[Event "IBM"]
[Site "Amsterdam"]
[Date "1968.??.??"]
[Round "6"]
[White "Kuijpers, Frans"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. Rd1 O-O 11. c4 bxc4 12. Bxc4 Bc5 13. Be3 Bxe3 14. Qxe3 Qb8 15. Bb3 Na5 16. Nbd2 Qa7 17. Qxa7 Rxa7 18. Nd4 Nxd2 19. Rxd2 c5 20. Ne2 Nxb3 21. axb3 d4 22. b4 d3 23. Nf4 c4 24. Rc1 Rc7 25. b3 Rfc8 1/2-1/2