Latvian Gambit: Corkscrew Countergambit

The Latvian Gambit: Corkscrew Countergambit is a chess opening classified under ECO code C40 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 4 moves: 1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Nf6. The resulting position leaves white to move.