[Event "Candidates sf Petrosian-Kortschnoj+1-0"]
[Site "Moscow"]
[Date "1971.07.??"]
[Round "4"]
[White "Kortschnoj, Viktor Lvovich"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]

1. c4 Nf6 2. Nf3 e6 3. d4 Bb4+ 4. Bd2 Qe7 5. g3 Nc6 6. Nc3 Bxc3 7. Bxc3 Ne4 8. Rc1 O-O 9. Bg2 d6 10. d5 Nd8 11. dxe6 fxe6 12. O-O Bd7 13. Be1 Nf6 14. Nd4 e5 15. Nc2 Ne6 16. Ne3 Qf7 17. b4 Bc6 18. Nd5 Kh8 19. Bc3 Rae8 20. f4 exf4 21. gxf4 a5 22. a3 axb4 23. axb4 b5 24. Bxf6 gxf6 25. cxb5 Ba8 26. Rc3 Rg8 27. Rg3 Ng7 28. e4 Bxd5 29. Qxd5 Qxd5 30. exd5 Rb8 31. Rc1 Rxb5 32. Rc4 Nf5 33. Rxg8+ Kxg8 34. Kf2 Rb7 35. Bh3 Ne7 36. Be6+ Kg7 37. f5 Ra7 38. Ke3 Rb7 39. Kd3 Kf8 40. Kc3 Kg7 41. Rh4 Ra7 42. Kb3 Ra1 43. Rc4 Ra7 44. b5 Rb7 45. Ka4 Ra7+ 46. Kb4 Kh6 47. h3 Rb7 48. Rh4+ Kg5 49. Rg4+ Kh6 50. Kc4 Ra7 51. Rh4+ Kg7 52. Kb3 Ra1 53. Rc4 Rb1+ 54. Ka3 Ra1+ 55. Kb3 Rb1+ 56. Ka3 Ra1+ 57. Kb3 Rb1+ 58. Kc2 Rxb5 59. Rxc7 Kf8 60. Kd3 Rb3+ 61. Kd4 Rb4+ 62. Rc4 Rxc4+ 63. Kxc4 Kg7 64. Kb5 Kh6 65. Kb6 Kg5 66. Kc7 Nxd5+ 1/2-1/2