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. Move orders, not transpositions — exactly the paths over the board. Prefer the family trees? Every opening page has one.

1. e4 e5 2. d4 exd4 3. c3 dxc3 ◀ Undo move

♞ You have reached Danish Gambit Accepted C21 — the catalogued line ends exactly here.

Book continuations

Bc4 4

Matching openings 5

Danish Gambit Accepted: Chigorin Defense C21 4 plies deeper
Danish Gambit Accepted: Classical Defense C21 4 plies deeper
Danish Gambit Accepted: Copenhagen Defense C21 4 plies deeper
Danish Gambit Accepted: Schlechter Defense C21 4 plies deeper

…and 1 more lines run through this position — keep making moves to narrow it down.

3810 catalogued lines in total · openings encyclopedia