Queen's Gambit

Best move for black is declined gambit

[Event "Declined"] [White "Declined"] 1. d4 d5 2. c4 e6 [Event "Accepted"] [White "Accepted"] {Accepting gambit is not a good idea for black as white can regain piece and position advantage} 1. d4 d5 2. c4 dxc4 3. Qa4+ Bd7 4. Qxc4