[Event "IBM"]
[Site "Amsterdam"]
[Date "1972.??.??"]
[Round "?"]
[White "Donner, Jan Hein"]
[Black "Polugaevsky, Lev"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nc6 9. a3 Ba5 10. Qd3 a6 11. Ne4 b5 12. Nxf6+ Qxf6 13. Qe4 Bb7 14. Bd3 g6 15. dxc5 Rfd8 16. Be2 b4 17. Qf4 Qe7 18. Ng5 bxa3 19. bxa3 Bc7 20. Qh4 h5 21. Rb1 Rab8 22. f4 Ba8 23. Rxb8 Nxb8 24. Qg3 Nd7 25. Bxh5 Nxc5 26. Bf3 Bxf3 27. Qxf3 Nd3 28. Qc6 Qc5 29. Qxc5 Nxc5 30. Bb2 Bb6 31. Bd4 Na4 32. Bxb6 Nxb6 33. Rb1 Rd6 34. Kf2 Kg7 35. Ke2 Rc6 36. Nf3 Nd5 37. Rb3 Rc2+ 38. Nd2 a5 39. g3 a4 40. Rd3 Nc3+ 41. Kf3 f5 1/2-1/2