Queen's Gambit Accepted: Central Variation, McDonnell Defense, Somov Gambit

The Queen's Gambit Accepted: Central Variation, McDonnell Defense, Somov Gambit is a chess opening classified under ECO code D20 in the Closed & Semi-Closed Games family, arising from 1.d4 d5, including the Queen's Gambit, Slav Defense, and related systems. It is reached after 4 moves: 1. d4 d5 2. c4 dxc4 3. e4 e5 4. Bxc4. The resulting position leaves black to move.