[Event "Interzonal-10a"]
[Site "Biel"]
[Date "1976.07.30"]
[Round "14"]
[White "Diaz Diaz, Joaquin Carlos"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "1/2-1/2"]
[BlackElo "2380"]

1. d4 Nf6 2. Bg5 e6 3. e4 h6 4. Bxf6 Qxf6 5. e5 Qd8 6. Nc3 d6 7. Bd3 dxe5 8. dxe5 Bb4 9. Qg4 Bxc3+ 10. bxc3 Qg5 11. Qe4 Nd7 12. Nf3 Qe7 13. Qg4 g6 14. h4 Qc5 15. Qd4 Qxd4 16. cxd4 c5 17. c3 cxd4 18. cxd4 Nb6 19. Be4 Rb8 20. O-O Bd7 21. Rfc1 Ke7 22. Rc7 Rhc8 23. Rxb7 Rxb7 24. Bxb7 Rc3 25. Be4 Ra3 26. Bc2 Ba4 27. Bxa4 Rxa4 28. Kf1 Nd5 29. Ke1 Nb4 30. Kd2 Ra3 31. Ne1 Kd7 32. g3 a5 33. Kc1 Rxa2 34. Rxa2 Nxa2+ 35. Kb2 Nb4 36. Kb3 Kc6 37. Kc4 Nd5 38. Nc2 Nb6+ 39. Kc3 Kb5 40. Ne3 a4 41. g4 g5 42. h5 Kc6 43. Kb2 Nd5 44. Nxd5 Kxd5 45. f4 gxf4 46. g5 f3 47. gxh6 f2 48. h7 f1=Q 49. h8=Q Qb5+ 50. Ka1 Qb3 51. Qd8+ Kc4 52. Qc7+ Kxd4 53. Qxf7 a3 54. Qf4+ Kd5 55. Qh2 a2 56. Qxa2 1/2-1/2