[Event "IBM"]
[Site "Amsterdam"]
[Date "1971.07.29"]
[Round "14"]
[White "Donner, Jan Hein"]
[Black "Timman, Jan H"]
[Result "1-0"]

1. Nf3 Nf6 2. c4 b6 3. d4 Bb7 4. e3 e6 5. Bd3 d5 6. Nc3 Bd6 7. O-O O-O 8. b3 Nbd7 9. Bb2 a6 10. Qe2 Ne4 11. Rad1 Qe7 12. Nb1 f5 13. Ne5 Bxe5 14. dxe5 Nec5 15. Bc2 dxc4 16. bxc4 b5 17. Ba3 Nxe5 18. Bb3 Nf3+ 19. gxf3 Qg5+ 20. Kh1 Qh5 21. e4 Rf6 22. Rg1 Nxe4 23. Rd3 Ng5 24. Nd2 Nh3 25. Rg3 Rh6 26. Rd7 Ng5 27. Rg2 Rg6 28. Bb2 Kh8 29. Bd1 bxc4 30. Rxc7 Bd5 31. Be5 h6 32. Rg3 Rd8 33. Kg2 Kh7 34. Qe3 Qh4 35. Be2 Rf8 36. Qf4 Qh5 37. Bxc4 Ba8 38. Bxa6 Rd8 39. Bb7 1-0