CHESS BENCHMARK · STANDARD

Claude Opus 5.5 vs Stockfish Skill 2

Standard. Claude Opus 5.5 played White against Stockfish Skill 2 (1,519). Result 0-1, adjudicated: decisive advantage, after 107 plies. All of Claude Opus 5.5's games.

RESULT0-1

ENDED BYadjudicated: decisive advantage

MODEL TIME11.6 min

COST$1.42 (API-equivalent)

TOKENS IN / OUT60,690 / 46,756

REQUESTS57

[Event "Model Cadence Bench"] [Site "https://modelcadence.com/bench/chess"] [Date "????.??.??"] [Round "?"] [White "Claude Opus 5.5"] [Black "Stockfish Skill 2"] [Result "0-1"] 1. e4 c5 2. Nf3 a6 3. c3 Nf6 4. e5 Nd5 5. d4 d6 6. Bc4 Nb6 7. Bb3 c4 8. Bc2 Bg4 9. exd6 e6 10. b3 cxb3 11. Bxb3 Bxd6 12. O-O h6 13. Nbd2 a5 14. a4 O-O 15. Ne4 Re8 16. Nxd6 Qxd6 17. Ba3 Qf4 18. Bc5 N8d7 19. Ba3 Rec8 20. Qd2 Qb8 21. h3 Bxf3 22. gxf3 Qc7 23. Rac1 Qd8 24. Qf4 Nd5 25. Qd2 Qf6 26. Bxd5 exd5 27. Kg2 Rc6 28. Rg1 Qf5 29. Qe2 h5 30. Qe3 Rg6+ 31. Kh2 Raa6 32. Rxg6 Rxg6 33. Rg1 Nb6 34. Rxg6 Qxg6 35. Qe7 Nc4 36. Bc5 Qf6 37. Qxf6 gxf6 38. Kg3 b6 39. Be7 Kh7 40. Bxf6 Kg6 41. Be7 Kh6 42. Bd8 Kg6 43. Kf4 h4 44. Bxh4 b5 45. axb5 f6 46. Bg3 a4 47. b6 Nxb6 48. Ke3 a3 49. Bd6 a2 50. Kd3 a1=Q 51. Kc2 Qa2+ 52. Kd3 Qxf2 53. Bc5 Nc4 54. Bb4 0-1