[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.10.25"]
[Round "1"]
[White "Donoso Velasco, Pedro H"]
[Black "Weeramantry, Sunil"]
[Result "1-0"]
[WhiteElo "2405"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 O-O 6. O-O Bg4 7. Be3 Nc6 8. Qd2 e5 9. dxe5 dxe5 10. Rad1 Qc8 11. h3 Bxf3 12. Bxf3 Rd8 13. Qc1 Rxd1 14. Rxd1 Qf8 15. Nb5 Rc8 16. c3 a6 17. Na3 Rd8 18. b4 b6 19. Nc4 Rxd1+ 20. Qxd1 Bh6 21. Qa4 Nb8 22. Bxh6 Qxh6 23. Qd1 Nbd7 24. a4 Qf8 25. a5 b5 26. Ne3 Qd6 27. Qxd6 cxd6 28. c4 bxc4 29. Nxc4 d5 30. exd5 e4 31. Bg4 Nb8 32. Nb6 Nxg4 33. hxg4 Kf8 34. Kf1 Ke7 35. Ke2 Kd6 36. Ke3 Ke5 37. g5 Kf5 38. Kd4 Kxg5 39. Kxe4 Kf6 40. Na4 Ke7 41. Nc5 Kd6 42. Kd4 f5 43. b5 1-0