[Event "World-ch25 Petrosian-Spassky +4-3=17"]
[Site "Moscow"]
[Date "1966.05.23"]
[Round "18"]
[White "Petrosian, Tigran V"]
[Black "Spassky, Boris Vasilievich"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. a3 Bxf3 6. gxf3 Be7 7. f4 d5 8. f5 exf5 9. Bg2 O-O 10. cxd5 Bd6 11. Qd3 g6 12. Bg5 Re8 13. h4 Nbd7 14. h5 Rb8 15. hxg6 fxg6 16. O-O-O b5 17. Nxb5 Qc8 18. Rd2 Qb7 19. Nc3 Qb3 20. Qc2 Kg7 21. Bf3 h5 22. Qxb3 Rxb3 23. Rc2 Reb8 24. e3 Kf7 25. Rd1 Nb6 26. Bxf6 Kxf6 27. Be2 h4 28. f4 Re8 29. Kd2 Rxc3 30. Rxc3 Nxd5 31. Bb5 Nxc3 32. Bxe8 Nxd1 33. Kxd1 1/2-1/2