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. d4 d6 2. c4 ◀ Undo move

♞ You have reached Old Indian Defense A41 — the catalogued line ends exactly here.

Book continuations

e5 3

Matching openings 4

Rat Defense: English Rat A41 1 ply deeper
Rat Defense: English Rat, Lisbon Gambit A41 3 plies deeper
Rat Defense: English Rat, Pounds Gambit A41 3 plies deeper

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

3810 catalogued lines in total · openings encyclopedia