King's Indian Defense, Sämisch Variation

The Sämisch Variation of the King's Indian Defense is identified by f3. That pawn reinforces White's e4-pawn and controls g4, making it harder for a black knight to jump there. White builds a sturdy center before deciding where the king belongs.

The cost is that f3 occupies the natural square of White's g1-knight. White often develops that knight through e2 and may use Be3, Qd2, and in many lines queenside castling. Castling queenside places the king on the queenside and leaves the g- and h-pawns freer to advance in a kingside attack.

Black should not wait passively. Typical active plans include challenging White's center with ...e5 or ...c5 and, in some structures, expanding on the queenside with ...b5. The resulting game often depends on which side can open useful lines first without exposing its own king too much.

f3 supports the center and changes White's development

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Startf3O-OBe3

f3 supports e4 and controls g4, but it occupies the g1-knight's natural square.

The Sämisch begins with a pawn decision

White reinforces the center before deciding where to place the king.

1. f3 supports e4 and controls g4, but it occupies the g1-knight's natural square.