[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1971.01.30"]
[Round "15"]
[White "Olafsson, Fridrik"]
[Black "Donner, Jan Hein"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. g3 O-O 6. Bg2 Nbd7 7. Qd3 dxc4 8. Qxc4 a6 9. Qd3 c5 10. O-O cxd4 11. Qxd4 Nc5 12. Bf4 Qxd4 13. Nxd4 Rd8 14. Rfd1 Bd7 15. Bc7 Rdc8 16. Bb6 a5 17. Rd2 a4 18. a3 Bd8 19. Bxd8 Rxd8 20. Rad1 Kf8 21. f4 Ke7 22. e4 Ne8 23. e5 Nc7 24. Kf2 Rab8 25. Ke3 Na8 26. Nc2 Nb6 27. Rd4 Bc6 28. Bf3 Bxf3 29. Kxf3 Rxd4 30. Rxd4 Rd8 31. Rb4 Nd5 32. Nxd5+ Rxd5 33. Ne3 Rd2 34. Rb5 b6 35. Rxb6 Kd7 36. Nc4 Rxh2 37. Rb5 Kc6 38. Rb8 f6 39. Rg8 Kb5 40. Nd6+ Kc6 41. Rc8+ Kd5 42. Rd8 Kc6 1/2-1/2