Actively maintained Mephisto fork - in-browser Stockfish / Fairy-Stockfish / Maia chess analysis, game review and autoplay for Chess.com, Lichess, BlitzTactics & TakeTakeTake. Free offline game review, plus chess.com's own Game Review on the board, run from your own account. Best-move arrows, eval bar, Humanize, Chess960 & variants.
chrome-extension chess-engine chess lichess stockfish autoplay maia chess-bot chess960 chess-analysis chesscom chess-variants lichess-bot fairy-stockfish nnue chesscom-bot best-move game-review blitztactics move-analysis
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Updated
Aug 29, 2026 - JavaScript