Queen's Gambit Declined: Orthodox Defense

An entry in the Encyclopedia of Chess Openings (ECO D60), reached after 12 half-moves: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7.

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Continue from this position

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7.Rc1 11 lines
7.Qc2 2 lines
- D61 Rubinstein Variation +1
7.Bd3 1 line
- D60 Botvinnik Variation
7.Qb3 1 line
- D60 Rauzer Variation

About this opening

Queen's Gambit Declined: Orthodox Defense is an opening in the Encyclopedia of Chess Openings, classified under code D60. 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 12 half-moves from the starting position, with the move sequence 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7.

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

The opening sequence in prose form: 1.d4 Nf6, 2.c4 e6, 3.Nf3 d5, 4.Nc3 Be7, 5.Bg5 O-O, 6.e3 Nbd7. From this position 4 named continuations are recorded in the encyclopaedia, each leading to a distinct theoretical line.