[Event "Interzonal-11b"]
[Site "Rio de Janeiro"]
[Date "1979.09.28"]
[Round "5"]
[White "Bronstein, Luis Marcos"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[WhiteElo "2420"]
[BlackElo "2525"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 Nge7 7. dxe5 Nxe5 8. Bb3 N7g6 9. O-O Bb5 10. Re1 Nxf3+ 11. Qxf3 Ne5 12. Qg3 h5 13. h4 Be7 14. Bg5 Bxg5 15. Qxg5 Qxg5 16. hxg5 Nd3 17. Re3 Nxb2 18. Nd2 Na4 19. e5 d5 20. Bxd5 Rd8 21. c4 Bxc4 22. Bxc4 Rxd2 23. e6 f5 24. gxf6 gxf6 25. e7 Nb6 26. Bd3 Rg8 27. Be2 Rh8 28. Re1 Nd5 29. Rb3 b5 30. Ra3 Nb4 31. Bxb5+ c6 32. Rxa6 Nxa6 33. Bxc6+ Rd7 34. Re6 Nc7 35. Bxd7+ Kxd7 36. Rxf6 Kxe7 37. Rf4 Ne6 38. Re4 Kf6 39. a4 Rb8 40. Kh2 Rb2 41. Kg3 Ra2 42. Rc4 Kg5 43. f4+ Kf5 44. Rb4 Ng7 45. Kh3 Ra3+ 46. g3 Ne8 47. Rb5+ Kg6 48. Rg5+ Kh6 49. a5 Nf6 50. Rb5 Ra2 51. Rb6 Kg6 52. a6 Kf5 53. Rb5+ Kg6 54. Rb6 Ra5 55. Re6 Ra3 56. Rb6 Kf5 57. Rb5+ Kg6 58. Rb6 Ra1 59. Rc6 Kf5 60. Rc5+ Ke4 61. Kh4 Rxa6 62. Kg5 Kd4 63. Rb5 Ke3 64. Rb3+ Kf2 65. f5 Ne4+ 66. Kxh5 Nxg3+ 67. Kg5 Ra5 68. Kg4 Ra4+ 69. Kg5 Ne4+ 70. Kg6 Ra6+ 71. Kg7 Nd6 72. Kg6 Ne4+ 73. Kg7 Ng3 74. Rxg3 Kxg3 75. f6 Kg4 76. f7 Ra7 1/2-1/2