[Event "IBM"]
[Site "Amsterdam"]
[Date "1967.??.??"]
[Round "5"]
[White "Donner, Jan Hein"]
[Black "Pachman, Ludek"]
[Result "1/2-1/2"]

1. d4 e6 2. c4 Bb4+ 3. Nc3 Nf6 4. e3 b6 5. Ne2 Ba6 6. Ng3 Bxc3+ 7. bxc3 d5 8. Qf3 O-O 9. cxd5 exd5 10. Bxa6 Nxa6 11. Qe2 Qc8 12. f3 Re8 13. O-O h5 14. Qd3 c5 15. Bd2 Nc7 16. e4 h4 17. Nf5 dxe4 18. fxe4 Nxe4 19. Rae1 Nxd2 20. Qxd2 Rxe1 21. Qxe1 Qe6 22. Qxh4 Nd5 23. c4 Ne3 24. Ne7+ Kf8 25. Nd5 Kg8 26. Ne7+ Kf8 1/2-1/2