[Event "5th North Am.CC (ACM)"] [Site "San Diego USA"] [Date "1974.11.12"] [Round "4"] [White "Ribbit"] [Black "Chess 4.0"] [Result "1-0"] [WhiteElo "?"] [BlackElo "?"] [Variant "Standard"] [TimeControl "-"] [ECO "B22"] [Opening "Sicilian Defense: Alapin Variation, Barmen Defense, Central Exchange"] [Termination "Normal"] [Annotator "lichess.org"] 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 cxd4 5. cxd4 Nc6 6. Nf3 Bg4 { B22 Sicilian Defense: Alapin Variation, Barmen Defense, Central Exchange } 7. Nc3 Qd6? { (0.58 → 1.94) Mistake. Bxf3 was best. } (7... Bxf3 8. Nxd5) 8. d5 Nb4? { (1.78 → 3.13) Mistake. Ne5 was best. } (8... Ne5 9. Bb5+) 9. Bb5+ Bd7 10. Bxd7+ Kxd7? { (3.62 → 5.90) Mistake. Qxd7 was best. } (10... Qxd7) 11. Be3?! { (5.90 → 4.49) Inaccuracy. a3 was best. } (11. a3) 11... Qa6?! { (4.49 → 6.30) Inaccuracy. Na6 was best. } (11... Na6 12. Ng5) 12. Ne5+ Ke8 13. a3 Qd6?! { (5.96 → 17.16) Inaccuracy. Na2 was best. } (13... Na2 14. Rxa2 g6 15. d6 exd6 16. Qd5 dxe5 17. Qxe5+ Ne7 18. Qxh8 Nf5 19. Ra1 Nxe3 20. fxe3) 14. Qa4+ Nc6 15. dxc6 bxc6 16. Nxc6 e5 17. Nxa7+ Qd7 18. Qxd7+?! { (11.75 → 6.60) Inaccuracy. Ncb5 was best. } (18. Ncb5 Rxa7 19. Bxa7 Ke7 20. Bc5+ Kf6 21. Bxf8 Kg6 22. Rd1 Qf5 23. Nd6 Qf4 24. Qc2+ e4) 18... Kxd7 19. Rd1+ Ke6 20. O-O Nf6 21. b4 Be7 22. h3 h5 23. Rfe1 h4 24. Rd3 e4 25. Bd4 Rhe8 26. Bxf6 Bxf6 27. Rxe4+ Kf5 28. Rxe8 Rxe8 29. g4+ hxg3 30. fxg3 Re1+ 31. Kf2 Rc1 32. g4+ Kg6 33. Ne4 Be5 34. b5 Rc2+ 35. Kf3 Rh2 36. Nf2 Bf6 37. Rd6 Kh7 38. Rd5 Bb2 39. Kg3 Rxf2 40. Kxf2 Bxa3?! { (19.85 → Mate in 15) Checkmate is now unavoidable. Bc1 was best. } (40... Bc1 41. b6) 41. b6 Bc1 42. b7 Bf4 43. Nc6 Bc7 44. Rd7 Bf4 45. Rxf7 Bd6 46. b8=Q Bxb8 47. Nxb8 Kg6 48. Rf5 Kh6 49. Nd7 g6 50. Rf6 Kg5 51. Kg3 Kh6 52. Ne5 Kg7 53. g5 Kg8 54. Nxg6 Kh7 55. h4 Kg8 56. h5 Kg7 57. h6+ Kh7 58. Ne5 Kh8 59. g6 Kg8 60. Kg4 Kh8 61. Rf8# { White wins by checkmate. } 1-0