[Event "Dortmunder Schachtage-12"]
[Site "Dortmund"]
[Date "1984.10.14"]
[Round "4"]
[White "Ostermeyer, Peter"]
[Black "Zapata, Alonso"]
[Result "0-1"]
[WhiteElo "2460"]
[BlackElo "2470"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. f3 d6 6. Be3 e5 7. d5 Nh5 8. Qd2 f5 9. exf5 gxf5 10. O-O-O Nd7 11. Bd3 Ndf6 12. Nge2 Kh8 13. Kb1 a6 14. g3 Bd7 15. Bh6 Qe8 16. h3 b5 17. Rde1 bxc4 18. Bxc4 Bxh6 19. Qxh6 Qf7 20. g4 Ng7 21. Ka1 Rab8 22. Nc1 Rb4 23. b3 Bb5 24. Nxb5 axb5 25. Qd2 bxc4 26. Qxb4 cxb3 27. Qxb3 Nxd5 28. Rd1 c6 29. Rh2 Ne6 30. Rxd5 cxd5 31. Qxd5 fxg4 32. hxg4 Qc7 33. Nb3 Nd4 34. Kb1 Rb8 35. g5 Rb5 36. Qa8+ Kg7 37. Qe4 Kg8 38. Qa8+ Qb8 39. Qe4 Qb7 40. Qxb7 Rxb7 41. Rh6 Nxf3 42. Rxd6 Nxg5 43. Kb2 Kg7 44. a4 Ne4 45. Rd5 Kf6 46. a5 h5 47. Kc2 h4 48. a6 Ra7 49. Kd3 Ng3 50. Nc5 h3 51. Rd6+ Kg5 52. Re6 h2 53. Rxe5+ Kg4 54. Re1 Rf7 55. Ra1 Rf8 56. Kc4 Nf1 0-1