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1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.O-O O-O 5.d3 d5 · ECO A05
King's Indian Attack: Wahls Defense is a chess opening that arises after 1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.O-O O-O 5.d3 d5. It is classified A05 in the ECO system, and the position after these moves has white 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.Bg2 Bg7 4.O-O O-O 5.d3 d5.