[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.10.25"]
[Round "1"]
[White "Lein, Anatoly"]
[Black "Franco Ocampos, Zenon"]
[Result "1/2-1/2"]
[WhiteElo "2505"]
[BlackElo "2315"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 Qb6 4. Nc3 e6 5. O-O Nge7 6. Re1 Nd4 7. Bf1 Nec6 8. d3 Be7 9. Nxd4 cxd4 10. Ne2 O-O 11. Ng3 d6 12. c4 a5 13. f4 Bd7 14. Re2 f5 15. exf5 exf5 16. b3 Rfe8 17. a3 g6 18. Rb1 Bf6 19. Rxe8+ Bxe8 20. Be2 d5 21. Bd2 Bf7 22. Bf3 Rd8 23. Qc2 Be7 24. cxd5 Bxd5 25. Bxd5+ Rxd5 26. Qc4 Qb5 27. b4 axb4 28. axb4 Qxc4 29. dxc4 Rd7 30. Kf1 d3 31. Ke1 Nd4 32. Nf1 Nc2+ 33. Kd1 Na3 34. Rc1 Rd4 35. c5 Nc4 36. Rb1 Kf7 37. Ne3 Rxf4 38. Nxc4 Rxc4 39. Rb3 Rd4 40. Be3 Re4 41. Bd2 Rd4 42. Be3 Re4 43. Bd2 Rd4 44. Be3 1/2-1/2