Danish gambit
1. e4 e5 2. d4 exd4 3. c3
White advances the king's pawn to e4. Black moves the king's pawn to e5. White advances the queen's pawn to d4.
Black captures on d4 with the king's pawn. White moves the c-pawn to c3.
White advances the king's pawn to e4. Black moves the king's pawn to e5. White advances the queen's pawn to d4.
Black captures on d4 with the king's pawn. White moves the c-pawn to c3.