[Event "IBM"]
[Site "Amsterdam"]
[Date "1961.??.??"]
[Round "2"]
[White "Langeweg, Kick"]
[Black "Enevoldsen, Jens"]
[Result "1-0"]

1. c4 Nf6 2. Nc3 d5 3. d4 e6 4. Nf3 c5 5. cxd5 exd5 6. Bg5 Nc6 7. e4 cxd4 8. Nxd5 Be7 9. Nxe7 Qxe7 10. Bd3 h6 11. Bxf6 Qxf6 12. Nd2 O-O 13. O-O Ne5 14. Qe2 Bd7 15. Rad1 Rfd8 16. Nb3 Qb6 17. Nc1 Rac8 18. Rfe1 Ba4 19. Rd2 Qa5 20. h3 Nf3+ 21. gxf3 Qg5+ 22. Kh2 Qf4+ 23. Kg2 Bd7 24. Nb3 Qg5+ 25. Kh2 Qf4+ 26. Kh1 Bxh3 27. Rg1 Qh4 28. Rg2 Bxg2+ 29. Kxg2 Qg5+ 30. Kf1 Qf4 31. e5 g6 32. e6 Re8 33. exf7+ Kxf7 34. Be4 Qh2 35. Qb5 Rc7 36. Qd5+ Kg7 37. Qxd4+ Qe5 38. Qxe5+ Rxe5 39. Ke2 Rce7 40. Ke3 g5 41. Rd6 g4 42. Rg6+ Kf7 43. Rxg4 1-0