Duda - Mamedov | White needs tempi to consolidate to take advantage of two bishops

Duda plays popular variation of London allowing Bb4 check and king staying in the center. However White gets two bishops which will pay of if White manages to consolidate his forces.

2019 King Salman World Rapid & Blitz Championships
Moscow, 2019
Duda, Jan-Krzysztof - Mamedov, Rauf
1. d4 d5 2. Bf4 Bf5 3. e3 e6 4. c4 Bxb1 5. Qxb1 Bb4+ 6. Kd1 Nf6 7. Nf3 O-O 8. Bg3 c5 9. a3 Ba5 10. b4 cxd4 11. bxa5 dxe3 12. fxe3 dxc4+ 13. Ke1 Nc6 14. Bxc4 Qxa5+ 15. Ke2 Rac8 16. Qb5 Ne4 17. Qxa5 Nxa5 18. Bd3 Nc3+ 19. Kf2 Nb3 20. Rae1 Rfd8 21. Bc2 Nc5 22. Rc1 N5e4+ 23. Bxe4 Nxe4+ 24. Ke2 Nc3+ 25. Kf1 f6 26. Be1 Ne4 27. Rxc8 Rxc8 28. Ke2 Rc1 29. Rf1 Ra1 30. Bb4 Ra2+ 31. Kd3 f5 32. Nd2 Nxd2 33. Bxd2 Rxa3+ 34. Bc3 b5 35. Rb1 a6 36. Kc2 Ra2+ 37. Bb2 Ra4 38. Rd1 Rc4+ 39. Kb3 Re4 40. Rd8+ Kf7 41. Rd7+ Ke8 42. Rxg7 Rxe3+ 43. Kb4 h5 44. Bf6 h4 45. h3 Rd3 46. Ka5 f4 47. Bxh4 f3 48. gxf3 Rxf3 49. Bg3 e5 50. Kxa6 b4 51. Bxe5 Rxh3 52. Rb7 Rh6+ 53. Ka7 Re6 54. Rb8+ Kd7 55. Bd4 Re4 56. Bc5 Kc6 57. Bxb4 Re2 58. Rb6+ Kd5 59. Bf8 Re8 60. Bb4 Re2 61. Ka6 Rb2 62. Kb5 Re2 63. Rd6+ Ke5 64. Bc5 Rb2+ 65. Kc6 Rc2 66. Rd8 Ke4 67. Re8+ Kd3 68. Kd5 Re2 69. Ra8 Rc2 70. Bd4 Rc7 71. Ra3+ Ke2 72. Be5 Re7 73. Ke4 Re8 74. Ra2+ Ke1 75. Rb2 Re7 76. Kd4 Kf1 77. Bf4 Re2 78. Rb1+ Re1 79. Rb3 Re8 80. Be3 Ke2 81. Rb2+ Kf3 82. Rf2+ Kg3 83. Rf7 Kg4 84. Bf4 Kf3 85. Be5+ Ke2 86. Bg3 Rd8+ 87. Ke4 Re8+ 88. Be5 Ke1 89. Rf5 Ke2 90. Rh5 Ke1 91. Ke3 Kd1 92. Kd3 Ke1 93. Rf5 Rd8+ 94. Bd4 Rd7 95. Rf8 Rd6 96. Rb8 Kf1 97. Rg8 1-0


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Blitz chess (also known as speed or fast chess) is a type of chess in which each player is given less time to consider their moves than normal tournament time controls allow. Openings, tactics and strategy are same.
The London System is a chess opening that usually arises after 1.d4 and 2.Bf4, or 2.Nf3 and 3.Bf4. It is a "system" opening that can be used against virtually any black defence and thus comprises a smaller body of opening theory than many other openings. The London System is one of the Queen's Pawn Game openings where White opens with 1.d4 but does not play the Queen's Gambit. It normally results in a closed game.

Sverre Johnsen and Vlatko Kovačević, in the introduction to their 2005 book Win with the London System, state:

Basically the London is a set of solid lines where after 1.d4 White quickly develops his dark-squared bishop to f4 and normally bolsters his centre with [pawns on] c3 and e3 rather than expanding. Although it has the potential for a quick kingside attack, the white forces are generally flexible enough to engage in a battle anywhere on the board. Historically it developed into a system mainly from three variations:

1.d4 d5 2.Nf3 Nf6 3.Bf4
1.d4 Nf6 2.Nf3 e6 3.Bf4
1.d4 Nf6 2.Nf3 g6 3.Bf4

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