[Event "IBM"]
[Site "Amsterdam"]
[Date "1971.07.21"]
[Round "8"]
[White "Bobotsov, Milko Georgiev"]
[Black "Timman, Jan H"]
[Result "0-1"]
1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. f3 O-O 6. Be3 a6 7. Bd3 c5 8. dxc5 dxc5 9. Bxc5 Nc6 10. Be3 Nd7 11. Rc1 Qa5 12. Ne2 Nc5 13. O-O Rd8 14. Nd5 e6 15. Bd2 Qxa2 16. Bb1 Qxb2 17. Rc2 Qb3 18. Nc1 Qxb1 19. Bg5 exd5 20. Bxd8 Nxd8 21. cxd5 Qb6 22. Kh1 Bd7 23. Qd2 Ba4 24. Ra2 Bb5 25. Re1 Rc8 26. e5 Nd7 27. f4 Rc4 28. Ne2 Nc5 29. Nd4 Nd3 30. Nxb5 Nxe1 31. Nd6 Qb1 32. Rb2 Nf3+ 0-1