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.

♜♞♝♛♚♜♟♟♟♝♟♟♟♟♞♟♝♟♟♞♟♟♟♟♟♟♜♛♚♝♞♜a8b7c6d5e4f3g2h1
⚖ Grouping by position Grouping by position: lines that reach this position by a different move order are included too.
1. e4 e6 2. Nc3 d5 3. d4 Nf6 4. Bg5 Be7 ◀ Undo move

♞ You have reached French Defense: Classical Variation, Normal Variation C13 — the catalogued line ends exactly here.

Book continuations win% from 1.5M rated games

3810 catalogued lines in total · openings encyclopedia