Chess Openings Lab
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King's Indian Defense: Fianchetto Variation

The Fianchetto Variation starts with 3.Nf3 Bg7 4.g3, where White mirrors Black by putting the light bishop on g2. White wants a safe king and long-term pressure on the a8-h1 diagonal, while Black can go for ...d6 and ...e5, or switch to ...c6 and ...d5 lines.

Moves
1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3
ECO
E60
Engine
+0.15 · level (Stockfish 17.1, depth 20)
Played
2,763 games in our lichess sample
White scores
52.2%

Key ideas for both sides

White

  • Continue with Bg2 and O-O; the g2 bishop guards the king and eyes d5 and b7.
  • Answer ...c6 and ...d5 with Qb3, as both top engine lines show, hitting b7 and d5.
  • If Black plays ...d5 at once, cxd5 and e4 gain a big center with tempo on the knight.
  • Delay e4 until Nc3 is in, so the center pawns stand on solid support.

Black

  • Castle short and choose a setup: ...d6 with ...Nbd7 and ...e5, or ...c6 and ...d5.
  • Against Qb3, play ...Qb6 or ...a5, as the engine shows, to blunt the queen's attack on b7.
  • A quick ...d5 invites cxd5 and e4; then ...Nb6 and ...O-O hit the center from the sides.
  • The ...c5 setup is another option, aiming for Benoni play against a slower White plan.

Plans and pawn structure

Both kings stay very safe, so the game becomes positional. White's g2 bishop and c4 pawn press on d5 and the queenside, and Qb3 is a common way to target b7. Black can build the classical ...d6 and ...e5 center or play ...c6 and ...d5 for a Grünfeld-like structure. Pawn breaks like ...c6, ...d5 or e4 decide the play, and accurate move order matters more than attacking ideas.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +0.15: level. Its three top choices for Black:

  1. +0.15 4...c6 5.Nc3 d5 6.Qb3 a5 7.cxd5
  2. +0.17 4...O-O 5.Bg2 c6 6.Qb3 d5 7.Nc3
  3. +0.26 4...d5 5.cxd5 Nxd5 6.e4 Nb6 7.Nc3

Pawns, from White's side.

How it scores on lichess

2,763 rated lichess games reached this position; White scored 52.2%.

1200–159951.4%
1600–199954.8%
2000 and up50.5%

Light: White wins. Grey: draws. Dark: Black wins. About the sample.

Where it goes next

  • Classical Variation, Original Defense4...O-O · 694 games
  • Fianchetto Variation, Pterodactyl Variation4...c5 · rare
  • Fianchetto Variation, Double Fianchetto Attack4...d6 · rare
  • Fianchetto Variation, Panno Variation, Donner Line4...O-O · rare

How to play against it

As Black, castle and pick one setup instead of mixing them. If White aims Qb3 at b7, ...Qb6 or ...a5 are clean answers. As White, keep Bg2 and O-O first, then add Nc3 before pushing e4. Do not let Black win d4 with ...c5 while your king is still uncastled.

Questions

What are the moves of the King's Indian Defense: Fianchetto Variation?

The King's Indian Defense: Fianchetto Variation starts 1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3. Its ECO code is E60.

Is the King's Indian Defense: Fianchetto Variation good for White?

Stockfish 17.1 rates the position +0.15 at depth 20, which is level. In 2,763 lichess games from our sample, White scored 52.2%. A favorite of positional White players who like slow maneuvering, and it asks Black to know which setup to use against the g2 bishop.

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

White meets Black's kingside fianchetto with one of its own, giving a safe king and pressure on the long diagonal. Black chooses between a classical ...d6 and ...e5 center and a ...c6 and ...d5 setup.

What should Black play next?

The engine's first choice is c6, with O-O and d5 close behind. ...c6 prepares ...d5 with solid support and gives the queen a path to b6 if White plays Qb3.

Updated October 2026. Sources and method.