Queen's Indian - Miles variation
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Bf4
White plays the queen's pawn to d4. Black develops the knight to f6. White pushes the c-pawn to c4.
Black moves the king's pawn to e6. White develops the knight to f3. Black advances the b-pawn to b6.
White develops the dark-squared bishop to f4.