Robatsch defence - Pseudo-Austrian attack
1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4
White plays the king's pawn to e4. Black advances the g-pawn to g6. White moves the queen's pawn to d4.
Black develops the dark-squared bishop to g7. White develops the knight to c3. Black pushes the queen's pawn to d6.
White advances the f-pawn to f4.