Stockfish.js 19.0.1 ? Nathan Rugg & Stockfish contributors. Source ? GPL-3.0. Unmodified lite engine.
chess.js 1.4.0 ? Jeff Hlywa & contributors. Source ? BSD-2-Clause.
Sahne pieces by Colin Stawarski, licensed under MIT.
Accuracy uses verified Chess.com scores when available, otherwise the Lichess method. Not a reproduction of CAPS2.
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