[Event "Olympiad-20 Preliminaries A"]
[Site "Skopje"]
[Date "1972.09.22"]
[Round "4"]
[White "Pena, Gustavo"]
[Black "Diaz Diaz, Joaquin Carlos"]
[Result "0-1"]
1. d4 c5 2. Nf3 Nf6 3. c4 d6 4. d5 e6 5. e4 exd5 6. cxd5 g6 7. Nc3 Bg7 8. Be2 O-O 9. O-O Bg4 10. a4 a6 11. Nd2 Bxe2 12. Qxe2 Nbd7 13. Nc4 Nb6 14. Bf4 Nxc4 15. Qxc4 Ng4 16. Qe2 Ne5 17. Bg3 Re8 18. f4 Nd7 19. Qd3 Rc8 20. Rae1 c4 21. Qc2 Nc5 22. Re2 Nd3 23. Nd1 b5 24. axb5 axb5 25. Kh1 Qb6 26. Nc3 Qd4 27. f5 Qb6 28. f6 Bh6 29. Nd1 b4 30. Nf2 Qd4 31. Ng4 Bf8 32. Qd2 Rc7 33. Nh6+ Kh8 34. Qg5 c3 35. Nf5 gxf5 36. Bxd6 h6 37. Qh5 Nf2+ 38. Rexf2 Qxf2 39. Rxf2 cxb2 40. g3 b1=Q+ 41. Kg2 Qxe4+ 42. Kg1 Rc1+ 43. Rf1 Qd4+ 44. Kg2 Rc2+ 45. Kh3 Qe4 0-1