Sonnetvsstockfish-1320
Halbzuege (42)
1.e4Sonnet
1. Observe Halbzug 1, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 20. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search6ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Seize central space immediately with a pawn move to e4 or d4, then follow the 'knights before bishops' heuristic: Nf3 next, Nc3 or Bc4/Bb5 after, aiming for castling by move 6–7. No piece development wast…
- llm.plan33731ms · $0.0138
full reasoning
Phase: opening. Seize central space immediately with a pawn move to e4 or d4, then follow the 'knights before bishops' heuristic: Nf3 next, Nc3 or Bc4/Bb5 after, aiming for castling by move 6–7. No piece development wasted on early queen sorties. Build a sound central structure, complete development without pawn weaknesses, and castle kingside early — king safety (heuristic #5) is the non-negotiable foundation before any middlegame initiative is pursued against the 1320 engine. Critical: no opponent threats exist on move 1 — confirmed by heuristic ANTI-ignore-threats check; central control heuristic demands e4 or d4 immediately — half-measures invite opponent equality; queen must stay home until move 6–7 minimum; engine at 1320 ELO misses long-term positional plans — slow, principled play over tactical fireworks.
6. Candidates Candidates: e4 (Seizes central space immediately per heuristic #1; opens lines for bishop and queen, enabling fast development and early castling.) | d4 (Controls center per central control heuristic; leads to solid stru…
- chess.js.legal_moves0ms
- llm.candidates9037ms · $0.0037
full reasoning
Candidates: e4 (Seizes central space immediately per heuristic #1; opens lines for bishop and queen, enabling fast development and early castling.) | d4 (Controls center per central control heuristic; leads to solid structures with less tactical chaos — fits patient, positional Sonnet style.) | Nf3 (Knights before bishops heuristic: develops actively, controls e5/d4, keeps all central pawn options open without committing structure.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: e4 — Seizes maximum central space immediately (heuristic #1: central control). Opens diagonals for Bc4 and the queen, enabling kingside castling by move 5-6 — king safety heuristic demands the fastest route t…
- llm.reflect10341ms · $0.0028
full reasoning
Final pick: e4 — Seizes maximum central space immediately (heuristic #1: central control). Opens diagonals for Bc4 and the queen, enabling kingside castling by move 5-6 — king safety heuristic demands the fastest route to castling.. Rejected: d2d4, g1f3.
9. Commit Commit e4 (e2e4).
2...e6stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: e7e6
- stockfish_uci1003ms
3.Nf3Sonnet
1. Observe Halbzug 3, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 30. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search2ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Develop knight to f3 (knights before bishops heuristic), then decide between d4 central thrust or Bc4/Bb5 development. Aim to castle kingside by move 6–7. No weaknesses in own camp. Build classical centra…
- llm.plan12841ms · $0.0052
full reasoning
Phase: opening. Develop knight to f3 (knights before bishops heuristic), then decide between d4 central thrust or Bc4/Bb5 development. Aim to castle kingside by move 6–7. No weaknesses in own camp. Build classical central structure: e4 secured, d4 to follow if possible. Achieve full development with a sound central pawn presence on e4+d4, castle kingside early, then convert the structural solidity into a quiet positional squeeze against the 1320 engine's horizon-limited defense. Critical: No immediate opponent threats — e6 is passive, no counter-pressure on center yet; Central control heuristic (#1) satisfied by 1.e4; must reinforce with Nf3 to support e4 and control d5; Knights before bishops heuristic (#2) mandates Nf3 before any bishop move — Bc4 or Bb5 comes after; King safety (#5) requires castling path: f1-bishop must develop soon, no pawn moves that disturb kingside; Avoid early queen development entirely per heuristic #3; Opponent (engine) will defend rationally — no hoping for blunders, build position step by step.
6. Candidates Candidates: Nf3 (Knights before bishops heuristic (#2): Nf3 supports e4, controls d5, opens castling path. Classical and sound.) | d4 (Central control heuristic (#1): immediate d4 stakes the center, fights for d5, classi…
- chess.js.legal_moves0ms
- llm.candidates9878ms · $0.0038
full reasoning
Candidates: Nf3 (Knights before bishops heuristic (#2): Nf3 supports e4, controls d5, opens castling path. Classical and sound.) | d4 (Central control heuristic (#1): immediate d4 stakes the center, fights for d5, classical two-pawn center vs passive e6.) | Bc4 (Develops bishop to active diagonal, eyes f7, prepares kingside castle. Sound but bishop before knight is slight deviation.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nf3 — Knights before bishops heuristic (#2) mandates Nf3 first. Supports e4, controls d5, opens f1 for bishop development, and clears the castling path — all without committing the bishop prematurely.. Reject…
- llm.reflect8371ms · $0.0029
full reasoning
Final pick: Nf3 — Knights before bishops heuristic (#2) mandates Nf3 first. Supports e4, controls d5, opens f1 for bishop development, and clears the castling path — all without committing the bishop prematurely.. Rejected: d2d4, f1c4.
9. Commit Commit Nf3 (g1f3).
4...Nf6stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: g8f6
- stockfish_uci1005ms
5.d4Sonnet
1. Observe Halbzug 5, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 28. Criticality: 0.30.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search3ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Play d4 to establish a full central pawn duo on e4+d4, then develop the light-squared bishop to c4 or d3, and castle kingside by move 6–7. Complete development with Nc3 and Be3 to support the center. Buil…
- llm.plan13387ms · $0.0052
full reasoning
Phase: opening. Play d4 to establish a full central pawn duo on e4+d4, then develop the light-squared bishop to c4 or d3, and castle kingside by move 6–7. Complete development with Nc3 and Be3 to support the center. Build a classical e4+d4 center, castle kingside early, then exploit the 1320 engine's horizon limitations with slow queenside expansion (c3–c4 or queenside majority pressure) once development is complete. Critical: No immediate opponent threats: Black's e6+Nf6 are passive and exert no central counter-pressure yet; Memory confirms: central control heuristic (e4+d4) and knights-before-bishops both already satisfied — bishops now need to come out; Risk: delaying d4 cedes initiative and allows Black to equalize with ...d5; must act now while e5 can be answered with e5 push later; Own weakness: none currently — king still on e1 but castling available next 2 moves via Bc4 or Bb5 prep; Opponent horizon: engine at 1320 will not see the long-term positional squeeze forming from the d4 pawn duo — safe to build slowly.
6. Candidates Candidates: d4 (Establishes the full e4+d4 central pawn duo per plan; central control heuristic directly satisfied now.) | Bc4 (Develops light-squared bishop, eyes f7, prepares kingside castle; knights-before-bishops alr…
- chess.js.legal_moves0ms
- llm.candidates8480ms · $0.0035
full reasoning
Candidates: d4 (Establishes the full e4+d4 central pawn duo per plan; central control heuristic directly satisfied now.) | Bc4 (Develops light-squared bishop, eyes f7, prepares kingside castle; knights-before-bishops already done.) | Nc3 (Reinforces e4, completes minor piece development; king safety unaffected, no weaknesses created.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d4 — Central control heuristic demands e4+d4 now — establishes full pawn duo before Black can challenge with ...d5. Memory confirms this is the plan's critical tempo; delaying cedes equality.. Rejected: f1c4,…
- llm.reflect11079ms · $0.0027
full reasoning
Final pick: d4 — Central control heuristic demands e4+d4 now — establishes full pawn duo before Black can challenge with ...d5. Memory confirms this is the plan's critical tempo; delaying cedes equality.. Rejected: f1c4, b1c3.
9. Commit Commit d4 (d2d4).
6...c5stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: c7c5
- stockfish_uci1007ms
7.Nc3Sonnet
1. Observe Halbzug 7, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 37. Criticality: 0.40.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search11ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search4ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Activate the queen's knight toward the center to defend d4 and complete light-piece development — fulfilling the 'knights before bishops' heuristic. Then deploy the light-squared bishop to an active diago…
- llm.plan45781ms · $0.0272
full reasoning
Phase: opening. Activate the queen's knight toward the center to defend d4 and complete light-piece development — fulfilling the 'knights before bishops' heuristic. Then deploy the light-squared bishop to an active diagonal (c4 or d3) and castle kingside. Black's c5 pressure on d4 must be absorbed via active piece play, not passive pawn defense. Maintain the e4+d4 central duo (central control heuristic: without this duo all other plans weaken), neutralize Black's c5 counter-pressure by recapturing dynamically if the pawn exchanges occur, then exploit the d5 outpost and Black's underdeveloped queenside once castling is complete. Critical: Black's c5 pawn threatens ...cxd4, dissolving White's center — the queen's knight must cover d4 and prepare an active recapture; e4 is currently undefended; after ...cxd4 Nxd4, Black may follow with ...Nc6 pressuring e4 and d4 simultaneously — piece coordination is essential before this tension resolves; Own weakness: king uncastled, queenside pieces still on first rank — every tempo spent on anything other than development and castling is a structural liability.
6. Candidates Candidates: Nc3 (Knights before bishops heuristic: Nc3 covers d4 against ...cxd4 and coordinates with Nf3, enabling rapid kingside castling.) | Bc4 (Active diagonal targets f7, maintains e4+d4 central duo, advances kings…
- chess.js.legal_moves0ms
- llm.candidates8523ms · $0.0038
full reasoning
Candidates: Nc3 (Knights before bishops heuristic: Nc3 covers d4 against ...cxd4 and coordinates with Nf3, enabling rapid kingside castling.) | Bc4 (Active diagonal targets f7, maintains e4+d4 central duo, advances kingside castling — core opening principle.) | dxc5 (Dissolves c5 counter-pressure immediately; central control heuristic favors removing the pawn threatening our d4 anchor.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nc3 — Nc3 covers d4 directly against ...cxd4 (central control heuristic), develops the queen's knight per knights-before-bishops principle, and keeps all castling options open. E4 stays defended via the d4-pa…
- llm.reflect9835ms · $0.0032
full reasoning
Final pick: Nc3 — Nc3 covers d4 directly against ...cxd4 (central control heuristic), develops the queen's knight per knights-before-bishops principle, and keeps all castling options open. E4 stays defended via the d4-pawn chain.. Rejected: f1c4, d4c5.
9. Commit Commit Nc3 (b1c3).
8...a6stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: a7a6
- stockfish_uci1025ms
9.Bc4Sonnet
1. Observe Halbzug 9, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 38. Criticality: 0.40.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search3ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Deploy the light-squared bishop to an active diagonal (Bc4 eyes f7, pressures e6), then castle kingside. Maintain the d4+e4 central duo as long as possible — if Black exchanges on d4 we recapture with the…
- llm.plan37376ms · $0.0279
full reasoning
Phase: opening. Deploy the light-squared bishop to an active diagonal (Bc4 eyes f7, pressures e6), then castle kingside. Maintain the d4+e4 central duo as long as possible — if Black exchanges on d4 we recapture with the knight and keep centralization. Black's Nb8 is still idle, giving us a development lead to exploit. Convert White's spatial and developmental edge into a kingside initiative: bishop to c4, castle short, then advance d4-d5 to lock Black's structure and create a strong e5/d5 outpost once Black's bishop on c8 is permanently buried. Critical: Black's c5 pressure on d4 — cxd4 Nxd4 recapture keeps centralization (heuristic: central control, maintain e4+d4 duo as anchor); Nb8 is completely underdeveloped — knights before bishops heuristic confirms White is ahead in piece activity and should exploit this tempo gap; Black's king has not castled; avoid exchanges that simplify before exploiting the king safety imbalance.
6. Candidates Candidates: Bc4 (Eyes f7, opens kingside for castling; heuristic 'king safety first' — prepares 0-0 immediately while pressuring Black's weak f7.) | d5 (Locks central structure, buries Black's c8-bishop permanently; heur…
- chess.js.legal_moves0ms
- llm.candidates11982ms · $0.0042
full reasoning
Candidates: Bc4 (Eyes f7, opens kingside for castling; heuristic 'king safety first' — prepares 0-0 immediately while pressuring Black's weak f7.) | d5 (Locks central structure, buries Black's c8-bishop permanently; heuristic 'pawn structure matters' — creates strong e5 outpost and exploits Black's idle Nb8.) | Bg5 (Pins Nf6, exploiting Black's development lag (Nb8 idle); heuristic 'trade only when you gain' — pin creates immediate pressure without structural concessions.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bc4 — King safety first: Bc4 prepares immediate 0-0 while eyeing f7. Heuristic 'maintain e4+d4 duo' intact — no pawn commitments yet. Black's Nb8 idle means we exploit development lead before locking structur…
- llm.reflect9516ms · $0.0029
full reasoning
Final pick: Bc4 — King safety first: Bc4 prepares immediate 0-0 while eyeing f7. Heuristic 'maintain e4+d4 duo' intact — no pawn commitments yet. Black's Nb8 idle means we exploit development lead before locking structure.. Rejected: d4d5, c1g5.
9. Commit Commit Bc4 (f1c4).
10...d5stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: d7d5
- stockfish_uci1005ms
11.O-OSonnet
1. Observe Halbzug 11, Weiss am Zug. Phase: Eroeffnung. Material gleich. Legale Zuege: 43. Criticality: 0.40.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search6ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search3ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Castle kingside immediately (0-0 is the priority move), then handle the c5/d5 central tension. If Black exchanges on d4, recapture Nxd4 keeping central dominance. Prepare d4-d5 advance to permanently bury…
- llm.plan38229ms · $0.0290
full reasoning
Phase: opening. Castle kingside immediately (0-0 is the priority move), then handle the c5/d5 central tension. If Black exchanges on d4, recapture Nxd4 keeping central dominance. Prepare d4-d5 advance to permanently bury the c8-bishop and create an e5 outpost for the knight. Exploit White's development lead — Black's Nb8 and Bc8 are both idle — by castling fast, then forcing d4-d5 to lock Black's queenside bishop out of the game and convert spatial advantage into a kingside initiative via f3-knight rerouting to e5. Critical: Black's cxd4 or dxe4 exchanges dissolve White's center — must have a recapture plan ready (Nxd4 or Nxe4, not pawn recaptures that weaken structure); White's Bc1 is still undeveloped — after castling, Bg5 or Be3 must follow to complete development; Memory heuristic OPENING central control: d4+e4 duo is the strategic backbone — do not allow it to be dissolved without recentralizing a piece immediately; Memory heuristic OPENING queen late: no queen moves justified yet — the urgency is king safety via 0-0, not early queen activity; Black's Nb8 idleness gives White a full move tempo advantage — must be converted before Black catches up with ...Nbd7 or ...Nc6.
6. Candidates Candidates: O-O (King safety first — the plan demands castling immediately before any central action; converts development lead into initiative.) | exd5 (Central recapture keeps pawn structure sound; after ...exd5 Nxd5 r…
- chess.js.legal_moves0ms
- llm.candidates9360ms · $0.0039
full reasoning
Candidates: O-O (King safety first — the plan demands castling immediately before any central action; converts development lead into initiative.) | exd5 (Central recapture keeps pawn structure sound; after ...exd5 Nxd5 recentralizes knight, exploiting Black's idle Nb8 per heuristic.) | Nxd5 (Nxd5 immediately occupies the dominant central outpost, pressuring Black's underdeveloped queenside before ...Nbd7 can catch up.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: O-O — Memory heuristic KING SAFETY FIRST is non-negotiable here: the king sits on e1 with open central tension. Castling completes development and converts White's tempo lead into initiative — only then handl…
- llm.reflect26296ms · $0.0179
full reasoning
Final pick: O-O — Memory heuristic KING SAFETY FIRST is non-negotiable here: the king sits on e1 with open central tension. Castling completes development and converts White's tempo lead into initiative — only then handle cxd4/dxe4 with piece recaptures (Nxd4/Nxe4), keeping the d4+e4 backbone intact per OPENING CENTRAL CONTROL heuristic.. Rejected: e4d5, c3d5.
9. Commit Commit O-O (e1g1).
12...dxc4stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: d5c4
- stockfish_uci1004ms
13.d5Sonnet
1. Observe Halbzug 13, Weiss am Zug. Phase: Eroeffnung. Schwarz +3 Punkte. Legale Zuege: 33. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search2ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. King is already castled (0-0 done). Now address Black's c4-pawn and the central tension. Play d4-d5 to bury the c8-bishop and claim central space, or recapture cxd4 structure if Black exchanges. Reroute N…
- llm.plan16879ms · $0.0068
full reasoning
Phase: opening. King is already castled (0-0 done). Now address Black's c4-pawn and the central tension. Play d4-d5 to bury the c8-bishop and claim central space, or recapture cxd4 structure if Black exchanges. Reroute Nf3 toward e5 via d2 or d4 to establish a dominant outpost. Develop the c1-bishop before Black consolidates. Convert White's development lead and central space (e4+d4 vs Black's c5+c4 pawns) into a kingside initiative by closing the center with d4-d5, entombing Black's c8-bishop, and using the Nf3-e5 outpost as a long-term positional squeeze. Critical: Black's c4-pawn is advanced but potentially overextended — it fixes White's b2-pawn but also weakens Black's queenside structure; The c8-bishop is completely blocked by pawns on c5, e6, and potentially d6 — d4-d5 locks it in permanently; Memory heuristic [OPENING central control]: maintaining e4+d4 tension or advancing d5 is structurally mandatory — dissolving the center prematurely gives Black queenside counterplay; Memory heuristic [OPENING knights before bishops]: Nc3 is active, Nf3 is active, but Bc1 is still undeveloped — bishop development is the immediate gap to close; Black's queenside is undeveloped (Nb8 idle, Bc8 blocked) — White must act before Black consolidates with ...d6, ...Be7, ...0-0.
6. Candidates Candidates: d5 (Closes center, entombs Black's c8-bishop permanently. Memory: e4+d4 central control is structurally mandatory — d5 is the principled advance.) | Be3 (Develops the idle c1-bishop, addresses the gap flagged…
- chess.js.legal_moves0ms
- llm.candidates8546ms · $0.0038
full reasoning
Candidates: d5 (Closes center, entombs Black's c8-bishop permanently. Memory: e4+d4 central control is structurally mandatory — d5 is the principled advance.) | Be3 (Develops the idle c1-bishop, addresses the gap flagged in memory: knights before bishops done, now bishop development is immediate priority.) | Ne5 (Occupies the dominant central outpost immediately. Supports d5 advance and creates kingside pressure while Black's queenside remains undeveloped.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d5 — d5 entombs Black's c8-bishop permanently behind c5+e6 pawns, closes the center before Black consolidates, and fixes structural gains. Memory heuristics confirm: advancing d5 is structurally mandatory; di…
- llm.reflect39443ms · $0.0302
full reasoning
Final pick: d5 — d5 entombs Black's c8-bishop permanently behind c5+e6 pawns, closes the center before Black consolidates, and fixes structural gains. Memory heuristics confirm: advancing d5 is structurally mandatory; dissolving center prematurely gifts Black queenside counterplay.. Rejected: c1e3, f3e5.
9. Commit Commit d5 (d4d5).
14...Be7stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: f8e7
- stockfish_uci1005ms
15.Be3Sonnet
1. Observe Halbzug 15, Weiss am Zug. Phase: Eroeffnung. Schwarz +3 Punkte. Legale Zuege: 34. Criticality: 0.15.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search3ms
4. Research research: opening_explorer + web_search both disabled — pure memory-only opening plan.
5. Plan Phase: opening. Develop Bc1 — the only undeveloped piece — to e3 or f4 to complete the piece mobilization, per the 'OPENING central control' heuristic: every undeveloped piece dilutes the central pressure built by e4+d5.…
- llm.plan51767ms · $0.0384
full reasoning
Phase: opening. Develop Bc1 — the only undeveloped piece — to e3 or f4 to complete the piece mobilization, per the 'OPENING central control' heuristic: every undeveloped piece dilutes the central pressure built by e4+d5. Simultaneously keep pressure on Black's uncastled king (Ke8 still on e-file) before Black consolidates with 0-0. Do not touch the d5 pawn — it entombs the c8-bishop permanently. Exploit the 'engine horizon' blind spot: the slow positional squeeze of Black's entombed Bc8 + passive Nb8 + c4 overextension is a 7-10 move structural win that a 1320 engine will not evaluate correctly — develop Be3/Bf4, route Nf3 to e5 via d2 or d4, and open central files against the uncastled king before Black can untangle. Critical: Black king uncastled on e8 — central files must stay tense to prevent easy 0-0; Black c4-pawn is advanced but not immediately dangerous — ignore for now, it has no support; c8-bishop is structurally dead behind e6-d5 chain — preserving d5 pawn is non-negotiable; Bc1 is the only idle White piece — developing it this move completes White's mobilization.
6. Candidates Candidates: Be3 (Completes mobilization — 'every undeveloped piece dilutes central pressure'; eyes c5 pawn and supports d4 rerouting of Nf3.) | Bf4 (Develops last idle piece per mobilization heuristic; keeps central tens…
- chess.js.legal_moves0ms
- llm.candidates32345ms · $0.0264
full reasoning
Candidates: Be3 (Completes mobilization — 'every undeveloped piece dilutes central pressure'; eyes c5 pawn and supports d4 rerouting of Nf3.) | Bf4 (Develops last idle piece per mobilization heuristic; keeps central tension against uncastled Ke8, eyes e5 and d6 outpost.) | Ne5 (Centralizes powerfully, threatens Nxc4 recapturing the advanced pawn; maximizes pressure on uncastled Ke8 per king-safety heuristic.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Be3 — Completes mobilization (every undeveloped piece dilutes central pressure) while eyeing c5 and preparing Nd2-e4 reroute. Keeps d5 pawn untouched, preserving Black's entombed Bc8 — the structural long-ter…
- llm.reflect9077ms · $0.0033
full reasoning
Final pick: Be3 — Completes mobilization (every undeveloped piece dilutes central pressure) while eyeing c5 and preparing Nd2-e4 reroute. Keeps d5 pawn untouched, preserving Black's entombed Bc8 — the structural long-term squeeze.. Rejected: c1f4, f3e5.
9. Commit Commit Be3 (c1e3).
16...O-Ostockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: e8g8
- stockfish_uci1006ms
17.d6Sonnet
1. Observe Halbzug 17, Weiss am Zug. Phase: Mittelspiel. Schwarz +3 Punkte. Legale Zuege: 39. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate the rook on f1 by preparing f2-f4 or re-routing it to d1 to support the passed d5-pawn. Meanwhile, deny Black's knight any outpost on e4 or d4 by keeping the bishop on e3 in place. The entombe…
- llm.plan20754ms · $0.0055
full reasoning
Phase: middlegame. Activate the rook on f1 by preparing f2-f4 or re-routing it to d1 to support the passed d5-pawn. Meanwhile, deny Black's knight any outpost on e4 or d4 by keeping the bishop on e3 in place. The entombed Bc8 and passive Nb8 remain structural liabilities to squeeze over 5-7 moves. Convert the space advantage from the d5-pawn into a winning endgame by advancing on the queenside or kingside once Black's pieces remain passive and the Bc8 never escapes. Critical: Black's c4-pawn is a potential outpost-builder — must prevent ...b5-b4 expansion securing it; The 'MIDDLE weak squares outpost' heuristic fires: d6 is a strong outpost for White's knight if Nd4 can be arranged, permanently blocking Black's Bc8; The 'MIDDLE open file rooks' heuristic: the d-file is semi-open for White — Re1 or Rd1 would apply pressure on the passed pawn's file and contest d6; Black king on g8 is castled but the f7-pawn is a latent target if f4-f5 becomes feasible in later moves.
6. Candidates Candidates: Nd4 (Occupies d6 outpost potential; the 'weak squares outpost' heuristic fires — Nd4 eyes d6 permanently, entombing Bc8.) | Re1 (Open file rooks heuristic: activates the rook toward the semi-open d/e-files, s…
- chess.js.legal_moves0ms
- llm.candidates8858ms · $0.0039
full reasoning
Candidates: Nd4 (Occupies d6 outpost potential; the 'weak squares outpost' heuristic fires — Nd4 eyes d6 permanently, entombing Bc8.) | Re1 (Open file rooks heuristic: activates the rook toward the semi-open d/e-files, supporting the d5 passer and contesting d6.) | d6 (Advances the passed pawn to d6, directly blocking Bc8 escape and creating a permanent structural liability for Black.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: d6 — d6 permanently entombs the Bc8 — the 'weak squares outpost' heuristic fires directly. Black cannot capture (Bxd6 loses to Nxd6) and the pawn on d6 is a chronic structural wound, paralyzing the queenside …
- llm.reflect8852ms · $0.0034
full reasoning
Final pick: d6 — d6 permanently entombs the Bc8 — the 'weak squares outpost' heuristic fires directly. Black cannot capture (Bxd6 loses to Nxd6) and the pawn on d6 is a chronic structural wound, paralyzing the queenside indefinitely.. Rejected: f3d4, f1e1.
9. Commit Commit d6 (d5d6).
18...Bxd6stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: e7d6
- stockfish_uci1007ms
19.Nd5Sonnet
1. Observe Halbzug 19, Weiss am Zug. Phase: Mittelspiel. Schwarz +4 Punkte. Legale Zuege: 40. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search4ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Control the open d-file with Rf1-d1 per memory heuristic [MIDDLE open file rooks], then advance Nc3-d5 to claim the dominant outpost per [MIDDLE weak squares outpost]. If Black exchanges on d5 with Nf6…
- llm.plan94862ms · $0.0752
full reasoning
Phase: middlegame. Control the open d-file with Rf1-d1 per memory heuristic [MIDDLE open file rooks], then advance Nc3-d5 to claim the dominant outpost per [MIDDLE weak squares outpost]. If Black exchanges on d5 with Nf6xd5, recapture exd5 yields a strong central passer. All while denying the c4-c3 break until the rook is centralized. Dominate d5 and the d-file to freeze Black's passive major pieces (locked Bc8, idle Nb8, constrained Qd8), converting the positional squeeze into a decisive material or endgame edge within 6-8 moves. Critical: c4-c3 push if Nc3 vacates — exposes c2 pawn immediately; Bd6 diagonal pressure toward h2-g3 kingside cluster; Black can activate Nb8-c6 to contest any White knight landing on d5 or e5.
6. Candidates Candidates: Nd5 (Direct occupation of the dominant outpost per [MIDDLE weak squares outpost]; attacks Nf6, forces Nxd5 exd5 (passer) or Bc7 (knight stays dominant).) | e5 (Gains central space, attacks Nf6 forcing retreat…
- chess.js.legal_moves0ms
- llm.candidates118388ms · $0.0962
full reasoning
Candidates: Nd5 (Direct occupation of the dominant outpost per [MIDDLE weak squares outpost]; attacks Nf6, forces Nxd5 exd5 (passer) or Bc7 (knight stays dominant).) | e5 (Gains central space, attacks Nf6 forcing retreat; if Nf6-d7, Nd5 follows immediately per the outpost plan.) | Re1 (Centralizes the f1-rook toward the d-file per [MIDDLE open file rooks]; improves worst piece, supports e4, prepares Rd1 or Re3-d3.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nd5 — Immediate occupation of the dominant d5 outpost per [MIDDLE weak squares outpost]. Forces Black to either exchange (yielding a strong central passer after exd5) or retreat Bc7, leaving the knight domina…
- llm.reflect8528ms · $0.0030
full reasoning
Final pick: Nd5 — Immediate occupation of the dominant d5 outpost per [MIDDLE weak squares outpost]. Forces Black to either exchange (yielding a strong central passer after exd5) or retreat Bc7, leaving the knight dominant with no challenge.. Rejected: e4e5, f1e1.
9. Commit Commit Nd5 (c3d5).
20...exd5stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: e6d5
- stockfish_uci1022ms
21.Bxc5Sonnet
1. Observe Halbzug 21, Weiss am Zug. Phase: Mittelspiel. Schwarz +7 Punkte. Legale Zuege: 36. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search12ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Per [MIDDLE open file rooks]: activate Rf1-d1 immediately to contest the d-file before Black's rooks reach it. Then per [MIDDLE weak squares outpost]: route Nf3-d4 to attack the undefended c5 pawn and …
- llm.plan70769ms · $0.0543
full reasoning
Phase: middlegame. Per [MIDDLE open file rooks]: activate Rf1-d1 immediately to contest the d-file before Black's rooks reach it. Then per [MIDDLE weak squares outpost]: route Nf3-d4 to attack the undefended c5 pawn and claim a dominant central outpost — forcing Black to react rather than push c4-c3. White is materially behind and cannot afford passive defense. Generate forcing counterplay on the d-file and c5 pawn before Black's c4-c3 break creates an unstoppable queenside passer, using the Nd4 outpost and Rd1 pressure to recover material or force structural concessions that neutralize Black's space advantage. Critical: c4-c3 push is the single most dangerous threat — creates near-unstoppable queenside passer attacking b2; must be preempted by active counterplay, not passive blockade; White is materially behind — the d5+c5+c4 pawn chain is backed by extra minor pieces (Bc8, Nb8 vs nothing); any slow plan loses; Nf3-d4 attacks c5 which has no pawn defender — winning c5 recovers a pawn and disrupts Black's chain; if Black replies d5xd4, Bxd4 recentralizes the bishop powerfully.
6. Candidates Candidates: Nd4 (Core plan: claims dominant outpost, attacks undefended c5 pawn — per [MIDDLE weak squares outpost]; forces Black to react, preempts c4-c3.) | Bxc5 (Immediately recovers a pawn on undefended c5 per plan; …
- chess.js.legal_moves0ms
- llm.candidates39125ms · $0.0338
full reasoning
Candidates: Nd4 (Core plan: claims dominant outpost, attacks undefended c5 pawn — per [MIDDLE weak squares outpost]; forces Black to react, preempts c4-c3.) | Bxc5 (Immediately recovers a pawn on undefended c5 per plan; disrupts Black's d5-c5-c4 chain and neutralizes queenside passer threat.) | exd5 (Opens d-file per [MIDDLE open file rooks]; forces recapture and enables Qxd5 or Nd4 follow-up contesting the central structure.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Bxc5 — Immediately recovers the pawn on the undefended c5 square per [MIDDLE weak squares outpost], dismantling Black's d5-c5-c4 chain and neutralizing the c4-c3 passer threat in one concrete move without del…
- llm.reflect8048ms · $0.0031
full reasoning
Final pick: Bxc5 — Immediately recovers the pawn on the undefended c5 square per [MIDDLE weak squares outpost], dismantling Black's d5-c5-c4 chain and neutralizing the c4-c3 passer threat in one concrete move without delay.. Rejected: f3d4, e4d5.
9. Commit Commit Bxc5 (e3c5).
22...Bxc5stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: d6c5
- stockfish_uci1006ms
23.Rc1Sonnet
1. Observe Halbzug 23, Weiss am Zug. Phase: Mittelspiel. Schwarz +9 Punkte. Legale Zuege: 29. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search4ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Activate the dormant rook to the d-file per [MIDDLE open file rooks] to contest Black's central grip. Then route the knight to d4 per [MIDDLE weak squares outpost], pressuring the advanced bishop and a…
- llm.plan64273ms · $0.0509
full reasoning
Phase: middlegame. Activate the dormant rook to the d-file per [MIDDLE open file rooks] to contest Black's central grip. Then route the knight to d4 per [MIDDLE weak squares outpost], pressuring the advanced bishop and attacking the c4 pawn simultaneously. This double threat forces Black to defend rather than push c4-c3 freely, generating the urgent counterplay White needs given the significant material deficit. Use the knight outpost on d4 and rook pressure on the d-file to recover the c4 pawn or force structural concessions from the bishop pair, narrowing the material gap enough to reach a fighting endgame where technique matters more than raw count. Critical: c4-c3 push creates a dangerous queenside passer that becomes unstoppable if White delays; Bc5 eyes f2 and must be displaced or neutralized via knight pressure on d4 before Black consolidates; e4 pawn is undefended and becomes a tactical target if Nf6 repositions toward e4 or d5.
6. Candidates Candidates: Nd4 ([MIDDLE weak squares outpost] Knight lands on strong d4 outpost, eyes c6/f5, forces Bc5 to concede or retreat under central pressure.) | Rc1 ([MIDDLE open file rooks] Dormant rook activates to semi-open …
- chess.js.legal_moves0ms
- llm.candidates47328ms · $0.0391
full reasoning
Candidates: Nd4 ([MIDDLE weak squares outpost] Knight lands on strong d4 outpost, eyes c6/f5, forces Bc5 to concede or retreat under central pressure.) | Rc1 ([MIDDLE open file rooks] Dormant rook activates to semi-open c-file, directly targeting the advanced c4 passer before it advances to c3.) | Re1 ([MIDDLE open file rooks] Activates king's rook toward the d-file; after queen relocates, Rd1 contests the open d-file and supports Nd4 follow-up.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rc1 — Directly targets the c4 passer per [MIDDLE open file rooks]. Rook on c1 attacks c4 immediately, forcing Black to defend it now rather than push c4-c3. More concrete than Nd4 or Re1 because it creates an…
- llm.reflect9353ms · $0.0034
full reasoning
Final pick: Rc1 — Directly targets the c4 passer per [MIDDLE open file rooks]. Rook on c1 attacks c4 immediately, forcing Black to defend it now rather than push c4-c3. More concrete than Nd4 or Re1 because it creates an immediate material threat without a preparatory move.. Rejected: f3d4, f1e1.
9. Commit Commit Rc1 (a1c1).
24...Bxf2+stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: c5f2
- stockfish_uci1023ms
25.Kh1Sonnet
1. Observe Halbzug 25, Weiss am Zug. Phase: Mittelspiel. Schwarz +10 Punkte. Legale Zuege: 3. Schach! Criticality: 0.45.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search16ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search8ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Halbzug 25, Weiss am Zug. Phase: Mittelspiel. Schwarz +10 Punkte. Legale Zuege: 3. Schach! Criticality: 0.45. Memory: 5 position hit(s) + 3 opponent hit(s). Plan: activate pieces, attack weak pawns, ke…
full reasoning
Phase: middlegame. Halbzug 25, Weiss am Zug. Phase: Mittelspiel. Schwarz +10 Punkte. Legale Zuege: 3. Schach! Criticality: 0.45. Memory: 5 position hit(s) + 3 opponent hit(s). Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Kh1 (King escapes check safely to h1; rook on f2 remains defended, king safety first principle.) | Kxf2 (Captures the attacking bishop, eliminating the immediate threat; trades material to restore king safety…
- chess.js.legal_moves0ms
- llm.candidates12096ms · $0.0035
full reasoning
Candidates: Kh1 (King escapes check safely to h1; rook on f2 remains defended, king safety first principle.) | Kxf2 (Captures the attacking bishop, eliminating the immediate threat; trades material to restore king safety.) | Rxf2 (Rook recaptures bishop, keeping king on g1; trade only when it improves position heuristic applies here.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kh1 — King escapes check safely to h1; rook on f2 remains defended, king safety first principle.. Rejected: g1f2, f1f2. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Kh1 (g1h1).
26...Be3stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: f2e3
- stockfish_uci1006ms
27.Nd4Sonnet
1. Observe Halbzug 27, Weiss am Zug. Phase: Mittelspiel. Schwarz +10 Punkte. Legale Zuege: 29. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Eliminate Black's dominant bishop entrenched deep in our territory — it paralyzes our queenside and attacks f2. After the trade, activate both rooks: the c1 rook belongs on the open or semi-open c-file…
- llm.plan71289ms · $0.0554
full reasoning
Phase: middlegame. Eliminate Black's dominant bishop entrenched deep in our territory — it paralyzes our queenside and attacks f2. After the trade, activate both rooks: the c1 rook belongs on the open or semi-open c-file (memory: MIDDLE open file rooks), and the f1 rook can contest the f-file. Pressure the advanced c4/d5 pawn duo before Black converts the material edge. Trade off Black's most active piece to neutralize the positional grip, then exploit the semi-open c-file with rook pressure against the advanced pawns — the opponent engine (horizon pattern) will miscalculate slow 6-move queenside pressure, which is our only realistic path to surviving a –10 material deficit. Critical: Be3 is an illegal outpost deep in White's camp, attacking f2 and limiting every piece — removing it is priority one (memory: MIDDLE weak squares outpost); Black's c4+d5 pawn duo controls the center; once the bishop trade occurs, d5 becomes a potential IQP-style target (memory: MIDDLE isolated pawn IQP); White king on h1 is exposed — f2 must not fall undefended after any knight move; Black has a significant material lead; White must avoid passive defense and generate active counterplay immediately.
6. Candidates Candidates: Nd4 (Attacks Be3 outpost directly — forces the trade or retreat, neutralizing Black's most dangerous piece per priority one.) | Ne5 (Centralized knight eyes d7/c6, indirectly pressures Be3. Active counterplay…
- chess.js.legal_moves0ms
- llm.candidates14041ms · $0.0086
full reasoning
Candidates: Nd4 (Attacks Be3 outpost directly — forces the trade or retreat, neutralizing Black's most dangerous piece per priority one.) | Ne5 (Centralized knight eyes d7/c6, indirectly pressures Be3. Active counterplay from a strong outpost square.)
7. Verify Alle 2 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Nd4 — Directly attacks the Be3 outpost — priority one per plan. Forces Black to trade or retreat, eliminating the piece paralysing f2 and the queenside. After Nxe3 Qxe3 the c1-rook activates on the semi-open …
- llm.reflect8863ms · $0.0027
full reasoning
Final pick: Nd4 — Directly attacks the Be3 outpost — priority one per plan. Forces Black to trade or retreat, eliminating the piece paralysing f2 and the queenside. After Nxe3 Qxe3 the c1-rook activates on the semi-open c-file, exploiting the c4/d5 duo.. Rejected: f3e5.
9. Commit Commit Nd4 (f3d4).
28...Nxe4stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: f6e4
- stockfish_uci1023ms
29.Ne6Sonnet
1. Observe Halbzug 29, Weiss am Zug. Phase: Mittelspiel. Schwarz +11 Punkte. Legale Zuege: 33. Criticality: 0.00.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search10ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Halbzug 29, Weiss am Zug. Phase: Mittelspiel. Schwarz +11 Punkte. Legale Zuege: 33. Criticality: 0.00. Memory: 5 position hit(s) + 3 opponent hit(s). Plan: activate pieces, attack weak pawns, keep the …
full reasoning
Phase: middlegame. Halbzug 29, Weiss am Zug. Phase: Mittelspiel. Schwarz +11 Punkte. Legale Zuege: 33. Criticality: 0.00. Memory: 5 position hit(s) + 3 opponent hit(s). Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Nc6 (Activate pieces heuristic: knight fork on queen (d8) and rook (a8) forces material gain, keeps the initiative.) | Ne6 (Activate pieces heuristic: Ne6 forks queen (d8) and rook (f8) simultaneously — stron…
- chess.js.legal_moves0ms
- llm.candidates106925ms · $0.0871
full reasoning
Candidates: Nc6 (Activate pieces heuristic: knight fork on queen (d8) and rook (a8) forces material gain, keeps the initiative.) | Ne6 (Activate pieces heuristic: Ne6 forks queen (d8) and rook (f8) simultaneously — strong outpost, maximum knight activity.) | Qf3 (King safety first: attacks the dominating Ne4 neutralising Nf2+ threat; centralises queen per keep-the-initiative heuristic.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Ne6 — Ne6 forks both queen (d8) and rook (f8) simultaneously — per activate-pieces heuristic, this is the maximum knight activity outcome, winning material and keeping the initiative with a forced response fr…
- llm.reflect10389ms · $0.0029
full reasoning
Final pick: Ne6 — Ne6 forks both queen (d8) and rook (f8) simultaneously — per activate-pieces heuristic, this is the maximum knight activity outcome, winning material and keeping the initiative with a forced response from Black.. Rejected: d4c6, d1f3.
9. Commit Commit Ne6 (d4e6).
30...Bxe6stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: c8e6
- stockfish_uci1006ms
31.Qxd5Sonnet
1. Observe Halbzug 31, Weiss am Zug. Phase: Mittelspiel. Schwarz +14 Punkte. Legale Zuege: 28. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Prevent the immediate Nf2+ fork threat (knight e4 forks king h1 and queen d1), challenge Black's dominant outpost on e4, and seek any piece exchange that reduces Black's crushing activity before the c4…
- llm.plan84003ms · $0.0648
full reasoning
Phase: middlegame. Prevent the immediate Nf2+ fork threat (knight e4 forks king h1 and queen d1), challenge Black's dominant outpost on e4, and seek any piece exchange that reduces Black's crushing activity before the c4 pawn advances further. Survive the material deficit by neutralizing Black's most dangerous active pieces — the e4 knight and e3 bishop — through forced tactical exchanges, then construct a defensive setup that makes further conversion difficult for the engine. Critical: IMMEDIATE THREAT: Nf2+ forks king on h1 and queen on d1 — White must either vacate d1 or eliminate the e4 knight this move or face losing the queen; Bishop on e3 threatens Bxg2+ exposing the king after Kxg2 — king safety is critical per identity rules; MIDDLE weak squares outpost applies directly: Ne4 sits on an unassailable outpost — no White pawn can challenge it from c3, f3, or d2, making it a permanent structural problem; MIDDLE open file rooks: White's rook on f1 controls the semi-open f-file and currently guards f2 — moving it abandons that critical defensive function; c4 pawn advance to c3 would shatter White's queenside and the material deficit would become insurmountable.
6. Candidates Candidates: Qxd5 (captures p+centre score=4) | Rxf7 (captures p score=3) | Qd4 (centre score=1) [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: f1f7, d1d4. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Qxd5 (d1d5).
32...Bxd5stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: e6d5
- stockfish_uci1005ms
33.Rxf7Sonnet
1. Observe Halbzug 33, Weiss am Zug. Phase: Mittelspiel. Schwarz +22 Punkte. Legale Zuege: 22. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Neutralize the immediate Nf2+ fork threat by relocating the f1-rook away from the vulnerable square, then activate both rooks toward open files to recapture the advanced c4 pawn and pursue any exchange…
- llm.plan100401ms · $0.0732
full reasoning
Phase: middlegame. Neutralize the immediate Nf2+ fork threat by relocating the f1-rook away from the vulnerable square, then activate both rooks toward open files to recapture the advanced c4 pawn and pursue any exchange eliminating one of Black's dominant active pieces — the e4 knight or e3 bishop — to slow the conversion of a large material advantage. Exploit the open-file rook heuristic by positioning both rooks on the c- and e-files to generate maximum counterplay and win back the c4 pawn, while continuously targeting the e4 outpost knight — the dominant weak-square piece per heuristic — through tactical exchanges, working toward a two-rook defensive structure that complicates Black's conversion. Critical: IMMEDIATE: Nf2+ forks king on h1 and rook on f1 — this move must address it directly or the material deficit worsens catastrophically; Black's e4 knight sits on an untouchable outpost: no White pawn can ever chase it, making it a permanent structural asset for Black; The c4 pawn threatens to advance to c3, creating a passed passer that ties down both White rooks; Be3 restricts king mobility and targets the c1-rook's lateral escape squares; White has zero queenside pawn breaks — the rooks must generate all counterplay or the position collapses passively.
6. Candidates Candidates: Rxf7 (Removes rook from Nf2+ fork, gains f7 pawn, rook on 7th rank enables Rc4 recovering c4 pawn next.) | Rfe1 (Open-file rook heuristic: e1 targets dominant e4 outpost knight directly while eliminating Nf2+…
- chess.js.legal_moves0ms
- llm.candidates58248ms · $0.0485
full reasoning
Candidates: Rxf7 (Removes rook from Nf2+ fork, gains f7 pawn, rook on 7th rank enables Rc4 recovering c4 pawn next.) | Rfe1 (Open-file rook heuristic: e1 targets dominant e4 outpost knight directly while eliminating Nf2+ fork.) | Rg1 (Safe rook relocation; king escapes Nf2+ check to h2 without losing material, keeps structure intact.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rxf7 — Eliminates Nf2+ fork threat while landing rook on 7th rank — concrete material recovery via Rxf7 gains the f7 pawn, and Rc4 follows next move to win back the c4 passer, generating real counterplay.. Re…
- llm.reflect8452ms · $0.0031
full reasoning
Final pick: Rxf7 — Eliminates Nf2+ fork threat while landing rook on 7th rank — concrete material recovery via Rxf7 gains the f7 pawn, and Rc4 follows next move to win back the c4 passer, generating real counterplay.. Rejected: f1e1, f1g1.
9. Commit Commit Rxf7 (f1f7).
34...Bxf7stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: d5f7
- stockfish_uci1011ms
35.Re1Sonnet
1. Observe Halbzug 35, Weiss am Zug. Phase: Mittelspiel. Schwarz +26 Punkte. Legale Zuege: 15. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Per the open-file rooks heuristic: activate Rc1 immediately onto the c4 pawn — sitting passive on c1 while Be3 threatens Bd2 is self-defeating. Win back the c4 pawn, relocate the rook to a dominant ope…
- llm.plan72829ms · $0.0554
full reasoning
Phase: middlegame. Per the open-file rooks heuristic: activate Rc1 immediately onto the c4 pawn — sitting passive on c1 while Be3 threatens Bd2 is self-defeating. Win back the c4 pawn, relocate the rook to a dominant open-file outpost, then push g2-g4/h2-h4 to generate any kingside counterplay. Every tempo we fail to activate costs a full pawn. Survival chess: maximize the single rook's activity on open files (c- or e-file) to claw back the c4 pawn, neutralize the dominant Ne4 outpost heuristic threat (Nf2+ harassment and further infiltration), and establish a pawn phalanx on g4/h4 as the only realistic source of counterplay in a position with catastrophic material deficit. Critical: Be3-d2 on Black's next move directly attacks Rc1 — White must not leave the rook on c1; Ne4 is the dominant weak-square outpost piece per heuristic: it threatens Nf2+ checks and Nd2 rook forks — priority threat to track every move; c4 pawn unchallenged will advance; Rxc4 wins it back but must account for Nd2 reply forking the rook.
6. Candidates Candidates: Re1 (Activates rook on open e-file, flees Be3 attack, targets Ne4 directly per dominant-outpost heuristic.) | g4 (Kingside pawn phalanx per plan — only realistic counterplay source; clamps Ne4 lateral escape.…
- chess.js.legal_moves0ms
- llm.candidates8878ms · $0.0038
full reasoning
Candidates: Re1 (Activates rook on open e-file, flees Be3 attack, targets Ne4 directly per dominant-outpost heuristic.) | g4 (Kingside pawn phalanx per plan — only realistic counterplay source; clamps Ne4 lateral escape.) | Rg1 (Evacuates rook from Be3-d2 fork threat; supports g4-g5 phalanx push on open-file activity heuristic.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Re1 — Activates rook on open e-file, flees Be3 attack, targets Ne4 directly per dominant-outpost heuristic.. Rejected: g2g4, c1g1. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Re1 (c1e1).
36...Qd2stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: d8d2
- stockfish_uci1002ms
37.Rxe3Sonnet
1. Observe Halbzug 37, Weiss am Zug. Phase: Mittelspiel. Schwarz +26 Punkte. Legale Zuege: 17. Criticality: 0.10.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search6ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search2ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Per the open-file rooks heuristic: Re1 must stay active on the e-file or swing to c1 to contest c4 — passive rook play is immediate loss. Per the outpost heuristic: Ne4 is untouchable by pawns and domi…
- llm.plan42777ms · $0.0297
full reasoning
Phase: middlegame. Per the open-file rooks heuristic: Re1 must stay active on the e-file or swing to c1 to contest c4 — passive rook play is immediate loss. Per the outpost heuristic: Ne4 is untouchable by pawns and dominates f2/d2/g3; we cannot dislodge it, so we must route around it. Push g2-g4 to generate the only kingside pawn tension available. Every tempo lost accelerates Qd2's winning threats. With queen, knight, and bishop all deeply infiltrated, White's sole survival path is maximum rook activity on open files (e- or c-file) to force Black to spend tempi defending rather than queening c4 or delivering checkmate via Qd2-penetration patterns. Critical: Qd2 threatens Qxc2 and Qxe1+ check patterns — must calculate king escapes before every rook move; Ne4 on dominant outpost covers f2/g3/d2/c3 — Nf2+ fork threat (Re1 + Kh1) is the immediate tactical alarm; c4 passed pawn advances freely if Re1 leaves e-file — blockade or capture must be the rook's primary mission.
6. Candidates Candidates: Rxe3 (Eliminates Be3 outpost piece; per open-file rooks heuristic, rook becomes active on 3rd rank, removing key attacker.) | Rc1 (Per open-file rooks heuristic, Rc1 contests c4 passed pawn directly — blockad…
- chess.js.legal_moves0ms
- llm.candidates8933ms · $0.0040
full reasoning
Candidates: Rxe3 (Eliminates Be3 outpost piece; per open-file rooks heuristic, rook becomes active on 3rd rank, removing key attacker.) | Rc1 (Per open-file rooks heuristic, Rc1 contests c4 passed pawn directly — blockade mission, forces Black to defend rather than queen.) | g4 (Generates only available kingside pawn tension per plan; Ne4 dominant outpost cannot be challenged — g4 disrupts g3/f5 escape squares.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Rxe3 — Eliminates Be3 outpost piece; per open-file rooks heuristic, rook becomes active on 3rd rank, removing key attacker.. Rejected: e1c1, g2g4. [LLM note: Claude CLI subprocess timed out after 120000ms]
9. Commit Commit Rxe3 (e1e3).
38...Qd1+stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: d2d1
- stockfish_uci1004ms
39.Re1Sonnet
1. Observe Halbzug 39, Weiss am Zug. Phase: Mittelspiel. Schwarz +23 Punkte. Legale Zuege: 1. Schach! Criticality: 0.55.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search7ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: middlegame. Halbzug 39, Weiss am Zug. Phase: Mittelspiel. Schwarz +23 Punkte. Legale Zuege: 1. Schach! Criticality: 0.55. Memory: 5 position hit(s) + 3 opponent hit(s). Plan: activate pieces, attack weak pawns, ke…
full reasoning
Phase: middlegame. Halbzug 39, Weiss am Zug. Phase: Mittelspiel. Schwarz +23 Punkte. Legale Zuege: 1. Schach! Criticality: 0.55. Memory: 5 position hit(s) + 3 opponent hit(s). Plan: activate pieces, attack weak pawns, keep the initiative. [LLM-Error: Claude CLI subprocess timed out after 120000ms]
6. Candidates Candidates: Re1 (Only legal move. Blocks d1-queen check, keeps rook active. King safety first — no choice.)
- chess.js.legal_moves0ms
- llm.candidates6889ms · $0.0013
7. Verify Alle 1 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Re1 — Only legal move. Blocks d1-queen check, keeps rook active. King safety first — no choice.. Rejected: —.
9. Commit Commit Re1 (e3e1).
40...Nf2+stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: e4f2
- stockfish_uci1020ms
41.Kg1Sonnet
1. Observe Halbzug 41, Weiss am Zug. Phase: Endspiel. Schwarz +23 Punkte. Legale Zuege: 1. Schach! Criticality: 0.55.
- material-counter0ms
2. Recall Position recall: 5 similar position(s) found (limit=5).
- nex_search8ms
3. Recall Opponent 3 pattern(s) found for Stockfish-class engine (tag=chess-engine-style).
- nex_entity_search3ms
4. Research middlegame/endgame — research not relevant when both tools off.
5. Plan Phase: endgame. Escape the knight check on h1 with the sole legal king move. Philidor/Lucena rook-ending memory heuristics are structurally inapplicable here — White must survive a mating net first. Opponent-engine-defen…
- llm.plan94386ms · $0.0725
full reasoning
Phase: endgame. Escape the knight check on h1 with the sole legal king move. Philidor/Lucena rook-ending memory heuristics are structurally inapplicable here — White must survive a mating net first. Opponent-engine-defense memory confirms Black will find forced mate efficiently; only stalemate tricks or a perpetual offer any escape. White is terminally down material (+23) under a near-forced mate; the only coherent goal is to keep the Re1 active on the first rank after king moves, exploit the engine-horizon memory pattern by maneuvering slowly to confuse the 1320 engine's search depth, and hunt for a stalemate or rook-perpetual trap before Black's mating net fully closes. Critical: Nf2 controls h1/g4/d1 — only Kg1 is legal, stepping directly into Black queen-and-knight coordination; Re1 is the sole defensive resource: if queen trades or rook is driven off the first rank, mate is immediate; Engine-defense pattern (memory): no blunder expected from the 1320 engine — do not count on defensive collapse; only a stalemate trick or perpetual is realistic resistance.
6. Candidates Candidates: Kg1 (Sole legal move: escape Nf2 check. Re1 stays active on first rank — only defensive resource against mating net.) | Kg1 (King safety first: no alternative exists. Re1 must hold rank-1 to delay queen-and-k…
- chess.js.legal_moves0ms
- llm.candidates8536ms · $0.0037
full reasoning
Candidates: Kg1 (Sole legal move: escape Nf2 check. Re1 stays active on first rank — only defensive resource against mating net.) | Kg1 (King safety first: no alternative exists. Re1 must hold rank-1 to delay queen-and-knight forced mate.) | Kg1 (Only move. Post-king-move, Re1 activity and stalemate-trap patience are the sole survival heuristics applicable.)
7. Verify Alle 3 Kandidaten legal. cloud_eval disabled (default).
- chess.js.legal_recheck0ms
8. Reflect Final pick: Kg1 — Sole legal move — Nf2 controls h1 exit squares, Kg1 is forced. Re1 stays on rank-1, the only defensive resource delaying queen-and-knight mating net.. Rejected: h1g1.
- llm.reflect6846ms · $0.0021
9. Commit Commit Kg1 (h1g1).
42...Qxe1#stockfish-1320
- 1. Observe— missing —
- 2. Recall Position— missing —
- 3. Recall Opponent— missing —
- 4. Research— missing —
- 5. Plan— missing —
- 6. Candidates— missing —
- 7. Verify— missing —
- 8. Reflect— missing —
9. Commit Engine stockfish-1320 (stockfish UCI_Elo 1320) pick: d1e1
- stockfish_uci1005ms
PGN
PGN anzeigen
[Event "Calibration chess-sonnet-tm vs stockfish-1320"] [Site "?"] [Date "2026-05-29"] [Round "?"] [White "chess-sonnet-tm"] [Black "stockfish-1320"] [Result "*"] 1. e4 e6 2. Nf3 Nf6 3. d4 c5 4. Nc3 a6 5. Bc4 d5 6. O-O dxc4 7. d5 Be7 8. Be3 O-O 9. d6 Bxd6 10. Nd5 exd5 11. Bxc5 Bxc5 12. Rc1 Bxf2+ 13. Kh1 Be3 14. Nd4 Nxe4 15. Ne6 Bxe6 16. Qxd5 Bxd5 17. Rxf7 Bxf7 18. Re1 Qd2 19. Rxe3 Qd1+ 20. Re1 Nf2+ 21. Kg1 Qxe1# *