Dutch - Staunton gambit - Tartakower variation
1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4
White pushes the queen's pawn to d4. Black plays the f-pawn to f5. White pushes the king's pawn to e4.
Black captures on e4 with the f-pawn. White develops the knight to c3. Black develops the knight to f6.
White pushes the g-pawn to g4.