[Event "Olympiad-19 Preliminaries A"]
[Site "Siegen"]
[Date "1970.09.13"]
[Round "9"]
[White "Dusclaux, Jacques"]
[Black "Yabra, Frederico"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. Be3 Nc6 8. O-O O-O 9. f3 Bd7 10. Qd2 Re8 11. Nb3 Rc8 12. Nd5 Nxd5 13. exd5 Ne5 14. Nd4 Nc4 15. Bxc4 Rxc4 16. b3 Rc8 17. c4 e5 18. dxe6 fxe6 19. Rad1 d5 20. cxd5 exd5 21. Rc1 Rxc1 22. Rxc1 Qh4 23. Qf2 Qe7 24. Nc2 Bf5 25. Bxa7 Rc8 26. Re1 Qd7 27. Nd4 Bd3 28. Qe3 Ba6 29. Bb6 Qd6 30. Qe6+ Qxe6 31. Nxe6 Bc3 32. Re3 Bd2 33. Re5 Rc1+ 34. Kf2 Rf1+ 35. Kg3 Be1+ 36. Kh3 Bd3 37. Nd4 1/2-1/2