[Event "St Petersburg International Preliminary"] [Site "St Petersburg"] [Date "1914.05.05"] [Round "10"] [White "Tarrasch, Siegbert"] [Black "Alekhine, Alexander"] [Result "1/2-1/2"] [ECO "C01"] [Annotator "Tactical Analysis 4.1 (180s)"] [PlyCount "72"] [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 0,38,25,26,13,-23,29,-28,-33,-31,-34,-31,-23,0,8,-5,9,-8,-11,-13,-13, -28,-4,2,2,-8,7,5,2,5,7,23,49,-75,-65,-58,-62,-47,-46,-44,-31]} {Analiza Fat Fritz 2.0.} 1. d4 d5 2. c4 e5 {Contragambito Albin.} 3. e3 exd4 4. exd4 Nf6 5. Nc3 Be7 6. Nf3 {Que ha traspuesto a una variante del cambio de la Defensa Francesa.} O-O 7. Be2 {[#]} Be6 $146 {C01: French: Exchange Variation.} ({ Predecessor:} 7... dxc4 8. Bxc4 Bg4 9. O-O Nc6 10. Be3 Rb8 11. d5 Ne5 12. Be2 Bxf3 13. Bxf3 a6 14. Bd4 Bd6 15. Be2 c5 16. dxc6 Nxc6 17. Be3 Qc7 18. h3 Qe7 19. Nd5 Nxd5 20. Qxd5 Rfd8 21. Qh5 g6 22. Qg5 f6 23. Qh4 Qe5 24. g3 Qxb2 25. Bc4+ Kh8 26. Rab1 Qe5 27. Rfe1 Qf5 28. Bd3 g5 29. Qc4 Qxh3 30. Qe4 Re8 31. Qf3 Qh6 32. Kg2 Ne5 33. Qd5 Nxd3 34. Qxd3 Be5 35. Rh1 Qg7 36. Rbd1 Re7 37. Bc5 Rc7 38. Qf5 Kg8 39. Bb6 Re7 40. Bd8 Rf7 41. Rhe1 Qf8 42. Bb6 Qe8 43. Be3 Qc6+ 44. Kg1 Re8 45. Bxg5 fxg5 46. Qxg5+ Bg7 47. Rxe8+ Qxe8 48. Rd8 Qxd8 49. Qxd8+ Bf8 50. Qd5 Bg7 51. f4 Bh6 52. Kg2 Bf8 53. g4 h6 54. Kh3 Kg7 55. g5 hxg5 56. fxg5 Kg6 57. Qe6+ Kg7 58. Kg4 Re7 59. Qf6+ Kg8 60. g6 Re4+ 61. Kf5 Re7 62. a4 Rg7 63. a5 Re7 64. Qd4 Rg7 65. Qd5+ Kh8 66. Qd8 Kg8 67. Kf6 {1-0 (67) Marshall, F-Tarrasch,S Monte Carlo (2) 1902}) 8. Ng5 Bf5 9. O-O Nc6 10. Be3 Nb4 11. Rc1 dxc4 12. Bxc4 c6 13. Nf3 Nbd5 14. Ne5 Nxc3 15. bxc3 Bd6 {[#]} 16. Re1 (16. Bxf7+ Rxf7 17. Nxf7 Kxf7 18. Qb3+ Kg6 19. Qxb7 {con juego incierto, para Khalifman, pero los módulos informáticos de hoy apoyan la causa negra:} Rc8 $17 20. h3 Bc7 21. c4 Qd6 22. f4 Re8 23. Rc3 h6 24. Qxa7 Ne4 25. Rb3 Kh7 26. Rf3 Re7 27. Qa3 Qf6 28. d5 Nd6 29. Qc5 Re4 30. Qa7 Bd8 31. Rb8 Rxc4 32. Qa8 Be4 33. Rf2 Nf7 34. dxc6 Bxc6 35. Qa3 Nd6 36. Rxd8 Qxd8 37. Rd2 Qh4 38. Rxd6 Qe1+ 39. Kh2 Rc3 40. Qa5 Qxe3 41. Qf5+ Kg8 42. Rd8+ Be8 43. Rd1 Qg3+ 44. Kh1 Re3 45. a4 Bxa4 46. Qc8+ Be8 47. Rf1 {(Qg4) adjud. 0-1 (47) Fat Fritz 2-Dragon by Komodo Chess 64-bit Tenerife - 40 jugadas en 1 hora sin finish - 2021}) 16... Qc7 17. Bf4 Nd5 (17... Rae8 18. Qf3 b5 19. Bb3 Be6 20. c4 $11) 18. Bg3 $14 Rae8 {[#]} 19. Bd3 (19. Bb3 $14 {Pero en otro enfrentamiento informático, la ventaja duradera es difícil de concretar. Veamos el ejemplo:} Nf6 20. Qf3 Bg6 21. Bf4 a5 22. h3 Re7 23. Re3 Ra8 24. a4 Bxe5 25. Bxe5 Qb6 26. Bc4 Qd8 27. Bxf6 Rxe3 28. fxe3 gxf6 29. h4 h5 30. g4 Qe7 31. gxh5 Bxh5 32. Qf4 Kh7 33. Bd3+ Bg6 34. e4 Rh8 35. Kf2 Kg7 36. Rg1 c5 37. Be2 cxd4 38. cxd4 Qd8 39. h5 Qxd4+ 40. Qe3 Qxa4 41. hxg6 fxg6 {y los tres peones por la pieza, compensan.} 42. Rc1 Qd7 43. Bg4 Qd6 44. Rd1 Qh2+ 45. Kf3 Re8 46. Rd7+ Kh8 47. Rxb7 a4 48. Qc1 Rd8 49. Qe3 Re8 50. Rd7 f5 51. Qd4+ Qe5 52. Qxe5+ Rxe5 53. exf5 gxf5 $11 {Tablebases.} 54. Kf4 Rb5 55. Be2 Rb4+ 56. Kxf5 a3 57. Ra7 Kg8 58. Ke5 Kf8 59. Bf3 Rb2 60. Rxa3 {½-½ (60) Fat Fritz 2-Dragon by Komodo Chess 64-bit Tenerife - 40 jugadas en 1 hora sin finish - 2021}) 19... Bxd3 $11 20. Qxd3 f6 21. Nf3 Bxg3 22. hxg3 Qa5 23. c4 Nb6 24. Qb3 Qa4 {The position is equal.} 25. Qxa4 (25. Qc3 {looks sharper.} Rxe1+ 26. Qxe1 Qxa2 27. Qe7 Rf7 28. Qd8+) 25... Nxa4 26. c5 Rxe1+ 27. Nxe1 {[%mdl 4096] Endgame KRN-KRN} Re8 28. Kf1 Re4 29. Rc4 Nb2 30. Rc2 ({Wrong is} 30. Rb4 $2 {[#]} Rxe1+ $1 {[%mdl 512]} 31. Kxe1 Nd3+ 32. Kd2 Nxb4 $19) 30... Na4 31. Rc4 b5 32. cxb6 $1 Nxb6 33. Rxc6 Rxd4 34. Rc7 Rd7 35. Rc2 Rd4 36. Rc7 Rd7 {Weighted Error Value: White=0.08/Black=0.06} 1/2-1/2
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