Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation

An entry in the Encyclopedia of Chess Openings (ECO D09), reached after 9 half-moves: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3.

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5…Be6 1 line
- D09 Be6 Line
5…Bf5 1 line
- D09 Bf5 Line
5…Bg4 1 line
- D09 Bg4 Line

About this opening

Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation is an opening in the Encyclopedia of Chess Openings, classified under code D09. ECO group D (D00–D99) covers closed games and semi-closed games beginning 1.d4 d5, covering the Queen's Gambit, Slav, Grünfeld and related queen-pawn structures. This particular variation is reached after 9 half-moves from the starting position, with the move sequence 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3.

It belongs to the Queen's Gambit Declined family. Within that family this is a level-2 branch (the Albin Countergambit → Fianchetto Variation line). The immediate parent line is Queen's Gambit Declined: Albin Countergambit, transitioned via 5.g3.

The opening sequence in prose form: 1.d4 d5, 2.c4 e5, 3.dxe5 d4, 4.Nf3 Nc6, 5.g3. From this position 3 named continuations are recorded in the encyclopaedia, each leading to a distinct theoretical line.