Queen's Gambit Declined: Neo-Orthodox Variation

An entry in the Encyclopedia of Chess Openings (ECO D54), reached after 11 half-moves: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Rc1.

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6…O-O 1 line
- D55 Main Line

About this opening

Queen's Gambit Declined: Neo-Orthodox Variation is an opening in the Encyclopedia of Chess Openings, classified under code D54. 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 11 half-moves from the starting position, with the move sequence 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Rc1.

It belongs to the Queen's Gambit Declined family. Within that family this is a sub-variation (the Neo-Orthodox Variation line).

The opening sequence in prose form: 1.d4 Nf6, 2.c4 e6, 3.Nc3 d5, 4.Bg5 Be7, 5.e3 O-O, 6.Rc1. From this position exactly one named continuation is recorded in the encyclopaedia.