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 g6 2. d4 Bg7 3. Nc3 ◀ Undo move

♞ You have reached Modern Defense: Standard Line B06 — the catalogued line ends exactly here.

Book continuations win% from 1.5M rated games

Matching openings 17

…and 5 more lines run through this position — keep making moves to narrow it down.

3810 catalogued lines in total · openings encyclopedia