King's Indian: 5.Nf3 O-O

Before the first move

The King's Indian Defense is a dynamic, hypermodern opening where Black allows White to build a massive pawn center, only to strike back later. As White, you aim to maintain your space advantage and control the middle. As Black, you'll use your fianchettoed bishop to pressure the long diagonal and prepare a central break.

1. d4White · your move

Move your pawn to d4 to claim immediate control of the center. This move opens lines for your queen and bishop while preventing Black from easily placing a pawn on e5. It is the foundation for many solid and aggressive systems.

1... Nf6Black

Black responds with Nf6, the most popular way to meet d4. This move controls the e4 square and prepares for a kingside fianchetto. While Black could try the Englund Gambit with e5 or the solid Horwitz Defense with e6, the knight move is the most resilient.

Other paths here: Na6 (Australian Defense) · g5 (Borg Defense: Borg Gambit) · b6 (English Defense) · e5 (Englund Gambit)

2. c4White · your move

Push your pawn to c4 to reinforce your control over the d5 square. This move prepares to develop your knight behind the pawn and is a key step in building a powerful central presence that cramps Black's position.

Other paths here: f4 (Canard Opening) · g4 (Indian Defense: Gibbins-Weidenhagen Gambit) · e4 (Indian Defense: Omega Gambit) · d5 (Indian Defense: Pawn Push Variation)

2... g6Black

Black plays g6, signaling the intent to enter a King's Indian structure. By choosing this over the Queen's Indian with b6 or the Mexican Defense with Nc6, Black prepares a very specific, sharp counter-attacking game based on the dark-squared bishop.

Other paths here: g5 (Indian Defense: Medusa Gambit) · b5 (Indian Defense: Pyrenees Gambit) · a6 (Indian: 2.c4 a6) · Nc6 (Mexican Defense)

3. Nc3White · your move

Develop your knight to c3. This move puts more pressure on the d5 square and prepares for the advance of your e-pawn. It is the most natural and aggressive way to continue your development in this setup.

Other paths here: d5 (Indian Defense: Anti-Grünfeld, Advance Variation) · f3 (Indian Defense: Anti-Grünfeld, Alekhine Variation) · h4 (Indian Defense: Anti-Grünfeld, Basman-Williams Attack) · g3 (King's Indian Defense: Fianchetto Variation, Immediate Fianchetto)

3... Bg7Black

Black completes the fianchetto with Bg7. At this point, the game could still branch into a Grunfeld Defense if Black plays d5, but the King's Indian is more common. Black is now ready to castle and begin challenging White's center.

Other paths here: d5 (Grünfeld Defense) · c5 (King's Indian: 3.Nc3 c5) · c6 (King's Indian: 3.Nc3 c6) · d6 (King's Indian: 3.Nc3 d6)

4. e4White · your move

Push your pawn to e4 to complete your ideal central pawn duo. You now have a massive space advantage and control the heart of the board. This move challenges Black to find a way to break your grip.

Other paths here: Bf4 (King's Indian: 4.Bf4) · Bg5 (King's Indian: 4.Bg5) · g3 (King's Indian: 4.g3) · Nf3 (King's Indian: 4.Nf3)

4... d6Black

Black plays d6, a necessary prophylactic move that solidifies the center and restricts White's e-pawn. Without this, White's center could become too mobile. Black is now fully committed to the King's Indian structure.

Other paths here: O-O (King's Indian: 4.e4 O-O)

5. Nf3White · your move

Develop your knight to f3. This is the Classical Variation. You are developing naturally, defending your d4 pawn, and preparing to castle. It is a flexible move that keeps your king safe while maintaining pressure.

Other paths here: Bg5 (King's Indian Defense: Accelerated Averbakh Variation) · Nge2 (King's Indian Defense: Kramer Variation) · Bd3 (King's Indian: 4.e4 d6 5.Bd3) · h3 (King's Indian Defense: Makogonov Variation)

5... O-OBlack

Black castles kingside, finishing the first stage of the opening. Black could also experiment with moves like c5 or Nbd7, but castling is the most principled choice. The stage is now set for the middle-game battle.

Other paths here: Bg4 (King's Indian: 5.Nf3 Bg4) · c5 (King's Indian: 5.Nf3 c5) · Nbd7 (King's Indian: 5.Nf3 Nbd7)

Where you stand

The opening has reached the Classical King's Indian Defense. White has a strong central presence and more space, while Black has a safe king and a powerful dark-squared bishop. The game will likely revolve around White's queenside expansion and Black's typical kingside pawn storm after the central break e5.

• f1-e2 Develop the bishop to prepare castling
• e7-e5 Strike at the center with e5
• c3-b5 Expand on the queenside to gain space
• f6-h5 Move the knight to prepare f5