About the Queen's Gambit Declined course
The most respected reply to 1.d4 for over a century: Black holds the centre, untangles slowly, and makes White prove something. You meet the Exchange and the rest of the family.
Lines are ordered from the shortest sideline to the deepest main line, straight from real master play — no frequency guesswork, no “secret tricks”, just the moves that are actually on the board when the position matters. Your progress is stored on this device.