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 Nf6 2. e5 Ne4 ◀ Undo move

♞ You have reached Alekhine Defense: Mokele Mbembe B02 — the catalogued line ends exactly here.

Book continuations

d4 2

Matching openings 3

Alekhine Defense: Mokele Mbembe, Modern Line B02 2 plies deeper
Alekhine Defense: Mokele Mbembe, Vavra Defense B02 2 plies deeper

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

3810 catalogued lines in total · openings encyclopedia