[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.10"]
[Round "14"]
[White "Petersen, Hans"]
[Black "Ciezkowsky, Joseph"]
[Result "1/2-1/2"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. c3 Nc6 5. e5 cxd4 6. cxd4 Nge7 7. Ngf3 Qb6 8. Nb3 Ng6 9. Be2 Be7 10. O-O O-O 11. Bd3 Bd7 12. Be3 Rac8 13. Rc1 Qd8 14. h3 Nh8 15. Nh2 f6 16. exf6 Bxf6 17. Ng4 Nf7 18. f4 Nd6 19. Ne5 Bxe5 20. fxe5 Nf5 21. Bxf5 exf5 22. Nc5 b6 23. Nb7 Qe7 24. Nd6 Rb8 25. Qh5 Qe6 26. Qh4 a6 27. Rf2 h6 28. g3 Ne7 29. Rcf1 Be8 30. Qf4 Bg6 31. Rc1 Nc8 32. Nxc8 Rbxc8 33. Rxc8 Qxc8 34. Qf3 Qe6 35. Kh2 Kh7 36. Qe2 b5 37. Qd2 Be8 38. Qc2 Bg6 1/2-1/2