[Event "IBM"]
[Site "Amsterdam"]
[Date "1968.??.??"]
[Round "7"]
[White "Langeweg, Kick"]
[Black "Zuidema, Coen"]
[Result "1-0"]

1. Nf3 Nf6 2. c4 e6 3. b3 d5 4. Bb2 Be7 5. g3 O-O 6. Bg2 c5 7. O-O Nc6 8. e3 b6 9. Nc3 Ba6 10. Nb5 Rc8 11. Qe2 Bb7 12. d3 a6 13. Nc3 Rc7 14. Rfd1 Re8 15. cxd5 exd5 16. d4 Qa8 17. Na4 Qa7 18. Rac1 Nd8 19. dxc5 bxc5 20. Be5 Rc8 21. Nh4 Ne6 22. Nf5 Ne4 23. Bxe4 dxe4 24. Qg4 h5 25. Qxh5 Bc6 26. Qg4 f6 27. Bd6 1-0