[Event "St Petersburg International Preliminary"]
[Site "St Petersburg"]
[Date "1914.05.01"]
[Round "7"]
[White "Lasker, Emanuel"]
[Black "Alekhine, Alexander"]
[Result "1/2-1/2"]
[ECO "B01"]
[Annotator "Tactical Analysis 4.1 (180s)"]
[PlyCount "48"]
[EventDate "1914.04.21"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "RUS"]
[SourceTitle "Tarrasch"]
[Source "ChessBase"]
[SourceDate "2018.10.02"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.02"]
[SourceQuality "1"]
{[%evp 11,48,40,39,-8,-3,-13,-10,-47,23,17,35,31,34,37,20,13,28,13,246,205,378,
81,66,65,66,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} {Analiza Fat Fritz 2.0.} 1. e4 d5 2.
exd5 Nf6 3. d4 Nxd5 4. Nf3 Bg4 5. c4 Nb6 $146 ({Predecessor:} 5... Nf6 6. Be3
e6 7. Qb3 b6 8. Ne5 c6 9. Nc3 Bd6 10. Bg5 Bf5 11. Be2 Qc7 12. Nf3 Nbd7 13. Bh4
O-O {0-1 (57) Janowski,D-Tinsley,S Hastings 1895}) 6. Nc3 e5 7. c5 {B01:
Scandinavian Defence.} ({Much weaker is} 7. dxe5 Qxd1+ 8. Kxd1 Nc6 $15) (7. d5
$14) 7... exd4 $11 8. Ne4 N6d7 {Hoping for ...Qe7.} 9. Qxd4 {White wants to
play Bb5.} Qe7 (9... Nc6 $15 10. Nd6+ cxd6 11. Qxg4 Nxc5) 10. Bb5 Nc6 11. Bxc6
bxc6 12. O-O {[#] Threatens to win with Bf4.} Bxf3 13. gxf3 {Strongly
threatening Bf4.} O-O-O $1 14. Qa4 {aiming for Bf4.} Ne5 $2 (14... Nxc5 $11 15.
Qxc6 Nxe4 16. fxe4 Qf6 17. Qa8+ Kd7 18. Qxa7 Qg6+ 19. Kh1 Qxe4+ 20. f3 Qh4 21.
Qg1 h6 22. Be3 Bd6 23. Bc5 Kc8 24. Bxd6 Rxd6 25. Qxg7 Re8 26. Qg2 h5 27. Rf2
Red8 28. Qg3 Qa4 29. Raf1 Kb8 30. Qg5 Rd5 31. Qf6 R8d7 32. b3 Qb5 33. Rg1 Rd1
34. Rfg2 Kb7 35. Qg5 Qxg5 36. Rxg5 R1d2 37. R5g2 h4 38. h3 f5 39. Rf1 R2d3 40.
Rg5 Rd2 41. Rg2 R2d3 42. Rc2 Rg7 43. Rc4 Rg3 44. Rxh4 Rd2 45. Rg1 Rxf3 46. Rg2
Rdd3 {con compensación por el material entregado.}) 15. Kg2 Qe6 $2 (15... Kb8
16. Re1 Nd3) 16. Qxa7 $2 (16. Bf4 $18 {is the precise move to win.} Kb7 17. Qa5
f6 18. b4 Be7 19. b5 Ka8 20. Rfb1 cxb5 21. Bxe5 fxe5 22. Rxb5 c6 23. Rb6 Rb8
24. Qa6 Qc8 25. Rxc6 Qxa6 26. Rxa6 Rhc8 27. Rc1 $18) 16... Qf5 $16 17. Qa8+ $1
({Avoid the trap} 17. Ng5 $2 h6 $19) 17... Kd7 18. Rd1+ (18. Qa3 $1 $14 Be7 19.
b4 Qg6+ 20. Ng3 Qd3 21. Qxd3+ Nxd3 22. Rb1 Kc8 23. Be3 h6 24. Ne2 Bf6 25. Rb3
Rhe8 26. Rfb1 Kb7 27. f4 g5 28. Kf1 gxf4 29. Nxf4 Ne5 30. Nh5 Bg5 31. Bxg5 hxg5
32. Re1 Rd2 {con compensación por el material entregado.}) 18... Ke6 $1 $11 {
The position is equal.} ({Don't go for} 18... Bd6 $2 19. Qa3 $18) 19. Qxd8 {
[#] White wants to mate with Qc8+.} Qxf3+ 20. Kg1 Be7 21. Qd4 Qg4+ 22. Kh1 Qf3+
$1 23. Kg1 Qg4+ 24. Kh1 (24. Kf1 Qh3+ 25. Ke2 Qg4+ 26. Kf1 $11 (26. Kd2 $2 Nf3+
$19)) 24... Qf3+ $1 {Weighted Error Value: White=0.44/Black=0.33} 1/2-1/2
