[Event "IBM"]
[Site "Amsterdam"]
[Date "1962.08.14"]
[Round "1"]
[White "Langeweg, Kick"]
[Black "Heidenfeld, Wolfgang"]
[Result "0-1"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 Nxe5 5. Nc3 Bc5 6. Be2 d6 7. Nf3 Nbc6 8. O-O O-O 9. Kh1 Nxf3 10. Bxf3 Ne5 11. Be2 Qh4 12. g3 Qh3 13. Nd5 Ng4 14. Bxg4 Bxg4 15. f3 Be6 16. Nf4 Qh6 17. b4 Qf6 18. Rb1 Bd4 19. Qd3 Rad8 20. Rd1 Be5 21. Nd5 Bxd5 22. cxd5 Qe7 23. b5 Qd7 24. f4 Bf6 25. Ba3 Rfe8 26. Rbc1 Ra8 27. Rb1 h6 28. Rdc1 Bd8 29. Bb2 a6 30. a4 axb5 31. axb5 b6 32. Ra1 Rxa1 33. Rxa1 Bf6 34. Bxf6 gxf6 35. Kg2 Kg7 36. Ra7 Re7 37. f5 Qe8 38. Kf3 c5 39. Ra6 Rb7 40. Qc3 Qxb5 0-1