ECO D30 · Queen's Gambit Declined
Queen's Gambit Declined: Traditional Variation
The position after 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Bg5.
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5
Queen's Gambit Declined: Traditional Variation is filed under ECO D30, a variation of Queen's Gambit Declined. It is the position after 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Bg5 — 7 half-moves in, with Black to move. From here theory names 2 continuations: Bb4+, h6.