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Chess openings

Opening family

Queen's Gambit Declined Lines and Variations

The Queen's Gambit Declined family contains 171 named lines in this opening book, spanning ECO D02 to D69. Use this page as the map, then open individual lines for exact move orders and diagrams.

Named lines
171
ECO coverage
D02, D06, D07, D08 ... D67, D68, D69
ECO volume
D (closed and semi-closed queen-pawn openings)
Shortest line
D06 Queen's Gambit Declined: Austrian Defense: 1. d4 d5 2. c4 c5

How to study this family

White

White uses the c-pawn to challenge Black’s d5 pawn, then plays for space, piece activity, and pressure on the queenside.

Black

Black declines the pawn to keep a compact center and aims for freeing breaks such as ...c5 or ...e5.

Start with the shortest line, then branch to the variations that change the pawn structure or tactical target. Memorizing every branch before understanding the family plan is usually wasted work.

Main named lines

Deep theory branches

Start with the root lineDrill this family