CHESS BENCHMARK · CHESS960

Claude Opus 5.5 vs Stockfish 1320

Chess960. Claude Opus 5.5 played Black against Stockfish 1320 (1,320). Result 1-0, adjudicated: decisive advantage, after 150 plies. All of Claude Opus 5.5's games.

RESULT1-0

ENDED BYadjudicated: decisive advantage

MODEL TIME16.5 min

COST$2.15 (API-equivalent)

TOKENS IN / OUT98,450 / 67,973

REQUESTS78

[Event "Model Cadence Bench"] [Site "https://modelcadence.com/bench/chess"] [Date "????.??.??"] [Round "?"] [White "Stockfish 1320"] [Black "Claude Opus 5.5"] [Result "1-0"] [FEN "bnnrqbkr/pppppppp/8/8/8/8/PPPPPPPP/BNNRQBKR w KQkq - 0 1"] [SetUp "1"] [Variant "Chess960"] 1. h4 e5 2. e4 Nc6 3. b3 Bc5 4. Rh3 Nd6 5. c3 O-O 6. d4 exd4 7. cxd4 Bb4 8. Nd2 Nxe4 9. Qxe4 Qxe4 10. Nxe4 Rfe8 11. Ng3 d5 12. h5 Re1 13. Rxe1 Bxe1 14. Nf5 g6 15. Ne3 Bd2 16. Bb2 Bxe3 17. fxe3 Re8 18. a4 Nb4 19. Bc3 Nc6 20. Nd3 Kg7 21. Nf2 Re6 22. e4 Ne7 23. Bb2 dxe4 24. d5+ Rf6 25. a5 Nxd5 26. g3 e3 27. Bxf6+ Kxf6 28. Nd1 gxh5 29. Rh4 Kg5 30. Re4 Kf5 31. Rd4 Ke5 32. Rc4 c6 33. Nb2 b5 34. Rc2 Nb4 35. Nd3+ Nxd3 36. Bxd3 Kd4 37. Bf5 c5 38. Kf1 Bf3 39. Ke1 c4 40. bxc4 bxc4 41. Rb2 c3 42. Ra2 Bd5 43. Ra4+ Kc5 44. Rf4 c2 45. Bxc2 Be6 46. Bd1 h4 47. Rxh4 Kb5 48. Rh5+ Kc4 49. g4 h6 50. Re5 Kd3 51. Rb5 Bc4 52. Rb7 Bd5 53. Rd7 Ke4 54. Be2 Be6 55. Rxa7 Bd5 56. Rc7 Kf4 57. a6 Ke4 58. Rb7 Bc6 59. Rxf7 Kd4 60. Ra7 Kc5 61. Rc7 Kb6 62. Rh7 Be4 63. a7 Bb7 64. Bb5 Kxa7 65. Bc4 Kb6 66. Bf1 Bc8 67. Rxh6+ Kc7 68. Rg6 Kd7 69. Ke2 Ke7 70. g5 Kf7 71. Rc6 Bg4+ 72. Ke1 Kg7 73. Be2 Bf5 74. Rf6 Bc2 75. Bc4 Bb1 1-0