[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.10.25"]
[Round "1"]
[White "Duchesne, Edward L"]
[Black "Aldrete, Jorge"]
[Result "0-1"]
[BlackElo "2310"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. f3 Nc6 6. Nge2 e5 7. d5 Ne7 8. Bg5 h6 9. Be3 g5 10. Qd2 Nh5 11. g3 Ng6 12. Bg2 Qe7 13. O-O Bd7 14. Nb5 O-O 15. Rac1 Qd8 16. Na3 b6 17. Nb1 a5 18. a3 Kh7 19. b4 axb4 20. axb4 Rg8 21. Kh1 Qe7 22. c5 bxc5 23. bxc5 Rgb8 24. c6 Bc8 25. Nbc3 g4 26. Ra1 Nf6 27. Ra7 Rxa7 28. Bxa7 Ra8 29. Bg1 h5 30. Nb5 h4 31. fxg4 Nxg4 32. h3 Ba6 33. Qa5 Bxb5 34. Qxa8 hxg3 35. Nxg3 Bxf1 36. Bxf1 Qh4 37. Qc8 Nf6 38. Nf5 Qxe4+ 39. Bg2 Qc2 40. Nxg7 Kxg7 41. Qxc7 0-1