King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Morphy Defense

The King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Morphy Defense is a chess opening classified under ECO code C31 in the Open Games & French Defense family, beginning with 1.e4 e5 or 1.e4 e6, including the Italian Game, Ruy Lopez, and French Defense. It is reached after 6 moves: 1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. exd5 e4 5. d3 Bb4 6. Bd2 e3. The resulting position leaves white to move.