The most aggressive Black defense to 1.d4. Let White build a big center, then attack it. Fischer's weapon, Kasparov's weapon, and the opening that produces some of the wildest attacking chess in the game.
For: BlackLevel: Intermediate to eliteType: Indian defense (hypermodern)Popularized: Hypermodern school, 1920s
The hypermodern idea
Classical chess theory says: occupy the center with pawns. The hypermodern school, developed in the 1920s by Réti, Nimzowitsch, and Breyer, said something radical: let your opponent build the center, then attack it.
The King's Indian is the purest expression of this idea. Black voluntarily gives White a huge pawn center on c4, d4, and e4 — and plans to undermine it. Black's bishop on g7 stares at the long diagonal. Knights pressure the center from f6 and (later) c6 or d7. A well-timed ...e5 or ...c5 pawn break challenges White's position.
The resulting positions are violent. White attacks on the queenside; Black attacks on the kingside. Whoever crashes through first wins. The King's Indian is responsible for some of the most spectacular chess games of all time.
The standard King's Indian setup
Black's first six moves are remarkably consistent regardless of White's response:
...Nf6 — controls e4 from the start
...g6 — preparing the fianchetto
...Bg7 — the King's Indian bishop, aimed at the long diagonal
...d6 — supports e5 push and develops the queen's bishop's diagonal
...O-O — castle kingside
...e5 (or ...Nbd7, ...c5 depending on the line) — challenge the center
The most popular main line. White develops naturally and Black plays the typical ...e5 break. The position usually closes after 7.d5 (the Mar del Plata variation), and both sides launch attacks: White on the queenside with c5 and b4-b5; Black on the kingside with ...f5, ...f4, ...g5, ...g4.
The Mar del Plata variation is one of the sharpest in all of chess theory. Kasparov produced some of his greatest attacking games here.
2. Sämisch Variation (5.f3)
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3
White plays the prophylactic f3, defending e4 and preparing g4 to attack the kingside. The Sämisch is a positional system that aims to take away Black's typical kingside attack before it starts.
Black usually responds with ...e5 or ...c5, leading to complex maneuvering battles. Less tactical than the Classical but theoretically just as deep.
White fianchettos the king's bishop, creating a symmetrical bishop battle. The position is the most positional King's Indian line — both sides have well-placed bishops and the center stays fluid.
Less dangerous for Black than the Classical or Sämisch but harder to win as Black because the position is so balanced.
4. Four Pawns Attack (5.f4)
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4
White builds an enormous center with pawns on c4, d4, e4, and f4. Looks crushing but Black has resources: ...c5 to challenge the d4 pawn, or ...e5 to break up the center.
Beautiful demonstration of the hypermodern principle: White's center looks impressive but is actually a target.
White pins the f6 knight with Bg5, restricting Black's typical setup. The Averbakh is positional and slightly drawish but takes away Black's most natural ...e5 break.
The Mar del Plata: King's Indian's signature game
The most famous King's Indian position arises after 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. The center is locked. White's plan is clear: push c5, open the queenside, attack the Black king from a distance. Black's plan is equally clear: push ...f5, then ...f4 to start a kingside pawn storm, then ...g5-...g4 to open lines toward White's king.
The race is on. Both sides charge toward the other king. The first to crash through usually wins — and the games are some of the most exciting in chess literature.
The "engine problem"
Modern chess engines have changed the evaluation of many King's Indian lines. The conclusion: with precise play, White gets a small but persistent edge in most main lines. This has pushed many top players away from the King's Indian in classical games.
However, at any level below grandmaster, the King's Indian is still a fearsome practical weapon. The attacking chances are real. The positions are hard to defend without long calculation. In rapid and blitz, it scores especially well for Black.
Famous King's Indian players
Bobby Fischer — used the King's Indian as a main weapon in the 1960s. His Mar del Plata games are required reading.
Garry Kasparov — championed the King's Indian for decades, producing some of his most famous attacking games with it.
Mikhail Tal — "The Magician from Riga" loved the King's Indian's tactical chaos.
Hikaru Nakamura, Teimour Radjabov — modern champions of the King's Indian.
Sample plan as Black
Play 1...Nf6 against 1.d4.
Follow up with 2...g6 against 2.c4.
Develop the bishop to g7 (3...Bg7).
Play 4...d6 to support an eventual ...e5.
Castle kingside (5...O-O).
Push ...e5 to challenge the center.
If White closes with d5, prepare ...f5 and the kingside pawn storm.
If White keeps the position open, look for active piece play and ...c5 or ...c6 breaks.
Common mistakes
Passive play. The King's Indian punishes Black who doesn't attack. If you don't push ...f5 and create kingside threats, White's queenside attack wins.
Trading the dark-squared bishop. The g7 bishop is the soul of the King's Indian. Don't trade it for a knight without serious compensation.
Misjudging the race. In Mar del Plata positions, calculating who attacks faster is everything. Wasted tempi are fatal.
Trying to play it like a beginner. The King's Indian rewards understanding of hypermodern principles. Without that understanding, you'll just hand White a winning position.
How to play against the King's Indian (as White)
Classical (5.Nf3, 6.Be2) — most popular. Sharp Mar del Plata battles.
Fianchetto (5.g3) — quietest line. Best for positional players.
Anti-King's Indian via 3.f3 (some early ...d6) — modern lines that avoid the main King's Indian setups.
Common questions about this opening
What is the King's Indian Defense?
A hypermodern Black response to 1.d4: 1...Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 (followed by ...O-O). Black lets White build a center, then attacks it with pieces and pawn breaks.
Is the King's Indian good for beginners?
Not as a first opening. The hypermodern concept of allowing the opponent a big center is counterintuitive. Beginners often play it passively and lose horribly. Better to learn classical defenses first.
Why is the King's Indian considered "questionable" by engines?
Engine analysis suggests White gets a small persistent edge in most main lines with precise play. This has reduced King's Indian usage at the very top level — but it remains a dangerous practical weapon at every other level.
What's the difference between the King's Indian and the Queen's Gambit?
The Queen's Gambit Declined plays 2...e6 and 3...d5, contesting the center directly. The King's Indian plays 2...g6 instead, letting White have the center and counter-attacking later. Completely different strategic approaches.
Practice the King's Indian
Play on the browser board and play through the standard King's Indian setup (1...Nf6, 2...g6, 3...Bg7, 4...d6, 5...O-O, 6...e5). See how the position takes shape. Note how easy it is to play the first six moves without thinking — the King's Indian's structure is its key advantage.
