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
1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 ◀ Undo move

♞ You have reached Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation B31 — the catalogued line ends exactly here.

Book continuations win% from 1.5M rated games

3810 catalogued lines in total · openings encyclopedia