[Event "Olympiad-18 Final D"]
[Site "Lugano"]
[Date "1968.11.02"]
[Round "7"]
[White "Wyss, Roberto"]
[Black "Yabra, Frederico"]
[Result "0-1"]

1. f4 e5 2. fxe5 Nc6 3. Nf3 d6 4. exd6 Bxd6 5. d4 Bg4 6. Bg5 f6 7. Bh4 Bxf3 8. gxf3 Nxd4 9. e4 Qd7 10. Bf2 Nc6 11. h4 Nge7 12. Nd2 O-O-O 13. Be2 Rhe8 14. c3 f5 15. Qc2 Bf4 16. Nf1 Kb8 17. Be3 Bxe3 18. Nxe3 Qd6 19. Nf1 fxe4 20. Rd1 Qf4 21. Rxd8+ Rxd8 22. fxe4 Ng6 23. Bc4 Nxh4 24. Bd5 Nf3+ 25. Ke2 Ncd4+ 0-1