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Bogo-Indian Defense: Grünfeld Variation is a chess opening that arises after 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Nbd2. It is classified E11 in the ECO system, and the position after these moves has black to move.
This line is a variation within the Bogo-Indian Defense family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Nbd2.
Each of these is a named opening reached by playing on from 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Nbd2. Open any of them to load the position on the board.