The King's Indian Variation, Sokolsky Attack is a variation of the Polish Opening, catalogued as ECO A00. The line runs 1. b4 Nf6 2. Bb2 g6 3. c4 Bg7 4. e3 d6 5. Nf3 O-O 6. d4, reaching the position shown below after 11 half-moves.
White holds the centre with pawns on d4. Development is level at two minor pieces each. It is Black to move after six moves. Black has castled while White’s king is still uncommitted.
On the Polish Opening generally: An unusual flank opening with 1.b4. Aims for long-term pressure on the queenside.
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The King's Indian Variation, Sokolsky Attack goes 1. b4 Nf6 2. Bb2 g6 3. c4 Bg7 4. e3 d6 5. Nf3 O-O 6. d4. It is a variation of the Polish Opening and is catalogued as ECO A00.
The King's Indian Variation, Sokolsky Attack is ECO A00. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Polish Opening.
Stockfish evaluates the position after 1. b4 Nf6 2. Bb2 g6 3. c4 Bg7 4. e3 d6 5. Nf3 O-O 6. d4 at -0.21 at depth 18, which is balanced. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
White holds the centre with pawns on d4. Development is level at two minor pieces each. It is Black to move. Black has castled while White’s king is still uncommitted.