The with g3 is a variation of the Neo-Grünfeld Defense, catalogued as ECO D73. The line runs 1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3, reaching the position shown below after 9 half-moves.
Both sides have pawns in the centre (White on d4, Black on d5), and one pawn capture is available, so the structure has not settled yet. Development is level at two minor pieces each. It is Black to move after five moves.
On the Neo-Grünfeld Defense generally: ECO D70. A chess opening with 13 known variations.
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See all 13 Neo-Grünfeld Defense variations →
The with g3 goes 1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3. It is a variation of the Neo-Grünfeld Defense and is catalogued as ECO D73.
The with g3 is ECO D73. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Neo-Grünfeld Defense.
Stockfish evaluates the position after 1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 at +0.24 at depth 18, which is balanced. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
Both sides have pawns in the centre (White on d4, Black on d5), and one pawn capture is available, so the structure has not settled yet. Development is level at two minor pieces each. It is Black to move.