King's Indian Defense

1.d4 Nf6 2.c4 g6 3.Nc3

The King's Indian Defense is a chess opening reached after 1.d4 Nf6 2.c4 g6 3.Nc3, catalogued under code E61 in the Encyclopaedia of Chess Openings (ECO).

The defining move Nc3 is chosen by White on move 3.

22 named continuations branch from this position, including the Fianchetto Variation and the Santasiere Variation.

What is the King's Indian Defense?

The King's Indian Defense is a chess opening that begins 1.d4 Nf6 2.c4 g6, with Black fianchettoing the bishop to g7 and castling before challenging the center with ...e5 or ...c5. Black deliberately lets White build a big pawn center and then attacks it, or plays around it, with pieces and pawn breaks. It is the most ambitious of the Indian defenses and one of the most double-edged openings in chess.

Its character is the counterattack. In the main lines White closes the center with d5 and expands on the queenside; Black answers with the pawn storm ...f5, ...f4, ...g5 and ...g4 against the white king. Both sides attack on opposite wings and the game is decided by who arrives first. That is why the King's Indian was the weapon of Bronstein, Tal, Fischer and Kasparov, and why it remains the choice of players who want to win with Black against 1.d4 whatever the cost.

How to reach the King's Indian Defense

The King's Indian arises after 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6, or by many transpositions such as 1.d4 g6 or 1.c4 Nf6 2.Nc3 g6. White's fifth move defines the system: 5.Nf3 with Be2 is the Classical, 5.f3 the Sämisch, 5.f4 the Four Pawns Attack, 5.Be2 with Bg5 the Averbakh, and 3.Nf3 with g3 and Bg2 the Fianchetto Variation. Black almost always castles by move five and chooses between ...e5, the main break, and ...c5, which can transpose to Benoni structures.

Pros and cons of the King's Indian Defense

Pros

The most reliable way to play for a win against 1.d4: unbalanced from the start and rich in attacking chances.
The g7-bishop and the ...e5 or ...c5 breaks give Black active counterplay against any white setup.
The plans are thematic and repeat across systems: kingside pawn storm, ...f5, knight to f4, the exchange sacrifice on f3.
Suits players who understand attacking chess and dislike the passive defense of the Queen's Gambit Declined.

Cons

White gets space and a free hand in the center; if the counterattack fails, Black's position is simply worse.
The Bayonet Attack in the Classical and the Sämisch demand exact knowledge; a slow move can lose by force.
The Exchange Variation with dxe5 steers into a drawish endgame many King's Indian players dislike.
The Fianchetto systems neutralize the g7-bishop and give White a lasting positional edge.

Main variations of the King's Indian Defense

King's Indian Defense: Classical Variation, Mar del Plata (9.Ne1)

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Ne1 Nd7 10.Be3 f5

The most famous King's Indian position. White closes the center with d5 and prepares c5 and the queenside attack; Black reroutes the knights and launches ...f5, ...f4 and ...g5 against the white king. Named after the 1953 Najdorf-Gligorić game, it is the model of opposite-wing attacks. The modern 9.b4, the Bayonet Attack, is White's sharpest attempt to win the race.

King's Indian Defense: Sämisch Variation (5.f3)

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5 Nh5 8.Qd2 f5

White supports e4 with the f-pawn, plans Be3, Qd2 and long castling, and attacks with g4 and h4. It is the most direct and most respected anti-King's Indian system. Black chooses between the main-line ...e5 and ...Nh5 with ...f5 shown here, the ...c5 pawn sacrifice, and the Panno setup with ...Nc6 and ...a6. Both kings come under fire and the games are rarely quiet.

King's Indian Defense: Four Pawns Attack (5.f4)

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Nf3 c5 7.d5 e6 8.Be2 exd5 9.cxd5

White's most aggressive setup: four pawns abreast in the center. Black must strike immediately with ...c5 and ...e6, reaching a Benoni-like structure where White's center is huge but overextended. The play is sharp and concrete, and a King's Indian player who knows the ...e6 break and the ...Re8 and ...b5 counterplay has nothing to fear.

King's Indian Defense: Fianchetto Variation (g3)

1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 d6 6.O-O Nbd7 7.Nc3 e5 8.e4 c6

White meets fianchetto with fianchetto. The g2-bishop shields the king, so Black's pawn storm loses its target, and the game becomes a slower positional fight. Black plays ...Nbd7, ...e5 and ...c6 for a solid center, or the Panno ...Nc6 and ...a6 with ...Rb8 and ...b5 for queenside play. It is the system that Karpov and Kramnik used to take the fun out of the King's Indian.

King's Indian Defense: Averbakh Variation (5.Be2 O-O 6.Bg5)

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 c5 7.d5 e6 8.Qd2 exd5 9.exd5

The pin on the f6-knight discourages ...e5, because after Bg5 the e5-push hangs the d6-pawn in some lines, so Black usually switches to ...c5 and a Benoni structure. White keeps a space advantage and the bishop pair; Black gets the ...e6 break and play on the e-file. A flexible, well-respected system that avoids the heaviest theory.

King's Indian Defense: Petrosian System (7.d5)

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 a5 8.Bg5 h6 9.Bh4 Na6

White closes the center at once and pins the f6-knight, so that Black's ...f5 break is delayed and the kingside attack slows down. Petrosian used it to take the sting out of the King's Indian; Black answers with ...a5, ...Na6 and ...Qe8 to prepare ...Nh7 and ...f5 anyway, or with the ...h6 and ...g5 expansion. A strategic, maneuvering line for players who prefer prophylaxis to a race.

How to play against the King's Indian Defense

White has two philosophies. The first is to accept the race and win it: the Classical with the Bayonet Attack 9.b4, or the Sämisch with long castling and a pawn storm, both of which give White the faster attack if the theory is known. The second is to deny the race: the Fianchetto Variation neutralizes the g7-bishop and turns the game positional, the Petrosian System pins the f6-knight and delays ...f5, and the Exchange Variation, dxe5 followed by a queen trade, heads for a slightly better endgame that King's Indian players hate. For club players the Fianchetto and the Exchange are the most practical, because they punish the King's Indian player's desire for chaos. Whatever the system, keep the queenside attack moving with c5 and b4-b5, and never let a black knight settle on f4 for free.

Plans for both sides

White's plan

Use the space advantage: close the center with d5 when ...e5 arrives, then attack on the queenside with c5, b4-b5 and the c-file, or in the Sämisch castle long and storm the kingside first. Keep the light-squared bishop on the f1-a6 diagonal to defend the king, meet ...f5 with exf5 or f3 depending on the system, and exchange the g7-bishop whenever the chance arises.

Black's plan

Castle, play ...e5 or ...c5, and when the center closes, start the kingside storm with ...f5, ...f4, ...g5 and ...g4, bringing the knights to f6, g6 and h5. Time the ...f5 break so the knight reaches f4 before White's queenside play breaks through, and be ready for the exchange sacrifice on f3 or the ...Bh6 and ...Bxe3 trade to speed the attack. In the Fianchetto lines switch to queenside play with ...a6 and ...b5.

History of the King's Indian Defense

The King's Indian was known in the nineteenth century but dismissed as an eccentricity until the Soviet hypermoderns of the 1930s and 1940s, above all Bronstein, Boleslavsky and Geller, showed that Black could let White build the center and then destroy it. Fischer used it throughout his career, Kasparov made it his main weapon against 1.d4 in the 1980s and 1990s, and the Mar del Plata race with opposite-wing attacks became the emblem of the opening. Kramnik's Fianchetto and Bayonet lines pushed Kasparov to abandon it in 1997, but Radjabov, Nakamura and Ding brought it back, and it remains the choice of players who want the most fighting chess Black can get.

King's Indian Defense FAQ

Is the King's Indian Defense a good opening?

Yes. It is fully sound and one of the best ways to play for a win with Black against 1.d4, used by Fischer, Kasparov and Nakamura. It is demanding: Black must know the plans and accept that a failed counterattack leaves a worse position.

How do you beat the King's Indian Defense?

Either win the race in the Classical or Sämisch with a faster queenside or kingside attack, or deny the race with the Fianchetto Variation, the Petrosian System or the Exchange Variation, which lead to positional play the King's Indian player dislikes.

Is the King's Indian good for beginners?

It is better for intermediate players. The setup is easy to learn, but the middlegame requires attacking judgment, and beginners are often crushed in the center before their counterplay arrives. The plans are worth learning early because they teach attacking chess.

What is the main idea of the King's Indian Defense?

Black lets White occupy the center, castles early behind the g7-bishop, then attacks the center with ...e5 or ...c5 and, once it closes, storms the kingside with the f-, g- and h-pawns while White plays on the queenside.

King's Indian or Caro-Kann: which is better?

They answer different first moves. The King's Indian is a defense to 1.d4, the Caro-Kann to 1.e4, so a full repertoire needs one of each. In character they are opposites: the King's Indian is a counterattacking race, the Caro-Kann a solid, positional defense.

Named variations

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