[Event "World-ch25 Petrosian-Spassky +4-3=17"]
[Site "Moscow"]
[Date "1966.04.11"]
[Round "1"]
[White "Spassky, Boris Vasilievich"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. Bd3 Bxd3 9. Qxd3 Qc7 10. Bd2 e6 11. O-O-O O-O-O 12. c4 Ngf6 13. Kb1 c5 14. Bc3 cxd4 15. Nxd4 a6 16. Nf3 Bc5 17. Qe2 Bd6 18. Ne4 Be7 19. Nxf6 Bxf6 20. Bxf6 Nxf6 21. Ne5 Rxd1+ 22. Rxd1 Rd8 23. Rxd8+ Kxd8 24. Qd3+ Ke7 25. Qd4 h5 26. a3 Nd7 27. Nxd7 Qxd7 28. Qc5+ Qd6 29. Qg5+ Ke8 30. Qe3 Qc6 31. Qg3 g6 32. b3 Qe4+ 33. Kb2 e5 34. Qe3 Qxg2 35. Qxe5+ Kf8 36. Qh8+ Ke7 37. Qe5+ 1/2-1/2