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. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 ◀ Undo move

♞ You have reached Slav Defense: Alapin Variation D16 — the catalogued line ends exactly here.

Book continuations win% from 1.5M rated games

3810 catalogued lines in total · openings encyclopedia