[Event "World Championship 26th"]
[Round "4"]
[Site "Moscow"]
[Date "1966.04.18"]
[White "Petrosian, Tigran V"]
[Black "Spassky, Boris V"]
[Result "1/2-1/2"]
[ECO "A13"]
[Opening "English Opening"]
 1. c4   e6
 2. g3   d5
 3. Bg2  Nf6
 4. Nf3  Be7
 5. O-O  O-O
 6. d4   c6
 7. b3   b6
 8. Bb2  Bb7
 9. Nc3  Nbd7
10. Qc2  Rc8
11. Rad1 b5
12. c5   b4
13. Na4  Ba6
14. Ne1  Bb5
15. Nd3  a5
16. a3   bxa3
17. Bxa3 Rb8
18. Rb1  Re8
19. Nc3  Ba6
20. Rfd1 Bf8
21. e4   dxe4
22. Nxe4 Bxd3
23. Qxd3 Nd5
24. Rdc1 N7f6
25. Nd6  Bxd6
26. cxd6 Qd7
27. Qa6  Rec8
28. Qxa5 Ne8
29. Qc5  Rb5
30. Qc4  Rbb8
31. Qc5  Rb5
32. Qc4  h6
33. Rc2  Rbb8
34. Rbc1 Nxd6
35. Bxd6 Qxd6
36. Bxd5 exd5
37. Qa4  Rb6
38. Rc5  Qe6
39. b4   Rcb8
40. Rxc6 Rxc6
41. Qxc6 Qxc6
42. Rxc6 Rxb4
43. Kf1  Rxd4
44. Ke2  
1/2-1/2