[Event "URS-ch25 Semifinal"]
[Site "Leningrad"]
[Date "1957.11.28"]
[Round "12"]
[White "Zilber, Israel"]
[Black "Bykov, Vladimir"]
[Result "1/2-1/2"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d3 d6 6. e4 c5 7. Nbd2 Nc6 8. c3 Bd7 9. h3 b5 10. Re1 Rc8 11. d4 cxd4 12. Nxd4 Qb6 13. N2f3 Qb8 14. Qd3 a6 15. Nxc6 Bxc6 16. Nd4 Bd7 17. Be3 Rfd8 18. Rad1 Be8 19. Nc2 Bc6 20. Nb4 Bb7 21. Nd5 Re8 22. Bg5 Nxd5 23. exd5 Bf8 24. h4 Qa8 25. h5 e5 26. Bf6 Rc7 27. f4 exf4 28. gxf4 Rc4 29. Re4 Rcxe4 30. Bxe4 Bg7 31. Bxg7 Kxg7 32. h6+ Kxh6 33. Qd4 Qd8 34. Rd2 f6 35. Bf3 Kg7 36. Bg4 Bc8 37. Qa7+ Kg8 38. Rh2 Re7 39. Qb8 f5 40. Re2 Rxe2 41. Bxe2 Qe8 42. Kf2 Qd8 1/2-1/2