ecocodes
Volume D · Closed and semi-closed games‹ D05D07 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

D06 Queen’s Gambit

D06 holds 13 named lines, all under the name Queen’s Gambit. It leaves D00 (Queen’s Pawn Game) with 2.c4. Lines of 56 other codes continue from its position, the widest spread of the 44 Queen’s Gambit codes. At three plies, its reference line is the shortest of the 44 Queen’s Gambit codes. Material is no longer level at the end of five of its lines; the widest gap, two pawns in Black’s favour, comes in Queen’s Gambit Declined: Baltic Defense, Argentinian Gambit.

Score sheet
#WhiteBlack
1d4d5
2c4

The move that completes D06

The reference line of D07 plays all of these moves and continues beyond them; D06 is the position reached at 2.c4.

  1. 2.c4 The c-pawn advances two squares to c4, covering b5 and d5, opening a line for the queen on d1.

Lines filed under D06

All 13 share their first three plies, the whole reference line and then split four ways at Black’s move 2.

NameAfter the shared startPliesAt the end
Queen’s Gambit(the shared start itself)3
Queen’s Gambit Declined: Austrian Defense2...c54
Queen’s Gambit Declined: Baltic Defense2...Bf54
Queen’s Gambit Declined: Marshall Defense2...Nf64
Queen’s Gambit Declined: Zilbermints Gambit2...b54
Queen’s Gambit Declined: Baltic Defense, Queen Attack2...Bf5 3.Qb35
Queen’s Gambit Declined: Austrian Attack, Salvio Countergambit2...c5 3.dxc5 d46White +1
Queen’s Gambit Declined: Austrian Defense, Gusev Countergambit2...c5 3.cxd5 Nf66White +1
Queen’s Gambit Declined: Marshall Defense, Tan Gambit2...Nf6 3.cxd5 c66White +1
Queen’s Gambit Declined: Baltic Defense, Queen Attack Deferred2...Bf5 3.Nc3 e6 4.Qb37
Queen’s Gambit Declined: Baltic Defense, Pseudo-Chigorin2...Bf5 3.Nc3 e6 4.Nf3 Nc68
Queen’s Gambit Declined: Austrian Defense, Haberditz Variation2...c5 3.cxd5 Nf6 4.e4 Nxe4 5.dxc5 Qa5+10White +1, check
Queen’s Gambit Declined: Baltic Defense, Argentinian Gambit2...Bf5 3.cxd5 Bxb1 4.Qa4+ c6 5.dxc6 Nxc610Black +2

The road to D06

  1. 1.d4A40 Queen’s Pawn Game
  2. 1...d5D00 Queen’s Pawn Game
  3. 2.c4D06

The position after 2.c4

Black could capture with dxc4. Undefended and attacked: the pawn on c4. Black is to move and has 28 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed00Moves spent on pawns21Pawns on d4, e4, d5, e511Squares attacked in the other half64not castlednot castled

Codes that branch off from D06

The reference lines of five other codes leave D06 from the position after 2.c4, each with its own moves.

CodeMovesReference line
D072...Nc6Queen’s Gambit Declined: Chigorin Defense
D082...e5Queen’s Gambit Declined: Albin Countergambit
D102...c6Slav Defense
D202...dxc4Queen’s Gambit Accepted
D302...e6Queen’s Gambit Declined

Closest boards in other codes

CodeLineDiffers on
A09Réti Openingfour squares: g1, d2, f3, d4
A10English Openingfour squares: d2, d4, d5, d7
A40Queen’s Pawn Gamefour squares: c2, c4, d5, d7
A41Queen’s Pawn Gamefour squares: c2, c4, d5, d6
A50Indian Defense: Normal Variationfour squares: d5, f6, d7, g8
A53Old Indian Defensefour squares: d5, d6, f6, g8
A84Dutch Defensefour squares: d5, f5, d7, f7

Where lines continue from here

Besides the codes above, they belong to D09, D11, D12, D13, D14, D15, D16, D17, D18, D19, D21, D22, D23, D24, D25, D26, D27, D28, D29, D31, D32, D33, D34, D35, D36, D37, D40, D41, D43, D44, D45, D46, D47, D48, D49, D50, D51, D52, D53, D56, D57, D58, D59, D61, D63, D66, D67, D68, D69, D94, E09.

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
  27. 26
  28. 27
  29. 28
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  31. 30
  32. 31
  33. 32
  34. 33
  35. 34
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  38. 37
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  40. 39
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  42. 41
  43. 42
  44. 43
  45. 44
  46. 45
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  54. 53
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  92. 91
  93. 92
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  96. 95
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  98. 97
  99. 98
  100. 99

Volume E

  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
  27. 26
  28. 27
  29. 28
  30. 29
  31. 30
  32. 31
  33. 32
  34. 33
  35. 34
  36. 35
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  38. 37
  39. 38
  40. 39
  41. 40
  42. 41
  43. 42
  44. 43
  45. 44
  46. 45
  47. 46
  48. 47
  49. 48
  50. 49
  51. 50
  52. 51
  53. 52
  54. 53
  55. 54
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  93. 92
  94. 93
  95. 94
  96. 95
  97. 96
  98. 97
  99. 98
  100. 99

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