[Event "URS-ch39 Final"]
[Site "Leningrad"]
[Date "1971.09.19"]
[Round "4"]
[White "Shamkovich, Leonid Alexandrovic"]
[Black "Krogius, Nikolai V"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Nc6 7. Bg2 Bd7 8. Nde2 a6 9. b3 Be7 10. Bb2 O-O 11. O-O b5 12. Qd2 Qc7 13. Rac1 Rfd8 14. Nd1 d5 15. exd5 Nxd5 16. Ne3 Nf6 17. c4 Rac8 18. Qc2 Qb8 19. Nd4 Ne5 20. Qe2 bxc4 21. Nxc4 Nxc4 22. Rxc4 Rxc4 23. Qxc4 Bb5 24. Nxb5 axb5 25. Qe2 b4 26. Rc1 Rc8 27. Rc4 Rxc4 28. Qxc4 h6 29. Bd4 Qd8 30. Bf3 Bf8 31. Kg2 Qd6 32. Be3 Nd5 33. Bxd5 exd5 34. Qd4 h5 35. Bd2 g6 36. Bf4 Qe6 37. Qe5 Qxe5 38. Bxe5 f5 39. Kf3 Bc5 40. Ke2 Kf7 41. f3 Ke6 1/2-1/2