[Event "Olympiad-18 Preliminaries C"]
[Site "Lugano"]
[Date "1968.10.22"]
[Round "5"]
[White "Heyns, Anthon"]
[Black "Yabra, Frederico"]
[Result "1-0"]

1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. d5 d6 5. Nc3 Nf6 6. Be2 O-O 7. O-O a6 8. a4 Bg4 9. Nd2 Bxe2 10. Qxe2 Re8 11. Nc4 e6 12. Bg5 exd5 13. Nxd5 Nc6 14. c3 h6 15. Bxf6 Bxf6 16. Rfd1 Re6 17. Nf4 Be5 18. Nxe6 fxe6 19. Nxe5 Nxe5 20. f4 Nf7 21. Qg4 Qf6 22. f5 exf5 23. exf5 Qxf5 24. Qxf5 gxf5 25. Re1 c4 26. Re7 Rb8 27. Rf1 b5 28. Rxf5 Ne5 29. Rf6 bxa4 30. Rxd6 a3 31. bxa3 Rb1+ 32. Kf2 Nd3+ 33. Kg3 Kf8 34. Ra7 Nc5 35. Rd8# 1-0