[Event "IBM"]
[Site "Amsterdam"]
[Date "1973.??.??"]
[Round "10"]
[White "Donner, Jan Hein"]
[Black "Enklaar, Bert F"]
[Result "1-0"]

1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 g6 5. e4 Bg7 6. Be2 O-O 7. Nf3 e6 8. O-O Re8 9. dxe6 Bxe6 10. Bf4 Nc6 11. Bxd6 Nd4 12. e5 Nd7 13. Re1 Nc6 14. Qb3 Ndxe5 15. Bxc5 Na5 16. Qb4 b6 17. Be3 Nexc4 18. Bg5 Qc7 19. Nb5 Qb7 20. Nfd4 Bd5 21. b3 Bf8 22. Qc3 Ne5 23. Qg3 Nac6 24. Nxc6 Bxc6 25. Bf1 Qb8 26. Bf4 f6 27. Nd4 Bd7 28. Bc4+ Kh8 29. Bd5 Bd6 30. Bxa8 Qxa8 31. Nf3 Nxf3+ 32. gxf3 Bxf4 33. Qxf4 Bf5 34. Rac1 Rd8 35. Qc7 Rc8 36. Qe7 1-0