[Event "URS-ch25 Semifinal"]
[Site "Leningrad"]
[Date "1957.11.25"]
[Round "10"]
[White "Zilber, Israel"]
[Black "Krogius, Nikolai V"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. Be2 cxd4 8. Nxd4 Nc6 9. Be3 Bd7 10. O-O Rc8 11. Nxc6 Bxc6 12. Bf3 Nd7 13. Rc1 a6 14. Qb3 Qa5 15. Nd5 Rfe8 16. Rf2 Bxd5 17. exd5 Nc5 18. Bxc5 Qxc5 19. Kf1 Qd4 20. g3 b5 21. Rfc2 bxc4 22. Rxc4 Rxc4 23. Rxc4 Qxb2 24. Qxb2 Bxb2 25. Rc7 Bd4 26. Be2 Rb8 27. Bxa6 Rb2 28. Be2 Rxa2 29. Rxe7 Bc5 30. h4 Rd2 31. h5 1/2-1/2