[Event "Leningrad"] [Site "?"] [Date "1931.??.??"] [Round "?"] [White "Yurgis, A.."] [Black "Botvinnik, Mikhail"] [Result "0-1"] [ECO "A34"] [Annotator "Pedro Cañizares"] [PlyCount "74"] [EventDate "1968.??.??"] [EventRounds "11"] {[%evp 0,74,19,29,23,-13,19,19,41,21,16,40,45,43,43,59,53,32,10,10,11,11,17,2, 32,2,3,-1,9,8,25,0,3,-9,-9,-41,-11,-11,-5,-20,-20,-65,-60,-46,22,-38,-31,-25, 22,0,0,0,18,37,55,-18,-19,-31,-31,-134,12,-56,-55,-55,-55,-76,53,55,125,-173, -151,-482,-484,-492,-492,-492,-509]} 1. Nf3 Nf6 2. c4 c5 3. Nc3 b6 4. g3 Bb7 5. Bg2 d5 6. cxd5 Nxd5 7. O-O e6 8. b3 Be7 9. Bb2 O-O 10. Nxd5 Bxd5 11. d3 Nd7 ( 11... Bf6 12. Rb1 Na6 13. a3 Bxb2 14. Rxb2 Qf6 15. Qb1 Rac8 16. Nd2 Rfd8 17. b4 cxb4 18. axb4 Qc3 {1/2-1/2 (29) Dragomarezkij,E (2447)-Balashov,Y (2409)/ Moscow 2009/EXT 2010 (29)}) 12. Qc2 Rc8 $146 (12... Bf6 13. Rac1 Rc8 14. Rfd1 Bxb2 15. Qxb2 Nf6 16. Rc2 Qe7 17. Rdc1 Qb7 18. Rc3 h6 19. Qc2 Rcd8 20. e4 Bc6 { Wolfsteiner,H (2266)-Pruefer,S (2193)/Bayern 2003/EXT 2004/1-0 (42)}) 13. Rae1 b5 14. e4 Bb7 15. Nd2 Nb8 16. f4 Nc6 17. a3 Qd7 18. Nf3 Rfd8 19. Rd1 Ba6 20. Ba1 b4 21. a4 Nd4 22. Qb2 Bf6 23. e5 Be7 24. Nxd4 cxd4 25. Qe2 Rc5 26. Bb2 f5 27. h4 Rc3 28. Bxc3 dxc3 29. Qe3 Bxd3 30. Rf2 Qd4 31. Qxd4 Rxd4 32. Bf1 c2 33. Rc1 Bxf1 34. Rcxf1 Rc4 35. bxc4 Bc5 36. Kg2 Bxf2 37. Kxf2 b3 0-1