ECO D63 · Queen's Gambit Declined
Queen's Gambit Declined: Orthodox Defense, Main Line
The position after 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 O-O 6.e3 Nbd7 7.Rc1.
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1
Queen's Gambit Declined: Orthodox Defense, Main Line is filed under ECO D63, a variation of Queen's Gambit Declined: Orthodox Defense. It is the position after 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 O-O 6.e3 Nbd7 7.Rc1 — 13 half-moves in, with Black to move. From here theory names one continuation, a6.