[Event "St Martin op"] [Site "St Martin"] [Date "1992.??.??"] [Round "4"] [White "Gulko, Boris"] [Black "Gamboa, Nelson"] [Result "1-0"] [WhiteElo "2560"] [BlackElo "2405"] [ECO "E42"] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2 O-O 6. a3 cxd4 7. axb4 dxc3 8. Nxc3 d5 9. cxd5 exd5 10. b5 Be6 11. Qd4 a5 12. Bd3 Nbd7 13. f4 g6 14. O-O Rc8 15. f5 gxf5 16. Bxf5 Rc4 17. Qd1 Ne5 18. Ra4 Qd7 19. Rxc4 dxc4 20. Qd4 Qxd4 21. exd4 Ned7 22. Bh6 Re8 23. Bc2 Bg4 24. Bd2 Bh5 25. Re1 Rxe1+ 26. Bxe1 Bg6 27. Bd1 Bh5 28. Bxh5 Nxh5 29. Nd5 Nhf6 30. Ne3 a4 31. Nxc4 Nd5 32. Kf2 f6 33. Kf3 N7b6 34. Nd6 Nd7 35. Nxb7 Kf7 36. Ke4 Nc7 37. Nc5 Nxc5+ 38. dxc5 Nxb5 39. Kd5 Ke7 40. c6 Nc7+ 41. Kc5 Ne6+ 42. Kb6 Kd8 43. Kb7 Nc5+ 44. Kb8 Na6+ 45. Ka7 Nc7 46. Kb7 Nb5 47. c7+ 1-0