[Event "IBM"]
[Site "Amsterdam"]
[Date "1972.??.??"]
[Round "?"]
[White "Timman, Jan H"]
[Black "Hartoch, Robert G"]
[Result "1-0"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nge2 Nf6 5. g3 O-O 6. Bg2 e5 7. O-O Nc6 8. dxe5 dxe5 9. Qxd8 Nxd8 10. f4 exf4 11. gxf4 Ne6 12. f5 Nc5 13. e5 Ng4 14. h3 Nxe5 15. f6 Bxf6 16. Rxf6 Bf5 17. Nd4 Ncd7 18. Rxf5 gxf5 19. Bh6 Rfe8 20. Nd5 Rac8 21. Nxf5 Ng6 22. Bg5 Kf8 23. Bh6+ Kg8 24. h4 c6 25. h5 cxd5 26. hxg6 Rxc2 27. Nd6 Re6 28. gxf7+ Kh8 29. Bf4 Kg7 30. Bh3 Rg6+ 31. Kf1 Rf6 32. Ne8+ Kxf7 33. Nxf6 Nxf6 34. Be5 Ne4 35. Kg1 Nd2 36. Bg2 Ke6 37. Re1 Ne4 38. Bxe4 dxe4 39. Rxe4 Kd5 40. Re3 b5 41. Bf6 b4 42. Re5+ Kc6 43. Rh5 Rc1+ 44. Kg2 a6 45. Ra5 Kb6 46. Bd8+ Kb7 47. b3 Rc8 48. Be7 Re8 49. Bxb4 Re4 50. Bc3 1-0