[Event "St Petersburg International Preliminary"] [Site "St Petersburg"] [Date "1914.04.22"] [Round "2"] [White "Lasker, Emanuel"] [Black "Nimzowitsch, Aron"] [Result "1/2-1/2"] [ECO "B16"] [Annotator "Tactical Analysis 4.1 (180s)"] [PlyCount "83"] [EventDate "1914.04.21"] [EventType "tourn"] [EventRounds "11"] [EventCountry "RUS"] [SourceTitle "Lasker"] [Source "ChessBase"] [SourceDate "2002.01.23"] [SourceVersion "1"] [SourceVersionDate "2002.01.23"] [SourceQuality "1"] {[%evp 11,83,70,116,37,67,68,67,50,87,85,75,91,113,71,108,35,56,0,73,0,0,0,0, -164,-187,-180,-195,-173,-37,-138,-71,-87,-83,-101,-111,-100,-100,-125,-113, -139,-143,-185,-172,-164,-175,-195,-132,-190,-151,-176,-132,-171,-137,-210, -211,-221,-225,-231,-198,-216,-206,-205,-212,-190,-100,-107,0,0,0,0,0,0,0,0]} { Análisis de Fat Fritz 2.0.} 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Be2 $146 ({Predecessor:} 6. Nf3 Nd7 7. Be3 Nb6 8. Qd2 Be6 9. b3 Nd5 10. c4 Nxe3 11. fxe3 Bh6 12. Bd3 Qd7 13. Qf2 Qc7 14. O-O {1-0 (32) Yates,F-Hamond, F Cheltenham/ Gloucestershire 1913}) 6... Bf5 (6... e5 $14) 7. Bf3 {B16: Caro-Kann: Bronstein-Larsen Variation.} (7. Nf3 $16) 7... Qa5+ 8. c3 $1 h5 9. Bxh5 {Threatens to win with Qb3.White is slightly better.} Nd7 10. Bg4 Bxg4 11. Qxg4 O-O-O 12. Ne2 (12. h4 $142) 12... e6 13. Bf4 (13. Qf3 $16) 13... Qb5 14. O-O-O (14. O-O $14) 14... Nb6 (14... Qd5 $1 $11 {keeps the balance.}) 15. Ng3 ( 15. Kb1 $16 Rg8 16. Qf3 Ba3 17. b3 Qf5+ 18. Ka1 e5 $14) 15... Qd5 16. Kb1 Qxg2 17. Rdg1 $2 (17. h4 $11 {and White stays safe.}) 17... Qxf2 $19 18. Ne4 {[#]} Qh4 {And now ...Nd5 would win.} 19. Qf3 Nc4 (19... Nd5 $19 20. Bg3 Qh5 21. Qxh5 Rxh5) 20. Ka1 {[#]} (20. b3 $15 Nd6 21. Bxd6 Bxd6 22. Nxf6) 20... f5 (20... Be7 $142 $1 21. Rg7 f5) 21. Ng5 Bd6 $40 {[%mdl 128] Black goes for the king.} 22. Bc1 {Strongly threatening Qe2.} Rd7 ({Don't go for} 22... Bxh2 $2 23. Rg2 $18 ( 23. Nxf7 Qf6 $16)) 23. Rg2 Bc7 24. Rhg1 Nd6 ({Wrong is} 24... Bxh2 $2 25. Rh1 $18) 25. Qe2 Ne4 26. Nf3 (26. a3 $17 {might work better.}) 26... Qh3 27. a3 a6 28. Be3 Rhd8 (28... f6 $19 29. Rg6 e5) 29. Ka2 (29. Ng5 $17 Qh8 30. Rf1) 29... Rh8 30. Ka1 Rhd8 ({Better is} 30... f6 $19 31. Rg6 e5) 31. Ka2 Re8 32. Rg8 (32. Nd2 $17) 32... Rxg8 33. Rxg8+ Rd8 34. Rg7 Rd7 35. Rg8+ Rd8 36. Rg7 Rf8 37. c4 Nf6 (37... Qh8 $19 38. Rg2 Rg8) 38. Bg5 $17 Nh5 (38... Ne4 $17 {White must now prevent ...Qh8.} 39. Be7 Re8 40. Rxf7 Qg4 41. Bh4 Rg8 42. d5 exd5 43. cxd5 Re8 $17) 39. Rxf7 $1 $11 {[%mdl 64] Remove Defender, Decoy. The position is equal.} Rxf7 40. Qxe6+ {[%mdl 64] Double Attack} Rd7 41. Ne5 Bxe5 42. Qe8+ {Weighted Error Value: White=0.31/Black=0.32} 1/2-1/2