[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1968.01.25"]
[Round "13"]
[White "Donner, Jan Hein"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 h6 7. Bf4 Nc6 8. d5 e5 9. Be3 Nd4 10. Bxd4 exd4 11. Qxd4 Re8 12. Qd3 Qe7 13. f3 a6 14. Qd2 c6 15. Bd3 cxd5 16. cxd5 Nd7 17. Nge2 Qh4+ 18. g3 Qe7 19. O-O h5 20. h3 Ne5 21. Kg2 b5 22. b4 Bd7 23. Rac1 Rac8 24. a3 f5 25. Nd4 Nxd3 26. Qxd3 Qe5 27. Nc6 Bxc6 28. dxc6 Rxc6 29. Qd5+ Qxd5 30. Nxd5 Rxc1 31. Rxc1 fxe4 32. fxe4 Rxe4 33. Rc6 Re2+ 34. Kf3 1/2-1/2