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1.b4 Nf6 2.Bb2 g6 3.c4 Bg7 4.e3 d6 5.Nf3 O-O 6.d4 · ECO A00
Polish Opening: King's Indian Variation, Sokolsky Attack is a chess opening that arises after 1.b4 Nf6 2.Bb2 g6 3.c4 Bg7 4.e3 d6 5.Nf3 O-O 6.d4. It is classified A00 in the ECO system, and the position after these moves has black to move.
This line is a variation within the Polish Opening family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 1.b4 Nf6 2.Bb2 g6 3.c4 Bg7 4.e3 d6 5.Nf3 O-O 6.d4.