King's Gambit Accepted - Rosentreter gambit
1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4
White advances the king's pawn to e4. Black moves the king's pawn to e5. White advances the f-pawn to f4.
Black captures on f4 with the king's pawn. White develops the knight to f3. Black moves the g-pawn to g5.
White moves the queen's pawn to d4.