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Modern Defense: Geller's System: Moves, Plans & Analysis

The position

What Modern Defense: Geller's System puts on the board

Material is level, with black to move.

White has central pawns on d4 and e4.

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

White’s plan

What White is trying to build

Use the centre, but keep it supported against …c5 and …e5.

Develop before committing to an all-in kingside pawn attack.

Black’s plan

How Black challenges it

Attack the broad centre from the flanks rather than accepting permanent space disadvantage.

Time …c5 or …e5 so the g7 bishop joins the game.

The idea

The tactical pattern to recognise

A pawn storm can expose both kings if the centre opens.

The long diagonal becomes tactical when d4 moves or disappears.

The mistake

What to check before committing

Overextending the centre without enough development.

Waiting too long to challenge White’s central pawns.

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.