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King's Indian Defence: the Samisch Variation

The Samisch arises in the King's Indian after 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 (ECO E80). The move f3 reinforces the e4 centre and prepares castling long with a pawn storm on the kingside.

It is one of the most ambitious systems against the King's Indian: White gets a firm centre and space, often castles queenside and goes g4-h4. Black answers with the ...e5 or ...c5 breaks and counterplay.

The Samisch is a formidable, aggressive weapon for White, leading to a sharp fight with opposite-side castling. It asks both sides for accurate play.

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