[Event "Olympiad-20 Preliminaries A"]
[Site "Skopje"]
[Date "1972.09.23"]
[Round "5"]
[White "Pena, Gustavo"]
[Black "Stull, Norbert"]
[Result "0-1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Qd2 a6 8. Bd3 Rb8 9. Nge2 Bd7 10. O-O e5 11. d5 Ne7 12. c5 Ne8 13. Rac1 f5 14. f4 fxe4 15. Bxe4 Nf5 16. Bf2 exf4 17. Nxf4 dxc5 18. Bxc5 Ned6 19. Bd3 Qg5 20. Kh1 Rbe8 21. Rce1 Bh6 22. Qc2 Rxe1 23. Rxe1 Qxf4 24. Ne4 Bg7 25. g3 Qf3+ 26. Kg1 Nd4 27. Qd2 Qxe4 28. Bxe4 Nxe4 29. Bxf8 Nxd2 30. Re7 Bxf8 31. Rxd7 Bd6 32. Rd8+ Kg7 33. Rb8 b6 34. Kf2 Nc4 35. b3 Ne5 36. Ke3 Nf5+ 37. Ke4 Ng4 38. Ra8 a5 39. Kd3 Nxh2 40. Kc4 Bxg3 41. Kb5 h5 42. Kc6 Ne7+ 0-1