[Event "IBM"]
[Site "Amsterdam"]
[Date "1975.??.??"]
[Round "5"]
[White "Jansa, Vlastimil"]
[Black "Hamann, Svend"]
[Result "1-0"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O Be6 9. f4 Qc7 10. a4 O-O 11. Kh1 Nbd7 12. Be3 Rfc8 13. a5 Bc4 14. Nd2 Bxe2 15. Qxe2 d5 16. Nxd5 Nxd5 17. exd5 Qxc2 18. fxe5 Nxe5 19. Bd4 Ng6 20. Qf3 Rf8 21. Bc3 Nh4 22. Qg3 Qg6 23. d6 Bd8 24. Rf4 Qxg3 25. hxg3 Ng6 26. Rb4 Rb8 27. Ne4 b5 28. axb6 Bxb6 29. Rxa6 Be3 30. Rxb8 Rxb8 31. Rc6 Nf8 32. b4 h5 33. Nc5 Kh7 34. Rc7 Kg6 35. Re7 Bg5 36. Rc7 Bf6 37. Bd2 Be5 38. Bf4 Bxf4 39. gxf4 Rxb4 40. Rc8 Rd4 41. Rxf8 Rxd6 42. Kh2 f6 43. Rg8 Rc6 44. Nd3 Rc7 45. Kg3 Kf5 46. Rd8 Rc3 47. Kf3 h4 48. Rd5+ Ke6 49. Rd8 Kf5 50. Rd7 Ke6 51. Rd4 Kf5 52. Ke3 Ra3 53. Rd7 g6 54. Rd6 g5 55. fxg5 fxg5 56. Rd5+ Kg4 57. Kf2 Ra2+ 58. Kg1 Ra4 59. Kh2 Kh5 60. Ne5 Re4 61. Nf3 Rg4 62. Rd8 Ra4 63. Rg8 Ra5 64. Kh3 Rc5 65. Rh8+ Kg6 66. Re8 Kf6 67. Rd8 Kf5 68. Nd4+ Ke4 69. Kg4 Ke3 70. Nf5+ Kf2 71. Rd2+ Ke1 72. Ra2 Rc3 1-0