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. e4 e5 2. d4 exd4 3. Nf3 Bc5 4. c3
◀ Undo move
♞ You have reached Center Game: Lanc-Arnold Gambit C21 — the catalogued line ends exactly here.
Book continuations win% from 1.5M rated games
Matching openings 2
- Center Game: Lanc-Arnold Gambit, Schippler Gambit C21 2 plies deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia