The Closed Variation, Rabinovich Variation is a variation of the Catalan Opening, catalogued as ECO E09. The line runs 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qc2 e6 5. Nbd2 Be7 6. g3 Nbd7 7. Bg2 O-O 8. O-O b5, reaching the position shown below after 16 half-moves.
Both sides have pawns in the centre (White on d4, Black on d5), and two pawn captures are available, so the structure is still fluid. Development is level at three minor pieces each. It is White to move after eight moves. Both kings have castled kingside, so play tends to shift to the centre and the opposite flank.
On the Catalan Opening generally: A sophisticated system combining Queen's Gambit ideas with a fianchettoed king's bishop.
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The Closed Variation, Rabinovich Variation goes 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qc2 e6 5. Nbd2 Be7 6. g3 Nbd7 7. Bg2 O-O 8. O-O b5. It is a variation of the Catalan Opening and is catalogued as ECO E09.
The Closed Variation, Rabinovich Variation is ECO E09. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Catalan Opening.
Stockfish evaluates the position after 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qc2 e6 5. Nbd2 Be7 6. g3 Nbd7 7. Bg2 O-O 8. O-O b5 at +0.90 at depth 18, which is a small but real edge for White. 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 two pawn captures are available, so the structure is still fluid. Development is level at three minor pieces each. It is White to move. Both kings have castled kingside, so play tends to shift to the centre and the opposite flank.