Grünfeld Defense: Three Knights Variation: what to play after Nf3?

In the Grünfeld Defense: Three Knights Variation (ECO D90), Black's overwhelming standard response is Bg7. Occurring in 95.2% of recorded games, this move completes the kingside fianchetto, readies the king for castling, and directly pressures White's central pawn formation. The move maintains Black's dynamic counterplay while keeping the position nearly balanced at an engine evaluation of +0.22.

Theoretical Role of Bg7

Developing the dark-squared bishop via Bg7 represents the core strategic philosophy of the Grünfeld Defense. Rather than maintaining a rigid pawn presence on d5, Black welcomes White establishing central space, intending to challenge it with pieces and subsequent pawn breaks. Out of 2,789,869 recorded positions, Bg7 has been chosen 2.65M times, with White scoring 50.7% from this juncture. An illustrative continuation demonstrating the tension in the center runs Bg7 Qb3 dxc4 Qxc4 O-O e4.

Alternative Black Responses

All other moves appear far less frequently and concede higher engine evaluations to White. The solid c6 is seen in 3.7% of games (104K recorded), where White scores 53.7% against an evaluation of +0.44; a sample engine path is c6 h3 Ne4 e3 Bg7 Bd3. Transposing toward Queen's Gambit Declined or Catalan setups with e6 accounts for 1.0% of games (27K recorded) with an evaluation of +0.68, as shown in e6 Bf4 Bg7 e3 O-O Rc1. Rare flank attempts such as a6 (0.2% of games, +0.89 eval) and h6 (+1.09 eval) offer White broader strategic control over the center without accelerating Black's kingside development.