Also known as 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 Nd7, Orthodox Defense of the Queen’s Gambit Declined, Orthodox Defense
chess opening, variation from Queen's Gambit Declined
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).