Queen's Indian - Yates variation
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 a5
White plays the queen's pawn to d4. Black develops the knight to f6. White advances the c-pawn to c4.
Black moves the king's pawn to e6. White develops the knight to f3. Black moves the b-pawn to b6.
White advances the g-pawn to g3. Black develops the light-squared bishop to b7. White develops the light-squared bishop to g2.
Black deploys the dark-squared bishop to b4, giving check. White moves the dark-squared bishop to d2. Black advances the a-pawn to a5.