ecocodes
Volume D · Closed and semi-closed games‹ D67D69 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

D68 Queen’s Gambit Declined: Orthodox Defense, Classical Variation

D68 holds three named lines, all under the name Queen’s Gambit. It leaves D67 (Queen’s Gambit Declined: Orthodox Defense, Main Line) with 11...Nxc3 12.Rxc3 e5. Six captures are made along the reference line, the second-highest count of the 44 Queen’s Gambit codes. At 24 plies, its reference line is the second-longest of the 44 Queen’s Gambit codes. White, to move in that position, has 41 legal moves, the fourth-highest count of the 44 Queen’s Gambit codes.

Score sheet
#WhiteBlack
1d4d5
2c4e6
3Nc3Nf6
4Bg5Be7
5e3O-O
6Nf3Nbd7
7Rc1c6
8Bd3dxc4
9Bxc4Nd5
10Bxe7Qxe7
11O-ONxc3
12Rxc3e5

The move that completes D68

The reference line of D69 plays all of these moves and continues beyond them; D68 is the position reached at 12...e5.

  1. 12...e5 The e-pawn advances to e5, covering d4 and f4, opening a line for the queen on e7.

Lines filed under D68

All three share the start 1.d4 and then split two ways at Black’s move 1.

NameAfter the shared startPliesAt the end
Queen’s Gambit Declined: Orthodox Defense, Classical Variation1...d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.O-O Nxc3 12.Rxc3 e524both castled
Queen’s Gambit Declined: Orthodox Defense, Classical Variation1...d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 Be7 5.Bg5 O-O 6.e3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.O-O Nxc3 12.Rxc3 e5 13.Qb125both castled
Queen’s Gambit Declined: Orthodox Defense, Classical Variation1...Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 O-O 6.e3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.O-O Nxc3 12.Rxc3 e5 13.Qc225both castled

Queen’s Gambit Declined: Orthodox Defense, Classical Variation

  1. 1...d5 The d-pawn advances two squares to d5, covering c4 and e4, opening a line for the bishop on c8 and the queen on d8.
  2. 2.c4 The c-pawn advances two squares to c4, covering b5 and d5, opening a line for the queen on d1.
  3. 2...e6 The e-pawn advances to e6, covering d5 and f5, opening a line for the queen on d8 and the bishop on f8.
  4. 3.Nf3 The knight leaves g1 for f3, opening a line for the rook on h1.
  5. 3...Nf6 The knight leaves g8 for f6, opening a line for the rook on h8.

Queen’s Gambit Declined: Orthodox Defense, Classical Variation

  1. 1...Nf6 The knight leaves g8 for f6, opening a line for the rook on h8.
  2. 2.c4 The c-pawn advances two squares to c4, covering b5 and d5, opening a line for the queen on d1.
  3. 2...e6 The e-pawn advances to e6, covering d5 and f5, opening a line for the queen on d8 and the bishop on f8.
  4. 3.Nf3 The knight leaves g1 for f3, opening a line for the rook on h1.
  5. 3...d5 The d-pawn advances two squares to d5, covering c4 and e4, opening a line for the bishop on c8 and the queen on d8.

The road to D68

Four of the 16 named positions on the way are reached by a move order other than their own.

  1. 1.d4 … 10.Bxe714 earlier stops: A40, D00, D06, D30, D31, D35, D50, D53, D55, D60, D63, D66, D67
  2. 10...Qxe7D67 Bd3 Line
  3. 11.O-OD67 Main Line
  4. 12...e5D68

The position after 12...e5

White has brought out the knight on f3 and bishop on c4; Black the knight on d7. White has a half-open c-file; Black a half-open d-file. White could capture with Bxf7+, Nxe5, dxe5.

WhiteBlackMaterial (pawn units)3232Minor pieces developed21Moves spent on pawns35Pawns on d4, e4, d5, e511Squares attacked in the other half85castled kingside, move 11castled kingside, move 5

Codes that branch off from D68

The reference lines of one other code leave D68 from the position after 12...e5, each with its own moves.

CodeMovesReference line
D6913.dxe5 Nxe5 14.Nxe5 Qxe5Queen’s Gambit Declined: Orthodox Defense, Classical Variation

Closest boards in other codes

CodeLineDiffers on
E55Nimzo-Indian Defense: Normal Variation, Gligoric System, Bronstein Variation11 squares: a1, c1, c3, b4, c5, e5, c6, e6 …
E54Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation13 squares: a1, c1, c3, b4, c5, e5, c6, e6 …
D88Grünfeld Defense: Exchange Variation, Spassky Variation14 squares: a1, b2, e2, c3, e3, f3, e4, e5 …
E57Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense14 squares: a1, c1, a2, a3, c3, b4, d4, e5 …
E59Nimzo-Indian Defense: Normal Variation, Bernstein Defense14 squares: a1, c1, a2, b2, a3, c3, c5, e5 …
D66Queen’s Gambit Declined: Orthodox Defense, Bd3 Line15 squares: c1, e1, f1, g1, h1, c3, d3, c4 …
E56Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense15 squares: a1, c1, c3, d3, b4, c4, c5, d5 …

Where lines continue from here

One named line filed under other codes passes through the position after 12...e5. It belongs to the code listed above.

Volume D

  1. 00
  2. 01
  3. 02
  4. 03
  5. 04
  6. 05
  7. 06
  8. 07
  9. 08
  10. 09
  11. 10
  12. 11
  13. 12
  14. 13
  15. 14
  16. 15
  17. 16
  18. 17
  19. 18
  20. 19
  21. 20
  22. 21
  23. 22
  24. 23
  25. 24
  26. 25
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  32. 31
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  41. 40
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  44. 43
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  67. 66
  68. 67
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  92. 91
  93. 92
  94. 93
  95. 94
  96. 95
  97. 96
  98. 97
  99. 98
  100. 99

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