[Event "World-ch25 Petrosian-Spassky +4-3=17"]
[Site "Moscow"]
[Date "1966.05.20"]
[Round "17"]
[White "Spassky, Boris Vasilievich"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 Nf6 6. d3 O-O 7. Nh4 Rb8 8. f4 d6 9. O-O Bd7 10. f5 b5 11. Bg5 b4 12. Nd5 a5 13. Kh1 Ne5 14. Qd2 Bc6 15. Rae1 a4 16. Qe2 Qd7 17. Bc1 Qb7 18. Ne3 e6 19. fxe6 fxe6 20. Nf3 Nxf3 21. Rxf3 d5 22. exd5 exd5 23. Ng4 Rbe8 24. Nxf6+ Bxf6 25. Re3 Rxe3 26. Qxe3 Re8 27. Qf2 Rxe1+ 28. Qxe1 Kf7 29. Qe2 Qe7 1/2-1/2