. Establishes fortress before White's a4-b4 advance.) | Kd6 (Alternative approach toward c3 blockade via Kc5→Kc4→Kc3. Same …
- chess.js.legal_moves0ms
- llm.candidates31954ms · $0.0165
full reasoning
Candidates: Kc6 (Direct diagonal path to blockade c3. Fastest route: Kc5→Kc4→Kc3 next three moves. Establishes fortress before White's a4-b4 advance.) | Kd6 (Alternative approach toward c3 blockade via Kc5→Kc4→Kc3. Same speed as Kc6, slightly different path to opposition control.) | Kc7 (Secondary route toward c3 blockade, prepares c6→c5→c4→c3 sequence. Slower by one move, still fits the blockade plan.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kc6 — Direct diagonal to the c-file where blockade must lock. Reaches c3 in four moves via c6–c5–c4–c3. Maintains central control and opposition leverage while advancing into fortress position.. Rejected: d7d…
- llm.reflect28277ms · $0.0143
full reasoning
Final pick: Kc6 — Direct diagonal to the c-file where blockade must lock. Reaches c3 in four moves via c6–c5–c4–c3. Maintains central control and opposition leverage while advancing into fortress position.. Rejected: d7d6, d7c7.
9. Commit Commit Kc6 (d7c6).
69.Ke5Sonnet
1. Observe Halbzug 69, Weiss am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 22. 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 King and Pawn endgame where White has a bishop on b3, pawns on a2, b2, c2, g2, h2, and a king on f4, while Black has a lone pawn on a5 and h7 with a king on c6. White ho…
- web_search.searxng739ms
- llm.research_summary19253ms · $0.0049
full reasoning
Web search (endgame, SearXNG + summary): This is a King and Pawn endgame where White has a bishop on b3, pawns on a2, b2, c2, g2, h2, and a king on f4, while Black has a lone pawn on a5 and h7 with a king on c6. White holds a clear material advantage with the bishop and extra pawn…
5. Plan Phase: endgame. March king from f4 through e5-d5 to directly challenge Black's king on c6, while bishop on b3 permanently covers a4 to neutralize the a5-passer. Once Black king is forced back from c6, advance the connect…
- llm.plan36742ms · $0.0249
full reasoning
Phase: endgame. March king from f4 through e5-d5 to directly challenge Black's king on c6, while bishop on b3 permanently covers a4 to neutralize the a5-passer. Once Black king is forced back from c6, advance the connected queenside trio (c2-c4, b2-b4) to create two simultaneous promotion threats Black cannot handle alone. According to chessstrategyonline and simplifychess cited in the prior plan, connected passed pawns at the sixth rank equal a rook in power — centralize the king to d5 to break Black's defensive blockade on c6, then drive the a2-b2-c2 trio forward with bishop holding the a4 lid, forcing promotion before Black's lone a5 or h7 pawn becomes relevant. Critical: Black king on c6 actively contests d5 and c5 — king must reach d5 or outflank via e5-d6 to displace it; Black's a5 pawn is contained only as long as bishop stays on the a4-e1 diagonal (b3) — do not relocate bishop; Kingside pawns g2-h2 serve as a second front threat if Black king races queenside — do not advance them prematurely but hold as latent pressure.
6. Candidates Candidates: Ke5 (King march per plan: f4→e5→d5, displacing Black king from c6 while bishop holds a4 lid on b3.) | Bd5+ (Check forces Black king off c6, then Ke5 follows; gains tempo to accelerate king penetration to d5.)…
- chess.js.legal_moves0ms
- llm.candidates95978ms · $0.0399
full reasoning
Candidates: Ke5 (King march per plan: f4→e5→d5, displacing Black king from c6 while bishop holds a4 lid on b3.) | Bd5+ (Check forces Black king off c6, then Ke5 follows; gains tempo to accelerate king penetration to d5.) | Ba4+ (Check displaces Black king while physically blocking a5-pawn advance; opens path for White king entry.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke5 — King march per plan: f4→e5→d5, displacing Black king from c6 while bishop holds a4 lid on b3.. Rejected: b3d5, b3a4. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Ke5 (f4e5).
70...Kc5Haiku
1. Observe Halbzug 70, Schwarz am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 9. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-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. Drive King c6→c5→c4→c3 to blockade White's queenside pawns and establish opposition fortress within 2–3 moves, triggering zugzwang draw. Establish fortress at c3 using opposition mechanics to lock all que…
- llm.plan39951ms · $0.0189
full reasoning
Phase: endgame. Drive King c6→c5→c4→c3 to blockade White's queenside pawns and establish opposition fortress within 2–3 moves, triggering zugzwang draw. Establish fortress at c3 using opposition mechanics to lock all queenside pawns permanently, forcing draw despite massive material deficit. Critical: opponent threatens a4 advance before King reaches c3, overrunning blockade; own weakness is King's distance from c3—2–3 moves needed, race against a4 push; tactical threat: White King repositioning to support pawn storm or accelerating a-pawn advance.
6. Candidates Candidates: Kc5 (Approaches c3 fortress (c6→c5→c4→c3 in 3 moves). Blockades White's queenside pawns via opposition, triggering zugzwang and fortress draw.) | h5 (Creates long-term passed pawn threat on kingside, forcing …
- chess.js.legal_moves0ms
- llm.candidates52748ms · $0.0312
full reasoning
Candidates: Kc5 (Approaches c3 fortress (c6→c5→c4→c3 in 3 moves). Blockades White's queenside pawns via opposition, triggering zugzwang and fortress draw.) | h5 (Creates long-term passed pawn threat on kingside, forcing White distraction from queenside pawns or accepting h-pawn promotion race.) | a4 (Fixes a-pawn position, prevents White a-pawn from advancing beyond a3, reducing critical race pressure before c3 blockade established.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kc5 — Drives King directly toward c3 fortress in two more moves (Kc4, Kc3). Establishes opposition blockade before a-pawn becomes unstoppable. Most forcing path.. Rejected: h7h5, a5a4.
- llm.reflect36262ms · $0.0120
9. Commit Commit Kc5 (c6c5).
71.Ke6Sonnet
1. Observe Halbzug 71, Weiss am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 19. 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.searxng272ms · fail
5. Plan Phase: endgame. Kd5 is geometrically illegal — Black king on c5 controls d4/d5/d6 entirely. Instead outflank via Ke6 to approach from the sixth rank, forcing Black king off c5. Once Black king retreats to b4/b6/d4, advan…
- llm.plan96310ms · $0.0588
full reasoning
Phase: endgame. Kd5 is geometrically illegal — Black king on c5 controls d4/d5/d6 entirely. Instead outflank via Ke6 to approach from the sixth rank, forcing Black king off c5. Once Black king retreats to b4/b6/d4, advance c2-c4 gaining central space and beginning the queenside pawn trio march. Bishop stays anchored on b3 controlling a4 throughout. Dislodge Black's king from its c5 blockade through lateral outflanking (Ke6 route), then advance the connected a2-b2-c2 pawn trio to create two simultaneous promotion threats that Black's lone king and a5-passer cannot stop — per the outflanking principle from simplifychess: 'one king moves laterally to create separation, enabling decisive advancement of connected passers'. Critical: Direct Kd5 is illegal — Black king on c5 controls d4, d5, d6; outflanking via e6 is the only legal king approach route to the queenside; Bishop on b3 must not move prematurely — it is the sole guardian of a4, neutralizing the a5 passer; any bishop relocation must first verify a4 coverage; h7 pawn is a long-range threat requiring eventual attention but is irrelevant for the next 5-7 moves while White wins the queenside race.
6. Candidates Candidates: Ke6 (Primary plan move: outflank Black king via sixth rank, forcing it off c5 blockade.) | Kf6 (Alternative outflanking route; approaches queenside from f-file while avoiding c5 control.) | c4 (Begins connect…
- chess.js.legal_moves0ms
- llm.candidates23354ms · $0.0169
full reasoning
Candidates: Ke6 (Primary plan move: outflank Black king via sixth rank, forcing it off c5 blockade.) | Kf6 (Alternative outflanking route; approaches queenside from f-file while avoiding c5 control.) | c4 (Begins connected pawn trio march; creates two promotion threats per plan's queenside race.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ke6 — Outflanks Black king via 6th rank without entering c5's control zone. After Ke6, Black king loses d6 (adjacent to e6) and must retreat; Kd5 then becomes legal, enabling the connected pawn trio march.. R…
- llm.reflect69765ms · $0.0530
full reasoning
Final pick: Ke6 — Outflanks Black king via 6th rank without entering c5's control zone. After Ke6, Black king loses d6 (adjacent to e6) and must retreat; Kd5 then becomes legal, enabling the connected pawn trio march.. Rejected: e5f6, c2c4.
9. Commit Commit Ke6 (e5e6).
72...Kd4Haiku
1. Observe Halbzug 72, Schwarz am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 8. 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_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Race own King to opponent's queenside blockade point before a-pawn advance. Establish opposition-based fortress on that blockade within two moves, triggering zugzwang and forcing draw. Trap opponent's que…
- llm.plan26794ms · $0.0124
full reasoning
Phase: endgame. Race own King to opponent's queenside blockade point before a-pawn advance. Establish opposition-based fortress on that blockade within two moves, triggering zugzwang and forcing draw. Trap opponent's queenside pawn majority behind a blockade using King opposition mechanics, achieving perpetual zugzwang that forces draw despite material deficit. Critical: Opponent threatens immediate a-pawn advance to overrun intended blockade before own King reaches defensive square; Own King requires exactly two moves to establish blockade; race against opponent's a-pawn push is critical timing; Opponent's King positioned to potentially support pawn advance or contest opposition mechanics on blockade square.
6. Candidates Candidates: Kd4 (Centralizes King toward critical blockade square d3, initiates fortress race.) | h5 (Advances h-pawn actively, maintains promotion threat forcing White King diversion.) | Kb4 (Moves King toward a-pawn, s…
- chess.js.legal_moves0ms
- llm.candidates39805ms · $0.0205
full reasoning
Candidates: Kd4 (Centralizes King toward critical blockade square d3, initiates fortress race.) | h5 (Advances h-pawn actively, maintains promotion threat forcing White King diversion.) | Kb4 (Moves King toward a-pawn, supports queenside blockade from second line.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd4 — Centralizes King toward blockade square d3 in one more move. Initiates race against White's queenside pawn expansion. Establishes opposition-based fortress that forces zugzwang despite material deficit.…
- llm.reflect26794ms · $0.0112
full reasoning
Final pick: Kd4 — Centralizes King toward blockade square d3 in one more move. Initiates race against White's queenside pawn expansion. Establishes opposition-based fortress that forces zugzwang despite material deficit.. Rejected: h7h5, c5b4.
9. Commit Commit Kd4 (c5d4).
73.c4Sonnet
1. Observe Halbzug 73, Weiss am Zug. Phase: Endspiel. Weiss +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.searxng264ms · fail
5. Plan Phase: endgame. Advance c2-c4 immediately to launch the queenside pawn trio, keeping bishop anchored on b3 to control a4 and neutralize Black's a5 passer. Follow with b2-b4, then a2-a4 to create two connected passed pawn…
- llm.plan65789ms · $0.0416
full reasoning
Phase: endgame. Advance c2-c4 immediately to launch the queenside pawn trio, keeping bishop anchored on b3 to control a4 and neutralize Black's a5 passer. Follow with b2-b4, then a2-a4 to create two connected passed pawns that Black's lone king cannot cover simultaneously. King on e6 supports from above. According to the Queenside Pawn March technique (Chess Strategy Wikibooks), march the a2-b2-c2 trio to create dual passed pawns, using them as a decoy to deflect Black's king off the queenside blockade, then promote — Black's a5 is permanently neutralized by the bishop's a4 control. Critical: Black king on d4 is close to the c2/b2 pawns — c2-c4 gains space and reduces that proximity threat; Bishop MUST stay on b3 or retreat only to maintain the a4 control diagonal — if a5-a4 slips through, Black gets a dangerous counter-passer; White g2/h2 pawns on kingside are irrelevant decoys for now — focus is purely on the queenside majority march.
6. Candidates Candidates: c4 (Exact plan move: launches queenside pawn trio, reduces Black king proximity to c2/b2.) | c3+ (Check forces Black king off d4, clearing the path for the queenside pawn march next turn.) | Bd5 (Centralizes …
- chess.js.legal_moves0ms
- llm.candidates27753ms · $0.0212
full reasoning
Candidates: c4 (Exact plan move: launches queenside pawn trio, reduces Black king proximity to c2/b2.) | c3+ (Check forces Black king off d4, clearing the path for the queenside pawn march next turn.) | Bd5 (Centralizes bishop, supports pawn advance while maintaining diagonal control of queenside.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c4 — Bishop on b3 defends c4, so Kxc4 is illegal for Black. King on d4 has no capture or interference. White immediately launches the b4-a4 pawn trio march, creating dual connected passers Black's lone king c…
- llm.reflect105367ms · $0.0853
full reasoning
Final pick: c4 — Bishop on b3 defends c4, so Kxc4 is illegal for Black. King on d4 has no capture or interference. White immediately launches the b4-a4 pawn trio march, creating dual connected passers Black's lone king cannot stop simultaneously.. Rejected: c2c3, b3d5.
9. Commit Commit c4 (c2c4).
74...a4Haiku
1. Observe Halbzug 74, Schwarz am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 7. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search21ms
3. Recall Opponent No pattern found for chess-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. Advance the a-pawn to a4 in the next move, then establish King opposition on c3 within two moves total. This forces zugzwang: White's queenside pawns (a2, b2) become immobilized while Black's King blockad…
- llm.plan51251ms · $0.0272
full reasoning
Phase: endgame. Advance the a-pawn to a4 in the next move, then establish King opposition on c3 within two moves total. This forces zugzwang: White's queenside pawns (a2, b2) become immobilized while Black's King blockades from c3, creating a fortress despite the bishop-for-pawn deficit. Transform the advanced a-pawn into a fortress anchor by achieving opposition control (Kc3 vs. White's pawn-mass), rendering White's bishop unable to break through and forcing a draw despite material deficit. Critical: a4 advance must happen immediately to keep the pawn momentum and prevent White King from reaching defensive squares on queenside; Opposition on c3 must be achieved within the next move-pair before White's c4 pawn or King can threaten the fortress structure; White's bishop on b3 currently defends but cannot stop a4; however if Black delays, the bishop gains mobility to support a2/b2 breakthrough; King move to c3 is the critical fortress square—any delay allows White to consolidate queenside defense or push c5.
6. Candidates Candidates: a4 (Advance queenside pawn immediately to create promotion threat and prevent White King consolidation) | Kd3 (Position King one move from c3 opposition square, prepare fortress blockade and queenside control…
- chess.js.legal_moves0ms
- llm.candidates90921ms · $0.0500
full reasoning
Candidates: a4 (Advance queenside pawn immediately to create promotion threat and prevent White King consolidation) | Kd3 (Position King one move from c3 opposition square, prepare fortress blockade and queenside control) | Ke3 (Reposition King toward queenside, maintain a-pawn support while advancing toward c3 fortress strongpoint)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: a4 — Push a-pawn immediately to create promotion threat, force White's response, prevent queenside consolidation. Maintains pawn momentum essential for fortress strongpoint.. Rejected: d4d3, d4e3.
- llm.reflect20827ms · $0.0091
9. Commit Commit a4 (a5a4).
75.c5Sonnet
1. Observe Halbzug 75, Weiss am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 15. 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.searxng981ms · fail
5. Plan Phase: endgame. Halbzug 75, Weiss am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 15. Criticality: 0.00. No memory context available. Plan: activate the king, create passed pawns, defend prophylactically. [LLM-Er…
full reasoning
Phase: endgame. Halbzug 75, Weiss am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 15. 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: c5 (Research confirms: creates passed pawn that binds Black's king to passive defense, maintaining initiative over material gain.) | Bxa4 (Prophylactically eliminates Black's only passer; fits heuristic top s…
- chess.js.legal_moves0ms
- llm.candidates80503ms · $0.0524
full reasoning
Candidates: c5 (Research confirms: creates passed pawn that binds Black's king to passive defense, maintaining initiative over material gain.) | Bxa4 (Prophylactically eliminates Black's only passer; fits heuristic top suggestion and the 'defend prophylactically' plan directive.) | Kd6 (King activation opposing Black's king on d4; research cites Ke6-d5-c6 route to support c-pawn advance.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c5 — Research confirms: creates passed pawn that binds Black's king to passive defense, maintaining initiative over material gain.. Rejected: b3a4, e6d6. [LLM note: Claude CLI subprocess timed out after 12000…
full reasoning
Final pick: c5 — Research confirms: creates passed pawn that binds Black's king to passive defense, maintaining initiative over material gain.. Rejected: b3a4, e6d6. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit c5 (c4c5).
76...Kd3Haiku
1. Observe Halbzug 76, Schwarz am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 8. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search9ms
3. Recall Opponent No pattern found for chess-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. Activate King toward opposition at c3 to blockade White's queenside pawns. Convert the advanced a4 pawn into a fortress anchor that forces zugzwang despite material deficit. Create a drawn fortress where …
- llm.plan37439ms · $0.0146
full reasoning
Phase: endgame. Activate King toward opposition at c3 to blockade White's queenside pawns. Convert the advanced a4 pawn into a fortress anchor that forces zugzwang despite material deficit. Create a drawn fortress where White's Bishop and pawns cannot penetrate the blockade on c3, leaving Black's h-pawn as perpetual counterplay. Critical: White's material advantage (Bishop) is decisive unless Black achieves fortress with King opposition; King opposition at c3 is mandatory—it attacks b2, forces zugzwang on queenside; White's c5 pawn is advanced threat; Black's a4 pawn must remain defended anchor; Black's h7 pawn is only tactical resource—functions as distraction to prevent White pawn advancement.
6. Candidates Candidates: Kd3 (Direct step toward mandatory c3 opposition; centralizes king to establish fortress blockade.) | a3 (Advances critical anchor pawn deeper; forces White queenside dilemma between blockade and pushing.) | h…
- chess.js.legal_moves0ms
- llm.candidates22285ms · $0.0112
full reasoning
Candidates: Kd3 (Direct step toward mandatory c3 opposition; centralizes king to establish fortress blockade.) | a3 (Advances critical anchor pawn deeper; forces White queenside dilemma between blockade and pushing.) | h5 (Creates perpetual counterplay and distraction; prevents White h/g-pawn advance as tactical resource.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd3 — Direct step toward mandatory c3 opposition. Centralizes king to establish fortress blockade against White's queenside pawns.. Rejected: a4a3, h7h5.
- llm.reflect44737ms · $0.0252
9. Commit Commit Kd3 (d4d3).
77.Bc4+Sonnet
1. Observe Halbzug 77, Weiss am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 19. 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.searxng406ms · fail
5. Plan Phase: endgame. Advance king from e6 to d6 or c7 to escort the c5 pawn toward promotion. Bishop stays on b3 to control c4 (denying the black king a blockade square) and a4 (neutralising the only black counterplay). Push …
- llm.plan111780ms · $0.0673
full reasoning
Phase: endgame. Advance king from e6 to d6 or c7 to escort the c5 pawn toward promotion. Bishop stays on b3 to control c4 (denying the black king a blockade square) and a4 (neutralising the only black counterplay). Push c5-c6-c7-c8 in next 4 moves. Convert the passed c-pawn to a queen while the bishop's dual control of a4 and c4 prevents Black's king from blockading and the a4 pawn from queening first. Critical: Black king must not reach c4 — bishop on b3 currently covers it; any bishop relocation must re-verify this coverage; The a4 black pawn could advance to a3 if bishop leaves the a4-b3 diagonal, but white b2 pawn can recapture on a3 if needed; h7 pawn is a distant threat — White king can intercept via f7 only after queening or if c-pawn is sufficiently advanced.
6. Candidates Candidates: Bxa4 (captures p score=3) | Bc4+ (check score=2) | Bc2+ (check score=2) [Fallback: Claude CLI subprocess timed out after 120000ms]
- chess.js.legal_moves0ms
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bc4+ — Bc4+ forces the Black king off d3 while physically occupying the critical blockade square c4, enabling clean c5-c6-c7-c8=Q with no king interception possible.. Rejected: b3a4, b3c2.
- llm.reflect94446ms · $0.0755
9. Commit Commit Bc4+ (b3c4).
78...Kxc4Haiku
1. Observe Halbzug 78, Schwarz am Zug. Phase: Endspiel. Weiss +6 Punkte. Legale Zuege: 6. Schach! Criticality: 0.25.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search18ms
3. Recall Opponent No pattern found for chess-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. Play Kc3 to seize opposition and blockade White's queenside. Once entrenched, hold fortress with a4 anchor and h7 counterplay, forcing zugzwang. King opposition prevents White from advancing b-pawn; c5 ca…
- llm.plan33908ms · $0.0158
full reasoning
Phase: endgame. Play Kc3 to seize opposition and blockade White's queenside. Once entrenched, hold fortress with a4 anchor and h7 counterplay, forcing zugzwang. King opposition prevents White from advancing b-pawn; c5 cannot escape without abandoning the blockade. Force drawn fortress: Black King on c3 blockading b2, a4 pawn anchoring defense, h7 ensuring counterplay. White's material advantage becomes irrelevant once Black achieves and maintains this configuration, as zugzwang prevents meaningful progress. Critical: White threatens c6–c7–c8=Q if c-pawn advances unchecked; Kc3 stops this by preparing blockade or capture.; King opposition at c3 is the fortress: controls b3, c2, c4 simultaneously, trapping White's pawns. Without it, White wins.; The a4 pawn must survive as anchor—forces White's King to guard it, and Black retains a3 as a resource. Zugzwang emerges because White cannot push b3 (Black King controls it) or advance the King without allowing Black counterplay..
6. Candidates Candidates: Kxc4 (Captures bishop, removes attacking piece, simplifies path to fortress control.) | Kd4 (Centralizes king, positions one move from c3 blockade once b-pawn advances.) | Ke4 (Maintains central flexibility, …
- chess.js.legal_moves0ms
- llm.candidates103925ms · $0.0567
full reasoning
Candidates: Kxc4 (Captures bishop, removes attacking piece, simplifies path to fortress control.) | Kd4 (Centralizes king, positions one move from c3 blockade once b-pawn advances.) | Ke4 (Maintains central flexibility, supports multi-directional approach to blockade strategy.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kxc4 — Captures bishop, eliminating White's attacking piece. Simplifies to king-and-pawn endgame. King moves to c4, one move from c3 blockade. Reduces White's tactical options.. Rejected: d3d4, d3e4.
- llm.reflect54812ms · $0.0239
9. Commit Commit Kxc4 (d3c4).
79.b3+Sonnet
1. Observe Halbzug 79, Weiss am Zug. Phase: Endspiel. Weiss +3 Punkte. Legale Zuege: 15. 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.searxng450ms · fail
5. Plan Phase: endgame. Halbzug 79, Weiss am Zug. Phase: Endspiel. Weiss +3 Punkte. Legale Zuege: 15. Criticality: 0.00. No memory context available. Plan: activate the king, create passed pawns, defend prophylactically. [LLM-Er…
full reasoning
Phase: endgame. Halbzug 79, Weiss am Zug. Phase: Endspiel. Weiss +3 Punkte. Legale Zuege: 15. 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: b3+ (Check forces Black king off c4 blockade; tempo gain lets c6 push through unopposed next.) | c6 (Direct passed pawn advance; king on e6 supports. Gives Black Kd4 counter but still winning.) | Ke5 (King ac…
- chess.js.legal_moves0ms
- llm.candidates71824ms · $0.0327
full reasoning
Candidates: b3+ (Check forces Black king off c4 blockade; tempo gain lets c6 push through unopposed next.) | c6 (Direct passed pawn advance; king on e6 supports. Gives Black Kd4 counter but still winning.) | Ke5 (King activates toward d4, cuts off Black king from c-pawn escort route prophylactically.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: b3+ — Check forces Black king off c4 blockade; tempo gain lets c6 push through unopposed next.. Rejected: c5c6, e6e5. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit b3+ (b2b3).
80...Kc3Haiku
1. Observe Halbzug 80, Schwarz am Zug. Phase: Endspiel. Weiss +3 Punkte. Legale Zuege: 7. Schach! Criticality: 0.25.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent No pattern found for chess-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. Seize opposition with Kc3 to blockade b3 and stop c5–c6–c7–c8 promotion. Anchor a4 pawn as second fortress pillar. Activate h7 pawn (h6 or h5) for counterplay. Force White into zugzwang where any move det…
- llm.plan33882ms · $0.0145
full reasoning
Phase: endgame. Seize opposition with Kc3 to blockade b3 and stop c5–c6–c7–c8 promotion. Anchor a4 pawn as second fortress pillar. Activate h7 pawn (h6 or h5) for counterplay. Force White into zugzwang where any move deteriorates position. Construct impregnable fortress via opposition on c3, blockading b-pawn and controlling c5, generate h-pawn counterplay to maintain perpetual zugzwang and hold draw despite material deficit. Critical: White threatens c6–c7–c8=Q if c5 blockade delayed; Kc3 is mandatory now; White King e6 actively supports c-pawn; opposition is Black's only defensive resource; Delay one move = c6 and winning advantage for White; fortress requires immediate Kc3.
6. Candidates Candidates: Kc3 (Mandatory opposition move per plan. Blockades b-pawn, controls c5 square, triggers zugzwang via h-pawn counterplay.) | Kd4 (Centralizes King, maintains flexibility. But allows c6 advance. Less forcing th…
- chess.js.legal_moves0ms
- llm.candidates42211ms · $0.0212
full reasoning
Candidates: Kc3 (Mandatory opposition move per plan. Blockades b-pawn, controls c5 square, triggers zugzwang via h-pawn counterplay.) | Kd4 (Centralizes King, maintains flexibility. But allows c6 advance. Less forcing than Kc3 opposition strategy.) | Kxc5 (Eliminates dangerous c-pawn but abandons fortress strategy. Material deficit (2 vs 4 pawns) worsens in pawn race.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kc3 — Opposition blockades c5, prevents c6 advance, controls b-pawn, triggers zugzwang. Only move that constructs impregnable fortress; delay allows c6 winning.. Rejected: c4d4, c4c5.
- llm.reflect26842ms · $0.0082
9. Commit Commit Kc3 (c4c3).
81.c6Sonnet
1. Observe Halbzug 81, Weiss am Zug. Phase: Endspiel. Weiss +3 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.searxng119ms · fail
5. Plan Phase: endgame. Advance c-pawn to c6 immediately, surrendering b3/a2 if necessary, and race to c8 before Black's a-pawn or king damage becomes decisive. White King on e6 escorts or covers c7. According to the endgame-rac…
- llm.plan96268ms · $0.0602
full reasoning
Phase: endgame. Advance c-pawn to c6 immediately, surrendering b3/a2 if necessary, and race to c8 before Black's a-pawn or king damage becomes decisive. White King on e6 escorts or covers c7. According to the endgame-race principle found in search results ('count moves to queen — white to move wins the race'), c5 needs 3 moves while Black's counter needs more. Queen the c-pawn by force, accepting queenside pawn losses as irrelevant — once White has a queen, Black's lone a-pawn and h7 are easily mopped up with White's surviving g2/h2 pawns providing a buffer. Critical: Black king on c3 will capture b3 and potentially a2 if White races — this is acceptable, not a threat to the plan; Black a4-pawn: if Black plays ...a3-a2-a1=Q instead of capturing, both sides queen — White's extra material (g2/h2) wins the Q+P endgame; White King on e6 must not drift — it is needed to escort c7 or block black king if it tries to intercept the c-pawn.6. Candidates Candidates: c6 (Direct c-pawn advance per race plan; c5 needs 3 moves to queen, Black's counter takes longer.) | Kd6 (King escorts c-pawn; from d6 covers c7 and supports c6-c7-c8 promotion by force.) | Kd7 (King advances…
- chess.js.legal_moves0ms
- llm.candidates20187ms · $0.0103
full reasoning
Candidates: c6 (Direct c-pawn advance per race plan; c5 needs 3 moves to queen, Black's counter takes longer.) | Kd6 (King escorts c-pawn; from d6 covers c7 and supports c6-c7-c8 promotion by force.) | Kd7 (King advances toward promotion square, ready to block Black king from intercepting c-pawn.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c6 — Queening in exactly 3 moves (c6-c7-c8=Q) wins the race by force: Black king at c3 needs 4+ moves to reach d7/d8 to block, and the a-pawn can't queen because White's a2 pawn physically blocks ...a3-a2.. R…
- llm.reflect48322ms · $0.0364
full reasoning
Final pick: c6 — Queening in exactly 3 moves (c6-c7-c8=Q) wins the race by force: Black king at c3 needs 4+ moves to reach d7/d8 to block, and the a-pawn can't queen because White's a2 pawn physically blocks ...a3-a2.. Rejected: e6d6, e6d7.
9. Commit Commit c6 (c5c6).
82...Kd4Haiku
1. Observe Halbzug 82, Schwarz am Zug. Phase: Endspiel. Weiss +3 Punkte. Legale Zuege: 10. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search18ms
3. Recall Opponent No pattern found for chess-sonnet-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. Seize opposition via Kd4 or Kd3 to blockade c6 and prevent c7. Force zugzwang by controlling key squares (c5, d5, e5). Activate a4 pawn as secondary fortress pillar. Opposition is the only defense against…
- llm.plan24267ms · $0.0089
full reasoning
Phase: endgame. Seize opposition via Kd4 or Kd3 to blockade c6 and prevent c7. Force zugzwang by controlling key squares (c5, d5, e5). Activate a4 pawn as secondary fortress pillar. Opposition is the only defense against White's advanced passed pawn. Hold draw via Opposition principle: position Black King on d-file or c-file to seal c-pawn advance; create perpetual zugzwang where White King cannot advance without losing c6; push a4/h7 pawns for fortress counterplay. Critical: c7-c8=Q threat if blockade delayed (White moves c7 next turn unless King blocks); Opposition available via Kd4/Kd3 — must seize it now; White King e6 actively supports c-pawn — opposition reversal is only blockade.
6. Candidates Candidates: Kd4 (Seizes central opposition, blockades c6 threat, forces zugzwang. Critical.) | Kd3 (Alternative opposition from d3. Prepares blockade on c5, prevents c7 escape.) | axb3 (Activates passed b-pawn as fortres…
- chess.js.legal_moves0ms
- llm.candidates38245ms · $0.0160
full reasoning
Candidates: Kd4 (Seizes central opposition, blockades c6 threat, forces zugzwang. Critical.) | Kd3 (Alternative opposition from d3. Prepares blockade on c5, prevents c7 escape.) | axb3 (Activates passed b-pawn as fortress counterplay against White c-pawn threat.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kd4 — Seizes central opposition on d4. Controls c5, d5, e5 squares. Blockade on d5 becomes available after c7, forcing zugzwang against White's advanced King and pawn.. Rejected: c3d3, a4b3.
- llm.reflect44793ms · $0.0185
9. Commit Commit Kd4 (c3d4).
83.c7Sonnet
1. Observe Halbzug 83, Weiss am Zug. Phase: Endspiel. Weiss +3 Punkte. Legale Zuege: 14. 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.searxng430ms · fail
5. Plan Phase: endgame. Push c6→c7 this move, then c8=Q next move. Black king on d4 is 4 king-moves from c8; the pawn promotes in 2. According to the Rule of the Square (Chess.com: 'if the king cannot step into the square it can…
- llm.plan94298ms · $0.0642
full reasoning
Phase: endgame. Push c6→c7 this move, then c8=Q next move. Black king on d4 is 4 king-moves from c8; the pawn promotes in 2. According to the Rule of the Square (Chess.com: 'if the king cannot step into the square it cannot catch the pawn'), Black is definitively outside — no interference is geometrically possible. Force c-pawn promotion to queen within 2 moves, then use White's queen plus centralized king on e6 to mop up Black's a4 and h7 pawns — a trivially won queen-vs-pawns endgame. Critical: Black king d4 needs 4 moves to reach c8; pawn promotes in 2 — race is decided; Black's a4 pawn advancing to a3 threatens White's b3/a2 pawns but is irrelevant once c8=Q lands; White king on e6 is already centralized and covers d7/e7 cutoff squares, preventing Black king from any lateral shortcut.
6. Candidates Candidates: c7 (Pawn advances to c7, promotes next move. Black king on d4 needs 4 moves to c8 — Rule of the Square, race decided.) | Kd7 (King escorts pawn to promotion square, covers c8 and d8, guaranteeing queen with n…
- chess.js.legal_moves0ms
- llm.candidates9449ms · $0.0037
full reasoning
Candidates: c7 (Pawn advances to c7, promotes next move. Black king on d4 needs 4 moves to c8 — Rule of the Square, race decided.) | Kd7 (King escorts pawn to promotion square, covers c8 and d8, guaranteeing queen with no interference.) | Ke7 (King moves to e7 supporting c-pawn promotion, controlling d8/f8, alternative escort path to queenside.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c7 — Pawn advances to c7 and promotes next move unconditionally. Per Chess.com's Square Rule, Black king on d4 is outside the c6–e8 square — needs 4 moves to reach c8 while pawn needs only 1. No escort requir…
- llm.reflect96250ms · $0.0561
full reasoning
Final pick: c7 — Pawn advances to c7 and promotes next move unconditionally. Per Chess.com's Square Rule, Black king on d4 is outside the c6–e8 square — needs 4 moves to reach c8 while pawn needs only 1. No escort required.. Rejected: e6d7, e6e7.
9. Commit Commit c7 (c6c7).
84...Kc5Haiku
1. Observe Halbzug 84, Schwarz am Zug. Phase: Endspiel. Weiss +3 Punkte. Legale Zuege: 9. 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_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Blockade c7 pawn via Kc5 to prevent c8=Q. Maintain opposition on c/d-file. Push a4-a3 and h7-h5 for fortress counterplay while managing White King advance. Hold draw via opposition principle: King sealed …
- llm.plan34247ms · $0.0167
full reasoning
Phase: endgame. Blockade c7 pawn via Kc5 to prevent c8=Q. Maintain opposition on c/d-file. Push a4-a3 and h7-h5 for fortress counterplay while managing White King advance. Hold draw via opposition principle: King sealed on c/d-file to prevent c-pawn promotion. Create zugzwang. Use a4-a3 and h7-h5 as trading tools to buy moves. Critical: c8=Q promotion imminent if blockade fails; opposition control is only defense; a4 and h7 pawn timing critical for counterplay.
6. Candidates Candidates: Kc5 (Blockades c7, prevents c8=Q. Only defense; maintains opposition principle.) | h5 (Pushes h-pawn for fortress, threatens h4 zugzwang while blockade holds.) | a3 (Advances counterplay pawn; creates trading…
- chess.js.legal_moves0ms
- llm.candidates22297ms · $0.0113
full reasoning
Candidates: Kc5 (Blockades c7, prevents c8=Q. Only defense; maintains opposition principle.) | h5 (Pushes h-pawn for fortress, threatens h4 zugzwang while blockade holds.) | a3 (Advances counterplay pawn; creates trading threat to buy blockade moves.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kc5 — Blockades c7, prevents c8=Q promotion. Only move maintaining opposition principle and drawing fortress. Counterplay h5/a3 follow after blockade secures position.. Rejected: h7h5, a4a3.
- llm.reflect17284ms · $0.0062
9. Commit Commit Kc5 (d4c5).
85.c8=Q+Sonnet
1. Observe Halbzug 85, Weiss am Zug. Phase: Endspiel. Weiss +3 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.searxng353ms · fail
5. Plan Phase: endgame. Promote c7→c8=Q immediately — it is White's move and Black king on c5 cannot reach c7 in time. After queening, blockade Black's a4 passer with the queen while the centralized king on e6 controls the kings…
- llm.plan78767ms · $0.0526
full reasoning
Phase: endgame. Promote c7→c8=Q immediately — it is White's move and Black king on c5 cannot reach c7 in time. After queening, blockade Black's a4 passer with the queen while the centralized king on e6 controls the kingside. Mop up h7 with the queen once a4 is neutralized. Leverage the unstoppable c-pawn promotion (confirmed winning file per Chess.com 'Queen vs. Pawn on 7th' — c-file is a knight's file with no stalemate resource) to generate a trivially won Queen + King vs. King + two pawns endgame, advancing White's own queenside pawn majority to force resignation. Critical: Black king c5 is one tempo too slow — c8=Q happens this ply before any interference is geometrically possible; Black's a4 pawn is the only post-promotion danger — queen must blockade or capture it before it advances further; According to Chess.com article on Queen vs. 7th-rank pawns, c-pawn promotions carry no stalemate risk (unlike b or h files), so queening is clean and immediately decisive.
6. Candidates Candidates: c8=Q+ (Promotes c-pawn to queen with check; c-file has no stalemate risk per Chess.com endgame theory.) | bxa4 (Eliminates Black's dangerous a4 passer immediately, removing post-promotion counterplay threat.)…
- chess.js.legal_moves0ms
- llm.candidates10886ms · $0.0035
full reasoning
Candidates: c8=Q+ (Promotes c-pawn to queen with check; c-file has no stalemate risk per Chess.com endgame theory.) | bxa4 (Eliminates Black's dangerous a4 passer immediately, removing post-promotion counterplay threat.) | c8=R+ (Alternative promotion with check; avoids any theoretical stalemate edge cases vs underpromotion.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: c8=Q+ — Promotes to queen with check forcing Black king away from c5, giving White an immediately decisive material advantage. Per Chess.com endgame theory, c-file promotions carry zero stalemate risk, making…
- llm.reflect9635ms · $0.0031
full reasoning
Final pick: c8=Q+ — Promotes to queen with check forcing Black king away from c5, giving White an immediately decisive material advantage. Per Chess.com endgame theory, c-file promotions carry zero stalemate risk, making this clean and winning.. Rejected: b3a4, c7c8r.
9. Commit Commit c8=Q+ (c7c8q).