About this opening
Queen's Gambit Declined: Orthodox Defense, Rauzer Variation 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 13 half-moves from the
starting position, with the move sequence 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qb3.
It belongs to the Queen's Gambit Declined family.
Within that family this is a level-2 branch (the Orthodox Defense → Rauzer Variation line). The immediate parent line is Queen's Gambit Declined: Orthodox Defense, transitioned via 7.Qb3.
The opening sequence in prose form: 1.d4 d5, 2.Nf3 Nf6, 3.c4 e6, 4.Nc3 Be7, 5.Bg5 O-O, 6.e3 Nbd7. From this position the encyclopaedia records no further canonical continuations — practical play branches into unnamed transpositions or returns to the parent line for alternative ideas.