Queen's Indian - Nimzovich variation (exaggerated fianchetto)
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6
White advances the queen's pawn to d4. Black develops the knight to f6. White pushes the c-pawn to c4.
Black plays the king's pawn to e6. White develops the knight to f3. Black pushes the b-pawn to b6.
White plays the g-pawn to g3. Black develops the light-squared bishop to a6.