Opening explorer
Walk any move order through the catalog: pick a book continuation and watch the board, or open the matching ECO lines on the side. Move orders, not transpositions — exactly the paths over the board. Prefer the family trees? Every opening page has one.
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5
◀ Undo move
♞ You have reached Queen's Gambit Declined: Traditional Variation D30 — the catalogued line ends exactly here.
Matching openings 3
- Queen's Gambit Declined: Capablanca Variation D30 1 ply deeper
- Queen's Gambit Declined: Vienna Variation D30 1 ply deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia