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Sicilian Defense: Acton Extension: Moves, Plans & Analysis

The position

What Sicilian Defense: Acton Extension puts on the board

Material is level, with white to move.

White has central pawns on e4.

White can still castle either side; Black can still castle either side.

White’s plan

What White is trying to build

Use the lead in development before Black’s queenside structure becomes active.

Choose a clear setup: an open d-file after d4, or a slower closed kingside expansion.

Black’s plan

How Black challenges it

Use the c-file and queenside pawn majority as active assets.

Finish development before starting pawn play on the wing.

The idea

The tactical pattern to recognise

A rook or queen on the half-open c-file can attack c2.

Central breaks with d4 or …d5 often change the position at once.

The mistake

What to check before committing

Launching a flank attack while pieces remain on their original squares.

Allowing a central break to arrive with tempo on the queen or king.

Continue

Choose the next book move

Preview a move to see the resulting position and the idea behind it. Select it to continue on the same board.