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King's Indian Attack: Smyslov Variation is a chess opening that arises after 1.Nf3 Nf6 2.g3 g6 3.b4. It is classified A05 in the ECO system, and the position after these moves has black to move.
This line is a variation within the King's Indian Attack family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 1.Nf3 Nf6 2.g3 g6 3.b4.