King's Pawn Game: Clam Variation, King's Gambit Reversed

The King's Pawn Game: Clam Variation, King's Gambit Reversed is a chess opening classified under ECO code C20 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 2 moves: 1. e4 e5 2. d3 f5. The resulting position leaves white to move.