Caissa Codex

Caissa Codex gives every named line of the Lichess chess-openings dataset its own page: the moves on an interactive board, win/draw/loss statistics from Lichess games, results by rating band and in master games for the 1,500 most-played lines, a Stockfish 19 evaluation and the variations that follow. It also has an opening identifier for pasted moves, PGN or FEN, a page for every ECO code, a list of all 1,042 named gambits, and lets you play or practise any line in the browser. No ads, no sign-up.