[Event "World-ch25 Petrosian-Spassky +4-3=17"]
[Site "Moscow"]
[Date "1966.05.18"]
[Round "16"]
[White "Petrosian, Tigran V"]
[Black "Spassky, Boris Vasilievich"]
[Result "1/2-1/2"]

1. d4 g6 2. e4 Bg7 3. Nf3 d6 4. Be2 e6 5. c3 Nd7 6. O-O Ne7 7. Nbd2 b6 8. a4 a6 9. Re1 Bb7 10. Bd3 O-O 11. Nc4 Qe8 12. Bd2 f6 13. Qe2 Kh8 14. Kh1 Qf7 15. Ng1 e5 16. dxe5 fxe5 17. f3 Nc5 18. Ne3 Qe8 19. Bc2 a5 20. Nh3 Bc8 21. Nf2 Be6 22. Qd1 Qf7 23. Ra3 Bd7 24. Nd3 Nxd3 25. Bxd3 Bh6 26. Bc4 Qg7 27. Re2 Ng8 28. Bxg8 Rxg8 29. Nd5 Bxd2 30. Rxd2 Be6 31. b4 Qf7 32. Qe2 Ra7 33. Ra1 Rf8 34. b5 Raa8 35. Qe3 Rab8 36. Rf1 Qg7 37. Qd3 Rf7 38. Kg1 Rbf8 39. Ne3 g5 40. Rdf2 h5 41. c4 Qg6 42. Nd5 Rg8 43. Qe3 Kh7 44. Qd2 Rgg7 45. Qe3 Kg8 46. Rd2 Kh7 47. Rdf2 Rf8 48. Qd2 Rgf7 49. Qe3 1/2-1/2