King's Indian Defense

The King's Indian Defense (1.d4 Nf6 2.c4 g6 3.Nc3) is a dynamic and exceptionally complex reply to 1.d4. Black lets White build a big pawn centre, fianchettoes the king's bishop, castles, and then strikes back with ...e5 or ...c5, often followed by a kingside attack with ...f5.

Origins

The name "Indian Defence" was attributed to the openings that the Indian player Moheschunder Bannerjee used against John Cochrane in the 1850s, and Savielly Tartakower popularised the term in the early 1920s. Until the mid-1930s the King's Indian was regarded as highly suspect. Three Soviet players, Alexander Konstantinopolsky, Isaac Boleslavsky and David Bronstein, made it respected and popular. It was a favourite of world champions Bobby Fischer and Garry Kasparov, and today Hikaru Nakamura and Teimour Radjabov play it. Its popularity dipped in the early 2000s, when Vladimir Kramnik's play against it led Kasparov to give it up.

The idea

Black deliberately gives up the centre to attack it later: ...d6, ...O-O and then ...e5. In the main lines White closes the centre with d5. Then the board is split in two: White attacks on the queenside with c5 and b4, and Black attacks on the kingside with ...Nd7, ...f5, ...f4 and ...g5. The resulting unbalanced positions give both sides chances to play for a win.

Main lines

• Classical (Orthodox) Variation with Nf3, Be2 and O-O: the main line, including the Aronin-Taimanov 7...Nc6 8.d5 Ne7 and the Bayonet Attack 9.b4, introduced by Viktor Korchnoi in the 1970s.
• Petrosian Variation 7.d5: an early closing of the centre.
• Sämisch Variation 5.f3: White secures e4 and often attacks with g4 and h4.
• Four Pawns Attack 5.f4: the most aggressive method for White, with a massive centre.
• Averbakh Variation Be2 and Bg5, and the Fianchetto Variation with g3, where White's kingside is more solidly defended than in most lines.

Don't confuse it with the King's Indian Attack, which is a similar setup for White.

Strengths and weaknesses

Strengths

• Gives Black real winning chances against 1.d4, which is rare among main-line defences.
• The plans repeat across many lines: after White's d5, Black plays for ...f5 and a kingside attack or for ...b5 on the queenside.
• Strong against players who overextend or play slowly on the queenside.

Weaknesses

• Objectively risky: if Black's attack fails, White's queenside play usually decides.
• Some White setups (Sämisch, Bayonet, Fianchetto) take the fun out of Black's attack.
• Black must know how to defend a cramped position while waiting for counterplay.

Who should play it

The KID is for fighters: players who want to attack, accept risk and like tactical middlegames. It works best against White players who grab space but don't know the specific anti-KID plans. It struggles against strong positional players who close the kingside, or who choose the Fianchetto Variation and deny Black a target. For a more solid dynamic alternative, look at the Grünfeld.

The numbers

On Lichess the KID is balanced below 2200, with White at 47.6–48.9% and Black at 47–48%. Above 2200, White wins 48% and Black 44%. In master games over the board, White wins 35%, Black 22.5% and 43% are drawn.