[Event "IBM"]
[Site "Amsterdam"]
[Date "1961.??.??"]
[Round "3"]
[White "De Rooi, Paul"]
[Black "Donner, Jan Hein"]
[Result "0-1"]
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O d6 7. Kh1 Nbd7 8. f4 Qc7 9. f5 e5 10. Nf3 b5 11. Bg5 Bb7 12. Qe2 Be7 13. Nbd2 O-O 14. Rae1 Nc5 15. Qf2 h6 16. Qh4 Rfe8 17. Bxh6 gxh6 18. Qxh6 Nh7 19. g4 Bf8 20. Qh5 f6 21. g5 fxg5 22. Nxg5 Nf6 23. Qh4 Bg7 24. Re3 d5 25. Rh3 dxe4 26. Ndxe4 Rad8 27. Ne6 Rxe6 28. Rg1 Kf8 29. fxe6 0-1