French - Wing gambit
1. e4 e6 2. Nf3 d5 3. e5 c5 4. b4
White pushes the king's pawn to e4. Black plays the king's pawn to e6. White develops the knight to f3.
Black advances the queen's pawn to d5. White moves the king's pawn to e5. Black advances the c-pawn to c5.
White plays the b-pawn to b4.