[Event "Olympiad-18 Preliminaries B"]
[Site "Lugano"]
[Date "1968.10.23"]
[Round "6"]
[White "Byrne, Robert Eugene"]
[Black "Villarroel, Geber"]
[Result "1-0"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 O-O 5. e3 d5 6. Bd3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 Qc7 10. cxd5 exd5 11. Nh4 Re8 12. f3 Na5 13. g4 g6 14. Ng2 Bd7 15. Bd2 Bc6 16. Be1 cxd4 17. cxd4 b5 18. Bh4 Nd7 19. Qc2 Nc4 20. e4 Qb6 21. Qf2 Qa5 22. Nf4 Bb7 23. e5 a6 24. Rfd1 Rac8 25. Bg5 Qb6 26. Re1 Nf8 27. Kg2 Na5 28. Rad1 Rc3 29. Qh4 Ne6 30. Nxe6 Rxe6 31. Bf6 Rc8 32. f4 Qxd4 33. f5 Qb2+ 34. Re2 d4+ 35. Kf2 Qb3 36. Qh6 1-0