We Are continuing our d4 theory with some Queen’s gambit studies. Today’s lesson will be how to play the Semi-Tarrasch Defense of the Queen’s gambit declined with some beautiful tactical and strategical elements.

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PGN OF THE GAMES IN THE VIDEO:

[Event "Buenos Aires Duchamp Memorial-A 4th"]
[Site "[ Ссылка ]"]
[Date "2012.10.25"]
[Round "3"]
[White "Mareco, Sandro (2581)"]
[Black "Peralta, Fernando (2593)"]
[Result "0-1"]
[WhiteElo "?"]
[BlackElo "?"]
[Variant "Standard"]
[TimeControl "-"]
[ECO "D50"]
[Opening "Queen's Gambit Declined: Pseudo-Tarrasch Variation, Primitive Pillsbury Variation"]
[Termination "Normal"]
[Annotator "lichess.org"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 c5 5. Bg5 cxd4 6. Qxd4 { D50 Queen's Gambit Declined: Pseudo-Tarrasch Variation, Primitive Pillsbury Variation } Nc6 7. Bxf6 gxf6 8. Qh4 dxc4 9. e3 f5 10. Qxc4 Bg7 11. Be2 O-O 12. O-O Qb6 13. Na4 Qb4 14. Qc2 Rd8 15. Rfd1 Bd7 16. a3 Qe7 17. e4?! { (-0.24 → -0.81) Inaccuracy. Nc5 was best. } (17. Nc5 Be8 18. Rxd8 Rxd8 19. Rc1 Rc8 20. Qb1 Ne5 21. Nxe5 Rxc5 22. Nd3 Rxc1+ 23. Qxc1 Qd8) 17... fxe4 18. Qxe4 Be8 19. Bd3?! { (-0.51 → -1.26) Inaccuracy. Qe3 was best. } (19. Qe3 h6 20. Nc3 a6 21. Rac1 Rxd1+ 22. Bxd1 Rd8 23. Bb3 Na5 24. Ba2 Qc7 25. Ne2 Qb8) 19... Nd4 20. Qxh7+ Kf8 21. Nc3 Nxf3+ 22. gxf3 Rd4 23. Be4 f5 24. Rxd4 Bxd4 25. Qxe7+?! { (-0.71 → -1.35) Inaccuracy. Qh6+ was best. } (25. Qh6+ Qg7+ 26. Qxg7+ Kxg7 27. Ne2 Bxb2 28. Rb1 Bxa3 29. Rxb7+ Kf6 30. Rb3 fxe4 31. Rxa3 exf3) 25... Kxe7 26. Bd3?! { (-1.07 → -1.63) Inaccuracy. Ne2 was best. } (26. Ne2 Bxb2) 26... Bc6 27. Re1 Bxf3 28. Bc4 e5 29. Nd5+ Bxd5?! { (-1.55 → -0.91) Inaccuracy. Kd6 was best. } (29... Kd6 30. Ne3) 30. Bxd5 Kd6 31. Bxb7 Rb8 32. Ba6 Rxb2 33. Re2 Rb3 34. Kg2 e4 35. a4 Ke5 36. Bc4 Rb7 37. Bb5 Rc7 38. f3 Kf4 39. fxe4 Rg7+ 40. Kh3 Rh7+ 41. Kg2 Rg7+ 42. Kh3 Kf3 43. Kh4 fxe4 44. Kh5 a6 45. Bxa6?? { (-1.20 → -5.11) Blunder. Bc4 was best. } (45. Bc4 Rc7 46. Rc2 Kf4 47. Bb3 Rh7+ 48. Kg6 Rg7+ 49. Kh6 e3 50. Rc4 e2 51. Rxd4+ Ke3) 45... Be3 46. Bb5? { (-4.70 → -15.50) Mistake. Rc2 was best. } (46. Rc2 Rh7+) 46... Rg5+ 47. Kh6 Rg2+ 48. Rxe3+ Kxe3 49. h4 Kf4 50. h5?! { (-19.06 → Mate in 22) Checkmate is now unavoidable. a5 was best. } (50. a5) 50... e3 51. a5 e2 52. Bxe2 Rxe2 53. a6 Re6+ 54. Kg7 Kg5 { White resigns. } 0-1

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. Bg5 cxd4 6. Qxd4 Nc6 7. Qh4 Be7 8. cxd5 exd5 9. Rd1 Qb6 10. Rd2 Be6 11. e3 h6 12. Bxf6 Bxf6 13. Qa4 d4 14. Nxd4 O-O-O 15. Nce2 Nxd4 16. Nxd4 Bxd4 17. exd4 Bd5 18. f3 Rhe8+ 19. Be2 Bc6 20. Qc4 Kb8 21. O-O Bd5 22. Qa4 Bxa2 23. Bb5 Re5 24. Qxa2 Rxb5 25. Qxf7 Rxd4 26. Rxd4 Qxd4+ 27. Kh1 a6 28. b3 Ka7 29. h3 h5 30. Rc1 Qe3 31. Rb1 Qc3 32. Qf4 g5 33. Qf7 h4 34. Qg6 a5 35. Qe6 a4 36. Qe8 Rb4 37. Qd8 Rxb3 38. Rd1 Qc5 39. Qd2 Rc3 40. f4 gxf4 41. Qxf4 Rc4 42. Qd2 a3 43. Ra1 Rc3 44. Qf4 b5 45. Re1 Ka6 46. Qf6+ Ka5 47. Qd8+ Ka4 48. Qd1+ Ka5 49. Qd8+ Ka4 50. Qd1+ Kb4 51. Re4+ Rc4 52. Qd2+ Ka4 53. Qd1+ Ka5 54. Qd8+ Qc7 55. Qd2+ Ka6 56. Re1 Qc6 57. Qd3 Rc3 58. Qf5 Rc1 59. Rxc1 Qxc1+ 60. Kh2 Qc7+ 61. Kh1 Ka5 62. Qf3 Qe7 63. Qd5 Qe1+ 64. Kh2 Qg3+ 65. Kh1 Qe1+ 66. Kh2 Qg3+ 67. Kh1 Qc7 68. Qe4 Qc1+ 69. Kh2 Qc7+ 70. Kh1 Qc4 71. Qe1+ b4 72. Qe5+ Ka4 73. Kh2 Qc3 74. Qe8+ Kb3 75. Qe6+ Kb2 76. Qe2+ Qc2 77. Qe5+ Ka2 78. Qd5+ b3 79. Qd6 b2 80. Qd5+ Qb3 81. Qd2 Qg3+ 82. Kh1 Qe1+

1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. d4 cxd4 5. Nxd4 d5 6. Bg5 e5 7. Nf3 d4 8. Nd5 Nc6 9. e3 Qa5+ 10. Qd2 Qxd2+ 11. Nxd2 Nxd5 12. cxd5 Nb4 13. O-O-O f6 14. Bh4 dxe3 15. fxe3 Nxd5 16. Ne4 Nxe3 17. Bb5+ Ke7 18. Rd3 Nxg2 19. Bf2 Be6 20. Nd6 Nf4 21. Rd2 Bd5

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