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London System: Moves, Plans & Analysis

The position

What London System puts on the board

Material is level, with black to move.

White has central pawns on d4.

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

White’s plan

What White is trying to build

Support d4, complete the familiar minor-piece setup and choose e4 or c4 as the freeing break.

Do not let the system move order replace calculation of Black’s threats.

Black’s plan

How Black challenges it

Challenge the centre early with …c5 or …e5.

Develop the queen bishop actively and avoid giving White an uncontested setup.

The idea

The tactical pattern to recognise

The h2–b8 bishop diagonal can support a kingside attack.

A queen on b6 may attack both b2 and d4.

The mistake

What to check before committing

Playing the setup automatically after Black has changed the pawn structure.

Allowing e4 without creating counterplay against d4.

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.