King's Gambit Accepted - Schallop defence
1. e4 e5 2. f4 exf4 3. Nf3 Nf6
White advances the king's pawn to e4. Black moves the king's pawn to e5. White moves the f-pawn to f4.
Black captures on f4 with the king's pawn. White develops the knight to f3. Black develops the knight to f6.