King's Indian Defence: Sämisch Variation
Also known as Sämisch KID
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3
In the Sämisch, White answers the King's Indian with the rugged 5.f3, cementing the e4-pawn and sketching out a kingside pawn storm. It is a fighting try where both sides often attack on opposite wings, leading to sharp, double-edged positions.
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What it does
The move 5.f3 does two jobs at once. First, it gives the e4-pawn extra support so White can keep a big d4–e4 centre without fearing ...Nxe4 tricks. Second, it clears the way for a later g2-g4 and h2-h4 advance, so White can launch his own attack on Black's castled king rather than just defending. With f3 in place, White usually develops with Be3, Qd2 and the knight to e2, then chooses between castling long and storming the kingside, or playing on the queenside.
When to use it
Reach for the Sämisch when you face the King's Indian and want to meet it head-on with a space advantage and attacking chances of your own. It suits players who enjoy a long-term plan and rich, strategic middlegames, and who are happy to study some theory. Because the lines can become very sharp – especially if White castles queenside and both sides race to attack – it rewards preparation and is best treated as an advanced weapon rather than a quick fix.
Why it works
The King's Indian invites White to build a broad centre, then tries to break it down. By supporting e4 with f3, White takes the sting out of those breaks and keeps a durable space edge. The same pawn becomes the launch-pad for g4 and h4, so White can attack on the same side where Black has castled. Done well, White gets the best of both worlds: a solid centre and a kingside initiative, which puts real pressure on Black's counterplay.
Key ideas
- f3 supports e4 and stops ...Ng4 and ...Nxe4 ideas
- Develop with Be3, Qd2 and Ng1-e2, keeping f3 intact
- Plan g4 and h4 to storm Black's castled king
- Castling long sharpens the opposite-wing race
- Meet ...c5 with d5, gaining space and closing the centre
- Watch the d4-square and the long-diagonal bishop
Watch out
A classic pitfall is the Sämisch Gambit: 5...e5 6.dxe5 dxe5 7.Qxd8+ Kxd8 costs Black castling but gives active play, so White usually keeps the centre closed instead. Meet ...c5 with d5 rather than easing exchanges, and never relax about the long diagonal – a loose d4 or careless queenside king invites ...Qa5 and ...b5 storms.