Opening explorer · free · no signup
Where does this line go?
Walk the openings move by move and see what every line is called. Names and ECO codes for the whole of published theory — no account, and it works offline.
Start from the first move and pick a continuation: each one shows what it is called, its ECO code, and how often the engine's book sees it played. Reach the same position by a different move order and you get the same entry, so transpositions resolve on their own. Any position can be carried straight onto the board to play out.