[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.10.25"]
[Round "1"]
[White "Mateo, Ramon"]
[Black "Nunn, John DM"]
[Result "0-1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Qd7 6. Qa4 a6 7. Bxc6 bxc6 8. c4 e6 9. O-O Ne7 10. Nc3 Ng6 11. Rd1 Be7 12. Qa5 O-O 13. Qh5 f6 14. Rd3 Qe8 15. b3 e5 16. Ba3 d5 17. Bxe7 Qxe7 18. g3 dxc4 19. bxc4 Be6 20. Nd2 Rad8 21. Qe2 Rxd3 22. Qxd3 Rd8 23. Qe3 Nf8 24. Rb1 Bf7 25. Rb6 Qd7 26. Nb3 Bxc4 27. Nc5 Qh3 28. Qe1 Ne6 29. Nxe6 Qxe6 30. Nd5 Bxd5 31. exd5 Qxd5 32. Qb1 c5 33. Rb8 c4 34. Qb4 Rxb8 35. Qxb8+ Kf7 36. Qa7+ Kg6 37. Qxa6 c3 38. Qe2 e4 39. a4 h5 0-1