[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.10.25"]
[Round "1"]
[White "Gonzalez Acosta, Bernal Manuel"]
[Black "Hernandez Onna, Roman"]
[Result "1/2-1/2"]
[BlackElo "2465"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 O-O 8. Be2 b6 9. O-O Bb7 10. f3 Nh5 11. Rc1 Nf4 12. Nxc6 Nxe2+ 13. Nxe2 dxc6 14. Qb3 Qc7 15. Rfd1 Rad8 16. c5 b5 17. Bf4 e5 18. Bg5 Rxd1+ 19. Rxd1 h6 20. Bh4 Re8 21. Qd3 Bf8 22. b4 Bc8 23. Bf6 Be6 24. Qd2 Qb8 25. Qb2 Bc4 26. Nc1 a5 27. a3 axb4 28. axb4 Re6 29. Bd8 Re8 30. Bb6 f5 31. Nb3 fxe4 32. fxe4 Qc8 33. Na5 Bf7 34. h3 g5 35. Qf2 Bg6 36. Qf3 Be7 37. Rf1 Qe6 38. Qd3 Rf8 39. Rxf8+ Bxf8 40. Bc7 g4 41. Bd6 Qd7 42. hxg4 Kh7 43. Kh2 Be7 44. Qc3 Bg5 45. Qf3 Qe8 46. g3 Bd2 47. Qf6 Bg5 48. Qf3 Bd2 49. Qf6 Bg5 50. Qf3 1/2-1/2