Grunfeld structure
A structure where White builds a big pawn center on c3, d4 and e4 while Black attacks it with pieces and the pawn break ...c5, relying on the bishop on g7 and quick counterplay.
Black allows White to occupy the center with pawns, then undermines it. After ...d5 and the exchanges on d5 and c3, White gets a broad center and a half-open b-file, while Black gets active pieces and the long diagonal for the bishop on g7.
Black's tools are the c5 break, a queen on a5, a rook on c8, and pressure on d4. The bishop on g7 eyes the pawn on d4 and the rook on a1, so any weakness around d4 is serious. Black often plays ...Nc6 and ...Bg4 to add pressure.
White's plan is to keep the center safe, develop the pieces smoothly, and use the space to attack. Typical moves are Be3, Rb1, Qd2 and a kingside attack with h4-h5. If Black's pressure fails, White's center turns into a strong attacking force.
Common errors are for White to allow ...c5 and ...Qa5 without a response and for Black to trade the bishop on g7 too early. Practical tip: against the Grunfeld's big center, count how many attackers Black has on d4 versus how many defenders White has before deciding between a quiet plan and a sharp plan.
A neighboring idea is London system setup. The London system setup is a White plan that brings the dark-squared bishop to f4 before e3 can shut it in, then builds a sturdy triangle of pawns on c3, d4 and e3 that suits nearly any Black reply.
Compare it with Symmetrical position. A symmetrical position is one where both sides have the same pawn structure and similar piece placement, so the fight depends on tempo, activity and who first creates a concrete imbalance.
Whether "Grunfeld structure" suits your repertoire depends on the games you play. A first lesson with George Li maps what you play today and what to build next.
Related terms
A strong center is a set of pawns and pieces holding the central squares, usually d4, e4, d5 and e5, so your own pieces gain room and influence while the opponent is cramped.
A pawn center is a group of one or more pawns, most often on d4 and e4 or d5 and e5, that occupies the central squares and takes space from the opponent.
A space advantage means controlling more squares, usually through advanced pawns, so that your pieces have room to maneuver while the opponent has little room and finds it hard to exchange or regroup.
Counterplay is active play that a player in a worse or defensive position creates, such as a threat, a pawn break or an attack elsewhere, to distract the opponent from their plan and restore balance.
A pawn break is a pawn move that makes contact with an enemy pawn or chain, forcing an exchange that changes the structure and gives your pieces new files or diagonals to use.
Dynamic play is a style of handling a position that prizes activity, initiative and fast-changing threats over lasting structural features, accepting concessions such as weaknesses or material in return for time and attacking chances.
Guides that go further
Most popular chess openings and win rates
The most played openings, how often White wins, and how the numbers change with rating, computed from public games.
What to decide first, the questions to ask, what a first lesson should show and the red flags to avoid.
A game review, a read on your level and a written study plan from George Li.
Want to spot this in your own games?
A first lesson starts with your games: George reviews them and builds a study plan around what he finds.