[Event "Olympiad-18 Preliminaries A"]
[Site "Lugano"]
[Date "1968.10.19"]
[Round "2"]
[White "Castro Aguilar, Morelos"]
[Black "Penrose, Jonathan"]
[Result "0-1"]

1. Nf3 g6 2. d4 Bg7 3. e4 d6 4. Bc4 Nf6 5. Qe2 c6 6. O-O O-O 7. e5 Nd5 8. Bb3 Bg4 9. c4 Nc7 10. Re1 dxe5 11. dxe5 Nd7 12. Bf4 Ne6 13. Bg3 Qa5 14. Nbd2 Rad8 15. h3 Nd4 16. Qe3 Nxf3+ 17. Nxf3 Bxf3 18. gxf3 Nc5 19. Bf4 Ne6 20. Bh6 Rd4 21. Bxg7 Kxg7 22. c5 Qxc5 23. Rac1 Qb6 24. Rcd1 Rfd8 25. Rxd4 Nxd4 26. Rd1 c5 27. e6 f6 28. h4 Qc6 29. Rd3 Nf5 30. Qd2 Nxh4 31. Qd1 Rxd3 32. Qxd3 Qxf3 33. Qd5 b6 34. Kf1 Qxd5 35. Bxd5 Nf5 36. a4 Nd4 37. b3 f5 38. f3 Kf6 39. Kf2 Nxe6 0-1