[Event "Olympiad-20 Preliminaries G"]
[Site "Skopje"]
[Date "1972.09.20"]
[Round "2"]
[White "Timman, Jan H"]
[Black "De Greif, Boris"]
[Result "1-0"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. f3 O-O 6. Be3 b6 7. Bd3 a6 8. Nge2 c5 9. e5 Nfd7 10. exd6 exd6 11. Be4 Ra7 12. O-O Nf6 13. Bg5 Bb7 14. Qd2 Nxe4 15. fxe4 f6 16. Bh4 Nc6 17. Rad1 Qe8 18. Nd5 Qxe4 19. Bxf6 Nxd4 20. Nec3 Qc2 21. Ne7+ Kh8 22. Qxc2 Nxc2 23. Rxd6 Bxf6 24. Rdxf6 Rxf6 25. Rxf6 Bxg2 26. Rf7 Bb7 27. Nc6 Bxc6 28. Rxa7 a5 29. Nd5 Bxd5 30. cxd5 Kg8 31. d6 Kf8 32. Ra8+ 1-0