[Event "IBM"]
[Site "Amsterdam"]
[Date "1971.07.16"]
[Round "4"]
[White "Browne, Walter Shawn"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 Qc7 6. g3 a6 7. Bg2 Nf6 8. O-O Be7 9. Re1 d6 10. Nxc6 bxc6 11. e5 dxe5 12. Rxe5 Bb7 13. Re1 c5 14. Bf4 Qc8 15. Bxb7 Qxb7 16. Na4 c4 17. Qe2 Rc8 18. Be5 O-O 19. Rad1 Rfd8 20. b3 Ne8 21. Rxd8 Bxd8 22. Nb2 cxb3 23. axb3 Bf6 24. Nc4 Bxe5 25. Qxe5 Qc7 26. Qxc7 Rxc7 27. Kf1 Kf8 28. Ke2 Ke7 29. Kd3 Rd7+ 30. Kc3 Rb7 31. Ra1 Nc7 32. Kb2 f6 33. Ne3 Rb5 34. c4 Rh5 35. h4 a5 36. Kc3 Rc5 37. Kd4 Kd6 38. Nd1 e5+ 39. Ke3 f5 40. Nc3 Ke6 41. f3 Kd6 42. h5 g6 43. hxg6 hxg6 44. g4 Kd7 45. Kd3 Kd6 46. Ra3 e4+ 47. fxe4 fxg4 48. Nd5 Ne6 49. Ra1 g3 50. Rg1 g2 51. Ke3 a4 52. bxa4 Rxc4 53. Rxg2 Rxa4 54. Rxg6 Ra3+ 55. Kd2 Ke5 56. Nc3 Rxc3 57. Kxc3 Nf4 58. Rg8 Kxe4 59. Re8+ 1/2-1/2