[Event "URS-ch39 Final"]
[Site "Leningrad"]
[Date "1971.10.01"]
[Round "11"]
[White "Krogius, Nikolai V"]
[Black "Lein, Anatoly"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. Nc3 O-O 5. e4 d6 6. Be2 e5 7. O-O Nc6 8. Be3 Ng4 9. Bg5 f6 10. Bh4 Nh6 11. d5 Ne7 12. Rc1 Nf7 13. b4 a5 14. a3 axb4 15. axb4 h5 16. Bg3 f5 17. exf5 Nxf5 18. h3 Nxg3 19. fxg3 Nh6 20. Nd2 Nf5 21. Nde4 Bh6 22. Ra1 Be3+ 23. Kh2 Rxa1 24. Qxa1 Nh6 25. Qe1 Rxf1 26. Bxf1 Nf5 27. Bd3 Bh6 28. Kh1 Kg7 29. Nd1 Nd4 30. Ndf2 Bf5 31. g4 hxg4 32. Nxg4 Bxg4 33. hxg4 Bf4 34. g3 Bg5 35. Kg2 Be7 36. Nc3 Qh8 37. Ne2 Nxe2 38. Qxe2 Qh6 39. Qe1 Bf6 40. b5 b6 41. Bc2 Kf7 42. Bd3 Qg5 43. Kf3 1/2-1/2