[Event "URS-ch25 Semifinal"]
[Site "Sverdlovsk"]
[Date "1957.12.04"]
[Round "16"]
[White "Korchnoi, Viktor Lvovich"]
[Black "Simagin, Vladimir Pavlovich"]
[Result "1-0"]

1. c4 Nf6 2. Nc3 e6 3. e4 c5 4. e5 Ng8 5. d4 cxd4 6. Qxd4 Nc6 7. Qe4 f5 8. Qe2 a6 9. Bd2 Bc5 10. f4 Nh6 11. O-O-O Ng4 12. Na4 Bxg1 13. Rxg1 b5 14. h3 Nh2 15. Nc3 Nxf1 16. Qxf1 O-O 17. Be3 Qa5 18. cxb5 axb5 19. Qxb5 Qd8 20. Rd2 Qh4 21. Qe2 Rf7 22. Rgd1 g5 23. Qf3 gxf4 24. Bxf4 Ra5 25. Qe3 Qd8 26. g4 fxg4 27. Rg1 Rg7 28. Rxg4 Rxg4 29. hxg4 Nb4 30. Bg5 Qc7 31. Bf6 Nxa2+ 32. Kc2 Nb4+ 33. Kb1 d5 34. Qg5+ Kf8 35. Bd8 Ra1+ 36. Kxa1 Qa7+ 37. Kb1 Ba6 38. Be7+ 1-0