[Event "IBM"]
[Site "Amsterdam"]
[Date "1967.??.??"]
[Round "1"]
[White "Langeweg, Kick"]
[Black "Zuidema, Coen"]
[Result "1-0"]

1. c4 Nf6 2. d4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 h6 7. Bxf6 Bxf6 8. Qd2 b6 9. cxd5 exd5 10. b4 Be6 11. Rc1 c6 12. Be2 Qd6 13. O-O Be7 14. b5 c5 15. Rfd1 Rd8 16. Ne5 Bf6 17. f4 a6 18. Bf3 axb5 19. Nxb5 Qe7 20. Qc2 Ra5 21. Nc3 Bxe5 22. dxe5 d4 23. exd4 cxd4 24. Ne2 Rxa2 25. Qb1 b5 26. Qxb5 Qa7 27. Kh1 Ra5 28. Qb1 Na6 29. h3 Ra3 30. f5 Bb3 31. Rd2 Nc7 32. Rd3 Ba2 33. Rxa3 Qxa3 34. Qb6 Rd7 35. Rxc7 Rxc7 36. Qxc7 d3 37. Nf4 Bb1 38. Qb8+ 1-0