[Event "IBM"]
[Site "Amsterdam"]
[Date "1971.07.17"]
[Round "5"]
[White "Langeweg, Kick"]
[Black "Evans, Larry Melvyn"]
[Result "1/2-1/2"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 d6 5. e4 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Nd3 f5 11. Bd2 Nf6 12. f3 f4 13. c5 g5 14. Rc1 h5 15. Nb5 Ne8 16. Qc2 Bd7 17. Qb3 Kh8 18. Nf2 b6 19. cxb6 cxb6 20. a4 Rf6 21. Rc2 Rg6 22. Rfc1 Ng8 23. h3 Nh6 24. Nc7 Rc8 25. Nxe8 Rxc2 26. Rxc2 Bxe8 27. Bb5 Bxb5 28. axb5 Bf8 29. Qc3 Kg8 30. Qc8 Qxc8 31. Rxc8 Rg7 32. Bb4 Rd7 33. Nd3 Nf7 34. Bc3 g4 35. hxg4 hxg4 36. fxg4 Ng5 37. Nf2 Kf7 38. Kf1 a6 39. Rc6 axb5 40. Rxb6 Ra7 41. Rxb5 Ra1+ 1/2-1/2