[Event "Chess Olympiad"] [Site "Istanbul TUR"] [Date "2012.08.31"] [Round "4.47"] [White "Oswaldo Zambrana"] [Black "Pavel Vorobjov"] [Result "1/2-1/2"] [WhiteElo "2471"] [BlackElo "2156"] [ECO "B90"] [Opening "Sicilian: Najdorf"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. Qe2 e6 8. O-O-O Be7 9. f4 Qc7 10. Nf3 e5 11. f5 b5 12. a3 Bb7 13. Kb1 Rc8 14. Bxf6 Nxf6 15. g4 Nxg4 16. Rg1 Nf6 17. Rxg7 Nh5 18. Rg1 Nf4 19. Qd2 Qb6 20. Rg4 b4 21. axb4 Qxb4 22. f6 Bxf6 23. Qxd6 Qxd6 24. Rxd6 Rxc3 25. bxc3 Ke7 26. Rb6 Bxe4 27. Ng5 Bd5 28. c4 Ba8 29. Bd3 h5 30. Rg1 e4 31. Bxe4 Bd4 32. Re1 Bxb6 33. Bxa8+ Kf6 34. Ne4+ Kg6 35. Bc6 Rb8 36. Rf1 f5 37. Ka2 Ne2 38. Re1 Nd4 39. Rg1+ Kh6 40. Nd6 Nxc6 41. Nxf5+ Kh7 42. Rg7+ Kh8 43. Rg5 Nd4 44. Rxh5+ Kg8 45. Ne7+ Kg7 46. c5 Bd8 47. Nd5 Nxc2 48. Re5 Rb5 49. Nc3 Ra5+ 50. Kb3 Bf6 51. Rd5 Ra3+ 52. Kxc2 Rxc3+ 53. Kd2 a5 54. h4 a4 55. Rd7+ Kg6 56. Ra7 Rc4 57. c6 Bb2 58. Kd3 Rc3+ 59. Kd4 a3 60. Kd5 Kf5 61. Rf7+ Kg4 62. Ra7 Kxh4 63. c7 Bc1 64. Ra4+ Kg5 65. Rc4 Rxc4 66. Kxc4 a2 67. c8=Q a1=Q 68. Qg8+ Kf5 69. Qh7+ Kg4 70. Qd7+ Kf3 71. Qd5+ Kg3 {#d} 1/2-1/2