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 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 dxc4
◀ Undo move
♞ You have reached Queen's Gambit Declined: Three Knights, Vienna Variation D37 — the catalogued line ends exactly here.
Book continuations win% from 1.5M rated games
Matching openings 6
- Queen's Gambit Accepted D24 1 ply deeper
- Queen's Gambit Accepted D24 1 ply deeper
- Queen's Gambit Declined: Vienna Variation, Quiet Variation D37 1 ply deeper
- Queen's Gambit Declined D53 2 plies deeper
- Queen's Gambit Declined D53 3 plies deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia