Chess opening
Queen's Gambit Declined: Been-Koomen VariationD50
The Queen's Gambit Declined: Been-Koomen Variation is a chess opening classified under ECO code D50. It is reached after the moves:
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5
Play it vs Stockfish Open in analysis board
Comes from
Main continuations
- Queen's Gambit Declined: Pseudo-Tarrasch Variation (D50)
- Queen's Gambit Declined: Pseudo-Tarrasch Variation, Primitive Pillsbury Variation (D50)
- Queen's Gambit Declined: Semi-Tarrasch Defense, Krause Variation (D50)
Related lines in the Queen's Gambit Declined
- Queen's Gambit Declined: Baltic Defense, Pseudo-Slav (D02)
- Queen's Gambit Declined: Austrian Attack, Salvio Countergambit (D06)
- Queen's Gambit Declined: Austrian Defense (D06)
- Queen's Gambit Declined: Austrian Defense, Gusev Countergambit (D06)
- Queen's Gambit Declined: Austrian Defense, Haberditz Variation (D06)
- Queen's Gambit Declined: Baltic Defense (D06)
- Queen's Gambit Declined: Baltic Defense, Argentinian Gambit (D06)
- Queen's Gambit Declined: Baltic Defense, Pseudo-Chigorin (D06)
Train this opening
LibreChess runs Stockfish in your browser — play the Queen's Gambit Declined against the engine at any strength, get hints, and review your game move by move afterwards. Free, no account needed. You can also add this line to your repertoire and drill it with spaced repetition.