King's Indian: 4.e4 O-O

Before the first move

The King's Indian Defense is a hypermodern battleground where Black allows White to build a massive center with the goal of tearing it down later. White claims space and control, while Black prepares a counter-strike, often on the kingside. It is an opening of deep strategy and sharp tactical risks for both sides.

1. d4White · your move

Move your pawn to d4 to claim central space and open lines for your queen and dark-squared bishop. This move immediately establishes a presence in the heart of the board and is the foundation for many of the most solid and strategic systems in chess.

1... Nf6Black

Black responds with Nf6, the most flexible and popular reply to d4. By developing the knight, Black controls e4 and d5. While alternatives like the Englund Gambit or the solid Horwitz Defense exist, this move leads into the richest strategic territory of the game.

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. This move increases your grip on the d5-square and prepares to develop your knight behind the pawn. It is a hallmark of the Queen's Gambit and Indian systems, aiming for a broad pawn center that restricts Black's pieces.

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 or Grunfeld structure. By preparing to put the bishop on g7, Black chooses a hypermodern approach. Alternatives like e6 lead to the Nimzo-Indian, while b6 would signal the Queen's Indian Defense.

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 immediate pressure on the d5-square and supports your central pawn on d4. It is the most natural way to develop the queenside and prepares for the eventual push of your e-pawn to e4.

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. The bishop is now beautifully placed on the long diagonal. At this stage, Black could have opted for the Grunfeld Defense with d5, but Bg7 keeps the game firmly in King's Indian territory.

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. You have successfully built the 'Big Center.' With pawns on c4, d4, and e4, you control a massive amount of space and have excellent prospects for an attack. Now you must defend this center against Black's coming counter-attacks.

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... O-OBlack

Black castles, prioritizing king safety before striking back at the center. While d6 is a very common alternative to keep the center flexible, castling is a standard and essential step. The stage is now set for the main theoretical lines of this opening.

Other paths here: d6 (King's Indian Defense: Normal Variation)

Where you stand

White has established a powerful pawn trio in the center and enjoys a significant space advantage. Black is castled and ready to challenge the center with moves like d6 followed by e5 or c5. The game will likely revolve around whether White can use their space to launch a central or queenside attack before Black can generate counterplay on the kingside.

• g1-f3 Develop the knight to support the center
• f8-e8 Position the rook to support central breaks
• f1-e2 Develop the bishop and prepare to castle
• d7-d6 Prepare the e5 or c5 central strike
• e1-g1 Secure the king behind the pawn wall