Grünfeld Defense: Stockholm Variation: what should Black play?

In the Stockholm Variation of the Grünfeld Defense, Black faces an immediate decision regarding the development of the kingside and the defense of the loose pawn on c4. While the engine narrowly favors the probing h6 with an evaluation of +0.30, the standard human choice by an overwhelming margin is the natural fianchetto Bg7. Both setups offer distinct ways to challenge White's central ambitions while developing piece activity.

The Main Practical Choice: Bg7

By far the most common path is Bg7, occurring in 95.1% of games (71K recorded). Black prioritizes basic development along the long diagonal and prepares king safety. In this line, White scores 55.9% points with an engine assessment of +0.40. An illustrative continuation runs Bg7 e4 h6 Be3 c5 Bxc4, where Black strikes back against the white center with the typical c-pawn lever after driving White's dark-squared bishop away.

Engine Preferences: Probing with h6

The engine's top choice, h6, appears in only 0.8% of games (571 recorded) and evaluates to +0.30, where White scores 57.9% points. By asking White's bishop on g5 about its intentions immediately, Black often accepts a slight concession in pawn structure in exchange for the bishop pair. This is shown in the line h6 Bxf6 exf6 e3 Be7 Bxc4, leading to an asymmetrical structure where Black retains the two bishops to offset White's central control.

Minor Alternatives: a6 and c6

Other less frequent tries include a6 and c6, each played in 1.9% of recorded games (1.4K recorded each). The move a6 carries an engine evaluation of +0.30 and aims to secure queenside space via a6 e3 b5 a4 b4 Na2. Meanwhile, c6 assesses at +0.33, where the continuation c6 a4 h6 Bf4 Bg7 e4 transposes into solid, traditional setups. Black can also consider Be6, an option chosen in 269 games.