Piatigorsky Cup 2nd
 
Santa Monica / 1966
 
Black: Ivkov, Borislav
 

 
White: Unzicker, Wolfgang

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B92: Sicilian, Najdorf, Opocensky Variation (6.Be2)
 

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. Be3 Be6 10. f4 exf4 11. Bxf4 Nc6 12. Kh1 Rc8 13. Qe1 Ne5 14. Rd1 Nfd7 15. Nd4 Qb6 16. Bc1 Rfe8 17. Qg3 Bf8 18. Nf5 Kh8 19. Rxd6 Qa5 20. Rdd1 b5 21. a3 Bxf5 22. exf5 Bxa3 23. Nxb5 Rxc2 24. Nd4 Rxc1 25. Rxc1 Bxb2 26. Rcd1 Nf6 27. Qb3 Bc3 28. Bf3 Qc5 29. Rc1 Qxd4 30. Qxc3 Qxc3 31. Rxc3 h5 32. Re3 Nfg4 33. Bxg4 hxg4 34. f6 gxf6 35. Rxf6 Rb8 36. Kg1 Rb1+ 37. Kf2 Rb2+ 38. Kg3 Kg7 39. Rxa6 f6 40. Ra5 Nc4 41. Re7+ Kg6 42. Rc5 Nd6 43. Kxg4 Rxg2+ 44. Kh3 Ra2 45. Rec7 Ne4 46. Rc2 Ra3+ 47. Kg4 Nd6 48. Rg2 Ra4+ 49. Kf3+ Kf5 50. Rc5+ Ke6 51. Re2+ Kf7 52. Rc7+ Kg6 53. Rg2+ Kf5 54. Rc5+ Ke6 55. Re2+ Kf7 56. Rd5 Nc4 57. Rf5 Kg6 58. Rf4 Ne5+ 59. Kg3 Ra3+ 60. Kg2 Kg5 61. Ref2 Ra6 62. Rf5+ Kg6 63. h3 Nd3 64. Rf1 Ne5 65. Kh2 Nf7 66. R5f4 Ne5 67. R4f2 Rb6 68. Rg2+ Kf7 69. h4 Ng6 70. h5 Ne5 71. h6 Rb8 72. Rg7+ Ke6 73. h7 Rh8 74. Kg3 f5 75. Rh1 Kf6 76. Rg8 f4+ 77. Kxf4 Ng6+ 78. Ke4 (White wins)