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

1. c4 e6 2. Nf3 Nf6 3. b3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. Bb2 O-O 8. Nc3 d5 9. e3 Nc6 10. d3 Rc8 11. Qe2 Rc7 12. Rfd1 Rd7 13. cxd5 Nxd5 14. Nxd5 Rxd5 15. d4 Rd7 16. dxc5 Bxc5 17. Ne5 Nxe5 18. Bxb7 Nd3 19. Bc3 Rxb7 20. Rxd3 Qc8 21. b4 Be7 22. Qg4 e5 23. Qe4 f6 1/2-1/2