Opening Explorer
Roam the whole book of openings, playing the master moves forboth sides — only book moves are accepted, so you never leave theory. The explorer names the line you're in and shows every known continuation, ranked by real Lichess masters popularity.
Commentary fromWikibooks · Chess Opening Theory(CC BY-SA 4.0), read live and lightly reformatted; shared under the same license.
Connect Lichess
Data: Lichess chess-openings (CC0-1.0); Lichess opening explorer — masters games (CC0-1.0).