[Event "IBM"]
[Site "Amsterdam"]
[Date "1965.??.??"]
[Round "1"]
[White "Langeweg, Kick"]
[Black "Donner, Jan Hein"]
[Result "0-1"]

1. d4 d5 2. c4 c6 3. Nc3 e5 4. cxd5 cxd5 5. e4 dxe4 6. Bb5+ Bd7 7. dxe5 Bb4 8. Bd2 Bxc3 9. Bxd7+ Qxd7 10. Bxc3 Ne7 11. Ne2 Nd5 12. O-O Nc6 13. Qa4 e3 14. f4 O-O 15. Rad1 Rad8 16. Qb3 Qg4 17. Rxd5 Qxe2 18. Rxd8 Nxd8 19. a3 Ne6 20. Qxb7 Rd8 21. g3 Qc2 22. Qg2 e2 23. Re1 Rd1 24. Qa8+ Rd8 25. Qf3 Rd1 26. Qa8+ Rd8 27. Qxa7 Qe4 28. Qf2 Rd1 29. h4 h5 30. Kh2 Rxe1 31. Qxe1 Nc5 32. Qh1 Qc2 33. Qg2 Ne4 34. Be1 Qd3 35. a4 Nd2 36. Qf2 Nf3+ 37. Kg2 Nd4 38. a5 Qe4+ 39. Kh2 Nf3+ 40. Kh3 Nxe1 0-1