Center Game: Halasz-McDonnell Gambit, Crocodile Variation

The Center Game: Halasz-McDonnell Gambit, Crocodile Variation is a chess opening classified under ECO code C21 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 5 moves: 1. e4 e5 2. d4 exd4 3. f4 Bc5 4. Nf3 Nc6 5. c3. The resulting position leaves black to move.