[Event "URS-ch25 Semifinal"]
[Site "Leningrad"]
[Date "1957.11.30"]
[Round "13"]
[White "Bykov, Vladimir"]
[Black "Krogius, Nikolai V"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Be2 Nc6 10. d5 Nce5 11. Qb3 Nxf3+ 12. gxf3 Bh5 13. Rg1 Kh8 14. O-O-O f5 15. Bd4 Bxd4 16. Rxd4 f4 17. Rdd1 a6 18. Qc4 h6 19. Qd4+ Kh7 20. Bd3 Rf7 21. e5 Qh8 22. Rde1 Qg7 23. Bc2 Kh8 24. h4 Rd8 25. Bxg6 Bxg6 26. h5 Nxe5 27. Qxe5 Qxe5 28. Rxe5 Bf5 29. Rge1 Rd7 30. b3 Kg7 31. Ne4 b6 32. Kb2 Kf8 1/2-1/2