[Event "IBM Amsterdam"] [Site "13"] [Date "1973.??.??"] [Round "6"] [White "Radulov, Ivan"] [Black "Spassky, Boris"] [Result "0-1"] [WhiteElo "2530"] [BlackElo "2655"] [Variant "Standard"] [TimeControl "-"] [ECO "B09"] [Opening "Pirc Defense: Austrian Attack, Dragon Formation"] [Termination "Unknown"] [Annotator "lichess.org"] 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5 { B09 Pirc Defense: Austrian Attack, Dragon Formation } 6. dxc5 Qa5 7. Qd3 Qxc5 8. Be3 Qa5 9. Qb5+ Qxb5 10. Bxb5+ Nc6 11. O-O-O a6 12. Bd3?! { (0.91 → -0.07) Inaccuracy. Bxc6+ was best. } (12. Bxc6+ bxc6 13. e5 dxe5 14. fxe5 Nd7 15. e6 fxe6 16. Rhe1 e5 17. h3 O-O 18. b3 Re8) 12... Ng4 13. Bb6 O-O?! { (0.07 → 0.75) Inaccuracy. Bxc3 was best. } (13... Bxc3 14. bxc3) 14. h3 Nf6 15. g4 Nd7 16. Be3 Rb8 17. Ne2?! { (0.23 → -0.61) Inaccuracy. Rhe1 was best. } (17. Rhe1 Re8) 17... b5 18. Kb1 Bb7 19. Ned4 Nc5 20. Nb3 Na4 21. Bc1 Rfc8 22. c3? { (-0.51 → -1.66) Mistake. h4 was best. } (22. h4 Nb4 23. h5 Nc5 24. Nxc5 dxc5 25. hxg6 hxg6 26. Rhe1 Rd8 27. Rd2 Nxd3 28. Rxd3 Rxd3) 22... Rc7?! { (-1.66 → -0.67) Inaccuracy. Bxc3 was best. } (22... Bxc3) 23. Nfd4 Rbc8 24. Nxc6 Bxc6 25. a3? { (0.00 → -1.48) Mistake. Rhe1 was best. } (25. Rhe1 Kf8 26. Nd4 Bd7 27. e5 Rxc3 28. bxc3 Nxc3+ 29. Kc2 Ne2+ 30. Kb1 Nc3+) 25... f5?! { (-1.48 → -0.41) Inaccuracy. Ba8 was best. } (25... Ba8 26. Bd2) 26. gxf5 gxf5 27. Rhe1? { (-0.60 → -2.36) Mistake. Rhg1 was best. } (27. Rhg1 fxe4) 27... fxe4?! { (-2.36 → -1.46) Inaccuracy. Bxe4 was best. } (27... Bxe4) 28. Bc2 d5?! { (-1.20 → -0.53) Inaccuracy. Bxc3 was best. } (28... Bxc3 29. bxc3 Nxc3+ 30. Kb2 Nxd1+ 31. Bxd1 Bd5 32. Bd2 Kf8 33. f5 Rc4 34. Rg1 Bf7 35. Bh6+) 29. Nd4 Bxd4 30. Rxd4 Nb6 31. Rg1+ Kf7 32. Bd1 Rg8?! { (-1.21 → -0.34) Inaccuracy. Bd7 was best. } (32... Bd7) 33. Bh5+ Kf8 34. Rdd1 Rxg1 35. Rxg1 Be8 36. Bg4 Bf7 37. f5 Nc4 38. h4 Rc6 39. Bf4 e3?! { (-1.40 → -0.64) Inaccuracy. a5 was best. } (39... a5) 40. b3 Nd2+ 41. Kb2 d4 42. cxd4 Bxb3 43. Rc1 Rxc1 44. Kxc1 Bd5 45. Bxe3 Nc4 46. Bh6+ Ke8 47. a4 bxa4 48. Be2?! { (-0.39 → -0.97) Inaccuracy. Bh5+ was best. } (48. Bh5+) 48... Nd6 49. Bg5 Nxf5 50. Bxa6 Nxd4 51. Bd3 h5 52. Be3 Nf3 53. Bb5+ Kf7 54. Bxa4 Nxh4 55. Bd1 Kg6 56. Bc2+ Kf6 57. Kd2?! { (-0.94 → -1.92) Inaccuracy. Bb6 was best. } (57. Bb6 Ng2 58. Bd1 h4 59. Kd2 Kf5 60. Ke2 Kf4 61. Kf2 h3 62. Kg1 Ne3 63. Be2 e5) 57... Ng2? { (-1.92 → -0.76) Mistake. Nf3+ was best. } (57... Nf3+ 58. Kd3) 58. Bg1 Bf3 59. Bd3 e5 60. Bf1 Nh4 61. Bb6 Kf5 62. Bd8 Kg4 63. Bb5 Ng2 64. Bd7+ Kg3 65. Bc7 Kf4 66. Bb5 Nh4 67. Ke1 Bg4 68. Bf1 Nf5 69. Kf2 h4 70. Bd3 Ng3 71. Bd8? { (-0.54 → -2.13) Mistake. Kg2 was best. } (71. Kg2 Bd7 72. Kh2 Be6 73. Bb8 Bg4 74. Bc7 Bd7 75. Bb8 Nh5 76. Bf1 Bf5 77. Bh3 Ng3) 71... h3 72. Bh4 Nh5 73. Bg6?! { (-2.27 → -3.64) Inaccuracy. Bb5 was best. } (73. Bb5 e4) 73... e4 74. Bd8?? { (-2.97 → -10.38) Blunder. Kg1 was best. } (74. Kg1 Ng7) 74... e3+ 75. Ke1 Kg3 { Black wins. } 0-1