The Fianchetto, 3...g6 4.e3 Bg7 is a variation of the Rapport-Jobava System, catalogued as ECO D01. The line runs 1. d4 Nf6 2. Nc3 d5 3. Bf4 g6 4. e3 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). Development is level at three minor pieces each. It is Black to move after five moves.
On the Rapport-Jobava System generally: ECO D01. A chess opening with 3 known variations.
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All Rapport-Jobava System variations
The Fianchetto, 3...g6 4.e3 Bg7 goes 1. d4 Nf6 2. Nc3 d5 3. Bf4 g6 4. e3 Bg7 5. Nf3. It is a variation of the Rapport-Jobava System and is catalogued as ECO D01.
The Fianchetto, 3...g6 4.e3 Bg7 is ECO D01. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Rapport-Jobava System.
Stockfish evaluates the position after 1. d4 Nf6 2. Nc3 d5 3. Bf4 g6 4. e3 Bg7 5. Nf3 at +0.03 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). Development is level at three minor pieces each. It is Black to move.