Queen's Indian Defense

1. d4 Nf6 2. c4 e6 3. Nf3 b6

Queen's Indian Defense is catalogued under ECO code E12. It is reached after 3 moves (6 half-moves): 1. d4 Nf6 2. c4 e6 3. Nf3 b6. After the last move it is White to play. White opens 1. d4. It is the defining line of the Queen's Indian Defense family, which has 53 catalogued lines in total. 9 deeper lines continue from here, listed below.

Position shown after the last move; White to play.