[Event "Interzonal-10a"]
[Site "Biel"]
[Date "1976.07.12"]
[Round "2"]
[White "Castro Rojas, Oscar Humberto"]
[Black "Andersson, Ulf"]
[Result "0-1"]
[WhiteElo "2380"]
[BlackElo "2585"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. g3 a6 7. Bg2 d6 8. O-O Be7 9. Re1 Bd7 10. Nxc6 Bxc6 11. Ne2 b6 12. Nd4 Bb7 13. a4 Nf6 14. b3 O-O 15. c4 Nd7 16. Ra2 Rfe8 17. Rae2 Nc5 18. Bb2 Bf8 19. Re3 Rab8 20. h3 Ba8 21. Rc3 Rec8 22. Re2 Qd8 23. Ba3 Rc7 24. Kh2 Qd7 25. Rc1 Re8 26. Re3 Rcc8 27. Ne2 Qa7 28. Bb2 Qb8 29. Nc3 Bc6 30. Rb1 Rc7 31. Bf1 Qa8 32. Bg2 Rcc8 33. Ra1 Qb8 34. Bf1 Red8 35. Bg2 Rc7 36. Ra2 Be8 37. Ba3 Be7 38. Bb4 Rcc8 39. Bf1 Bg5 40. Re1 Bf6 41. Re3 a5 42. Bxc5 dxc5 43. Rd2 Bc6 44. Bg2 Bxc3 45. Rxc3 e5 46. Rxd8+ Rxd8 47. Rd3 Rd4 48. f3 Qd6 49. Bf1 Kf8 50. Be2 Ke7 51. Qd2 h6 52. Qc2 Bd7 53. Bf1 g5 54. g4 Qf6 55. Kg2 Qf4 56. Qe2 h5 57. Qe3 Qf6 58. Be2 Kd6 59. Rd1 Be6 60. Rd3 Kc6 61. Qd2 Qd8 62. Qe3 f6 63. Qd2 Kc7 64. Bf1 Bf7 65. Qe3 Be8 66. Qd2 Bc6 67. Kg3 Qh8 68. Kg2 Qh7 69. Qe3 Be8 70. Be2 Qd7 71. Qd2 Bf7 72. Kf2 Be6 73. Kg2 Qe8 74. Bf1 Bd7 75. Be2 Bc6 76. Qe3 Kb7 77. Kf2 Qh8 78. Kg2 Ka7 79. Qd2 hxg4 80. hxg4 Qh4 81. Qd1 f5 82. Rxd4 cxd4 83. gxf5 g4 84. Qf1 Qg5 85. fxg4 Bxe4+ 86. Kg3 Qe3+ 87. Kh4 d3 88. Bd1 d2 89. Qe2 Qh6+ 90. Kg3 Qf4+ 91. Kh3 Bc6 92. f6 Qh6+ 93. Kg3 Qf4+ 94. Kh3 e4 95. f7 Kb7 96. Kh4 Qxf7 97. Qxd2 Qe7+ 98. Kh3 e3 99. Qe2 Qh7+ 100. Kg3 Qc7+ 101. Kh3 Qf4 102. Qe1 Bf3 103. Bxf3+ Qxf3+ 104. Kh2 e2 105. Kg1 Kc7 106. c5 Qe3+ 107. Kg2 bxc5 108. Qxa5+ Kd6 109. Qe1 Ke5 110. g5 Kf5 111. Qf2+ Ke4 112. Qe1 Qf3+ 113. Kh2 0-1