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Indian DefenceECO E92-E99A defence for Black · advanced · common

King's Indian Defence: Classical Variation

Also known as Classical KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5

The Classical is the main highway of the King's Indian. White builds a broad pawn centre and rolls forward on the queenside, while Black locks the centre and launches a kingside pawn storm with ...f5, ...f4 and ...g5. Both sides race to attack on opposite wings.

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Starting position

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What it does

Black lets White build an imposing d4-e4 centre, then strikes it with 6...e5. After 7.O-O Nc6 8.d5 Ne7, White usually closes the centre, which fixes the pawn structure and hands each side a clear plan. White expands on the queenside with c5 and b4, aiming to break through on that flank. Black ignores the queenside and throws the kingside pawns forward - ...f5, often ...f4 and ...g5 - to crash into White's king. It becomes a thrilling race where tempo and accuracy matter more than material.

When to use it

Reach for the Classical when you want a fighting, double-edged game with Black against 1.d4 and you enjoy attacking the enemy king. It rewards players who like sharp, plan-driven positions over quiet manoeuvring, and who are happy to give White space in return for a furious kingside initiative. It is demanding theory, so it suits players ready to study typical pawn breaks and attacking patterns rather than total beginners.

Why it works

By conceding the centre and then locking it, Black turns the position into a pawn-storm race - and Black's storm aims straight at White's castled king, which is often the more dangerous target. The closed centre means central counterplay is off the table, so the game is decided on the wings. Black's dark-squared bishop and rerouted knights support the ...f5 break, while the queenside is far from Black's king, giving Black a head start in the attack that matters most.

Key ideas

  • Lock the centre with ...e5 met by d5, then attack the wings
  • Play ...f5 as the key break to open lines at White's king
  • Follow up with ...f4, ...g5 and ...g4 to storm the kingside
  • Reroute knights (Ne7, Nd7) to clear the f-pawn and join the attack
  • Accept White's queenside space; speed of attack is your trump
  • The dark-squared bishop on g7 is your prized long-term asset

Watch out

The biggest danger is being too slow: if Black dawdles, White's c5-b4-b5 break crashes through on the queenside before the kingside storm arrives. Black must also avoid opening the centre carelessly, as a premature ...exd4 or a rushed ...f5 can simply lose a pawn or hand White the key squares.

Where it can go

Bayonet Attack (9.b4)Mar del Plata main line (9.Ne1 with ...Nd7 and ...f5)Petrosian System (7.d5)Gligoric System (7.Be3)