Dutch - Staunton gambit - Nimzovich variation
1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 b6
White advances the queen's pawn to d4. Black pushes the f-pawn to f5. White plays 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 develops the dark-squared bishop to g5. Black plays the b-pawn to b6.