[Event "St Petersburg International Final"]
[Site "St Petersburg"]
[Date "1914.05.19"]
[Round "8"]
[White "Alekhine, Alexander"]
[Black "Marshall, Frank James"]
[Result "1/2-1/2"]
[ECO "C49"]
[Annotator "Tactical Analysis 4.1 (180s)"]
[PlyCount "90"]
[EventDate "1914.05.10"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "RUS"]
[SourceTitle "Tarrasch"]
[Source "ChessBase"]
[SourceDate "2018.10.02"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.02"]
[SourceQuality "1"]
{Analizada con Fat Fritz 2.0.} 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O
O-O 6. d3 d6 7. Bg5 Bg4 8. Nd5 (8. Bxf6 $142 gxf6 9. Bxc6 bxc6 10. h3) 8... Nd4
$16 {C49: Four Knights: 4 Bb5 Bb4.} 9. Kh1 $146 ({Predecessor:} 9. c3 Nxb5 10.
Nxb4 c6 11. Nc2 Nc7 12. Ne3 Bh5 13. g4 Bg6 14. Nh4 Ne6 15. Bxf6 Qxf6 16. Nhf5
Rad8 17. Qf3 Nf4 18. Rad1 d5 19. Ng2 Bxf5 20. exf5 Nxg2 21. Kxg2 g6 22. fxg6
Qxf3+ 23. Kxf3 fxg6+ 24. Ke3 Rf4 25. f3 Rdf8 26. Rf2 Kg7 27. d4 e4 28. Rdf1
exf3 29. Rxf3 Re4+ 30. Kd3 Rxf3+ 31. Rxf3 Rxg4 32. Rf2 Rh4 33. b4 {0-1 (33)
Lindstrom,A-Tarrasch,S Skivarp 1911}) 9... c6 10. Nxf6+ gxf6 {White has an
edge.} 11. Bh4 {[#]} (11. Bh6 $14 {was forced to keep a grip.}) 11... Nxb5 $2 (
11... d5 $1 $19 {[%CAl Rd5e4] ...dxe4 is the strong threat.} 12. c3 dxe4 13.
cxd4 exf3 14. gxf3 Bh5) 12. c3 $11 Ba5 13. a4 Nc7 14. b4 $1 Bxb4 15. cxb4 Kg7 (
{Black should play} 15... Ne6 $1 $11) 16. Qd2 ({White should try} 16. h3 $14
Bh5 17. d4) 16... Ne6 (16... Bxf3 $11 {keeps the balance.} 17. gxf3 h6) 17. Ng1
$1 $16 Rg8 $2 (17... h6 $16) 18. f4 exf4 ({Much weaker is} 18... Nxf4 $6 19. g3
$16) 19. d4 d5 (19... Ng5 {might work better.}) 20. Rxf4 $18 Nxf4 21. Qxf4 Be6
22. Rf1 Kf8 {Strongly threatening ...Rg6.} 23. Bxf6 Qb8 {aiming for ...Qxf4.}
24. Qh6+ Ke8 25. exd5 cxd5 26. Nf3 $2 (26. Qxh7 $18 {is the precise move to
win.} Rg6 27. Be5) 26... Rg6 $16 27. Qh4 {Threatens to win with Ne5.} Qd6 (
27... Qc8 $14) 28. Ne5 $1 $18 Qf8 {[#]} 29. Nxg6 (29. b5 $18 Rc8 (29... Rh6 30.
Qg3 Rc8 31. Bg5 $18) 30. Qf4 Qg8 31. Bh4 Qg7 (31... Rxg2 $4 32. Qf6 $18) 32.
Nxg6 hxg6 $18 {Pero cuesta pensar que la tortura evidente a la que las negras
quedan sometidas (peor rey) sea suficiente para lograr la victoria para las
piezas blancas. Veamos un ejemplo de un enfrentamiento entre dos módulos
informáticos actuales al nivel de 40 jugadas en 1 hora sin finish:} 33. h3 Qf8
34. a5 Kd7 35. a6 b6 36. Bg3 Qd8 37. Kh2 Ke8 38. Qe5 Qe7 39. Rf4 Kd7 40. Rf6
Rc1 41. Rf2 Rc8 42. Rf4 Ke8 43. Rf2 Kd7 44. Rf4 Ke8 45. Bh4 Qf8 46. Rf6 Qe7 47.
Rf4 Qc7 48. Qf6 Qd6 49. Bg5 Kd7 50. Kg1 Rc1+ 51. Rf1 Rc8 52. Rf4 Rc1+ 53. Rf1
Rxf1+ 54. Kxf1 Qf8 55. Kg1 Qe8 56. Kh2 Qb8+ 57. Bf4 Qd8 58. Qg7 Qc8 59. Qf6 Qd8
60. Qg7 Ke8 61. Qe5 Kd7 62. Qd6+ Ke8 63. Qc6+ Qd7 64. Qb7 f6 65. Bc7 Qxb5 66.
Bxb6 Bd7 67. Bxa7 Bc6 68. Qc8+ Kf7 69. Qc7+ Ke6 70. Bb6 Kf5 71. h4 g5 72. h5
Bd7 73. a7 Qc6 74. Qb8 Qc3 75. a8=Q {1-0 (83) Fat Fritz 2-Dragon by Komodo
Chess 2,6 Tenerife 2021}) 29... hxg6 $11 30. Qe1 Rc8 31. h3 Rc4 32. Qe5 {
Hoping for Qb8+.} Qxb4 33. Qb8+ Rc8 34. Qxa7 Bf5 35. Kh2 Kd7 36. Rf2 Ke6 37.
Bg5 f6 38. Bd2 Qb3 39. Qa5 Be4 40. Bb4 Qc4 41. Bc5 Qb3 42. Bb4 Qc4 43. Bc5 {
[#] Threatening mate with Qb6+.} Qb3 (43... Qa6 $11 {remains equal.} 44. Qxa6+
bxa6) 44. Bb4 {White threatens Qb6+ and mate.} Qc4 ({Of course not} 44... Qe3
45. Qb6+ Rc6 46. Qxb7 $16) 45. Bc5 {Intending Qb6+ and mate.} Qb3 {Weighted
Error Value: White=0.29/Black=0.36} 1/2-1/2
