[Event "Olympiad-20 Preliminaries A"]
[Site "Skopje"]
[Date "1972.09.21"]
[Round "3"]
[White "Pena, Gustavo"]
[Black "Sloth, Jorn"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bd2 O-O 5. a3 Bxc3 6. Bxc3 Ne4 7. Qc2 Nxc3 8. Qxc3 d6 9. e4 e5 10. dxe5 dxe5 11. Rd1 Qe7 12. Be2 a5 13. Nf3 Nc6 14. h3 f6 15. O-O Be6 16. c5 Qf7 17. b4 axb4 18. axb4 Kh8 19. b5 Na5 20. b6 Nb3 21. Rd3 cxb6 22. cxb6 Rfc8 23. Qb2 Nc5 24. Ra3 Rxa3 25. Qxa3 Nxe4 26. Rc1 Rxc1+ 27. Qxc1 Qe7 28. Qe3 Nd6 29. Qc5 Kg8 30. Nd2 Kf7 31. Bf3 Kf8 32. Qa3 f5 33. Bd1 Kf7 34. Nf3 Nc4 35. Qa1 Kf6 36. Bb3 Qd6 37. Bxc4 Bxc4 38. Qc1 Be6 39. Qg5+ Kf7 40. Qh5+ Kf8 41. Qxh7 e4 42. Ng5 Qd8 43. Kh2 Qd6+ 44. Kg1 Qd1+ 1/2-1/2