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. By default move orders are strict — flip the toggle to group by position and pull in transpositions.
⚖ Grouping by position
Grouping by position: lines that reach this position by a different move order are included too.
1. d4 e6 2. c4 Nf6 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 4
- Queen's Gambit Declined: Capablanca Variation D30 1 ply deeper
- Queen's Gambit Declined: Vienna Variation D30 1 ply deeper
- Queen's Gambit Declined: Capablanca Variation D30 4 plies deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia