[Event "Interzonal-13a"]
[Site "Tunis"]
[Date "1985.05.12"]
[Round "12"]
[White "De Firmian, Nick E"]
[Black "Zapata, Alonso"]
[Result "1-0"]
[WhiteElo "2540"]
[BlackElo "2535"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 6. g3 Nge7 7. Nb3 d6 8. Bg2 Bd7 9. O-O Nc8 10. a4 Be7 11. Qe2 O-O 12. Be3 Na5 13. Nxa5 Qxa5 14. Bd4 Bd8 15. Rfd1 Bc6 16. Qc4 Nb6 17. Qb3 Nd7 18. Qa3 Be7 19. Nd5 Bxd5 20. exd5 e5 21. Be3 Rac8 22. Rac1 f5 23. c4 Qc7 24. a5 e4 25. b4 Ne5 26. c5 Qd7 27. Bf4 Bf6 28. f3 Nd3 29. Rxd3 exd3 30. Qxd3 dxc5 31. bxc5 Qa4 32. Be3 f4 33. gxf4 Rfe8 34. Bf2 Qxf4 35. Rc4 Qe5 36. d6 Rcd8 37. f4 Qa1+ 38. Bf1 Kh8 39. Qd5 Qb1 40. Kg2 Qg6+ 41. Kf3 Qb1 42. Kg2 Qg6+ 43. Bg3 Re3 44. Kf2 Rb3 45. Re4 Rb2+ 46. Kf3 h5 47. Bh3 h4 48. Bf2 Rf8 49. d7 Bg5 50. Qd6 Qxd6 51. cxd6 Kh7 52. Kg4 Bd8 53. Re8 Rg8 54. Bxh4 Bxa5 55. Rxg8 Kxg8 56. d8=Q+ Bxd8 57. Bxd8 Rd2 58. Bc7 1-0