[Event "IBM"]
[Site "Amsterdam"]
[Date "1961.??.??"]
[Round "6"]
[White "Langeweg, Kick"]
[Black "Johner, Hans"]
[Result "1-0"]

1. c4 e5 2. Nc3 g6 3. g3 Bg7 4. Bg2 d6 5. d3 Nc6 6. Nf3 Nge7 7. O-O O-O 8. Ne1 Be6 9. Nd5 Qd7 10. Rb1 Nd8 11. b4 c6 12. Nxe7+ Qxe7 13. b5 c5 14. Nc2 Qd7 15. Re1 d5 16. Ne3 d4 17. Nd5 Bxd5 18. Bxd5 Ne6 19. a4 Rab8 20. a5 a6 21. Ba3 Nc7 22. Bg2 Qd6 23. Qb3 axb5 24. cxb5 Rfc8 25. Rec1 Ne6 26. b6 Bf8 27. Bxb7 Rxb7 28. a6 Rbb8 29. b7 Qxa6 30. bxc8=Q Rxc8 31. Ra1 Qc6 32. Rcb1 Qd7 33. Bc1 Kg7 34. Qb7 Rc7 35. Qe4 Bd6 36. Ra6 Ra7 37. Rxa7 Qxa7 38. Qd5 Qe7 39. Rb7 Nc7 40. Qc6 Qd8 41. Bd2 Ne8 42. h4 h6 43. Rd7 Qb8 44. Qd5 1-0