[Event "Olympiad-18 Preliminaries B"]
[Site "Lugano"]
[Date "1968.10.24"]
[Round "7"]
[White "Boutteville, Cesar"]
[Black "Villarroel, Geber"]
[Result "0-1"]

1. c4 Nf6 2. Nf3 g6 3. b3 Bg7 4. Bb2 O-O 5. g3 d6 6. d4 c5 7. d5 b5 8. Bg2 bxc4 9. bxc4 Nbd7 10. Nbd2 Rb8 11. Bc3 Nb6 12. Rb1 Bf5 13. Bxf6 Bxf6 14. e4 Bd7 15. O-O Qc8 16. Qc2 Qa6 17. Rfe1 Bg7 18. Bf1 Qa4 19. Nb3 Rfe8 20. Nfd2 e6 21. Bd3 e5 22. Nf1 Qa6 23. Ne3 Bh6 24. f3 Qc8 25. g4 Qd8 26. Ng2 Qf6 27. Qf2 Na4 28. Rf1 Nc3 29. Ra1 Rb4 30. Qc2 Na4 31. Rab1 Reb8 32. Be2 Qd8 33. h4 Bf8 34. f4 exf4 35. Rxf4 Bg7 36. Rbf1 Be8 37. g5 R8b7 38. R4f3 h6 39. Qd2 h5 40. Ne1 Nb2 41. Rf6 a5 42. Qf4 a4 43. Nd2 R4b6 44. a3 Qe7 45. Nef3 Bd7 46. Ne1 Bh3 47. Rf2 Qd7 48. Qg3 Bg4 49. Rxf7 Be5 50. Qg2 Qxf7 51. Rxf7 Rxf7 52. Bxg4 Bd4+ 53. Kh1 Rf2 54. Be6+ Kg7 55. Qh3 Rxd2 56. Bc8 Rf2 57. Qd7+ Rf7 58. Qd8 Nxc4 59. Nd3 Rb1+ 60. Kh2 Rb8 61. Kh1 Ne5 62. Nxe5 Rf1+ 63. Kg2 Rf2+ 0-1