King's Gambit Accepted - Villemson (Steinitz) gambit
1. e4 e5 2. f4 exf4 3. d4
White plays the king's pawn to e4. Black plays the king's pawn to e5. White pushes the f-pawn to f4.
Black captures on f4 with the king's pawn. White pushes the queen's pawn to d4.