Engine source and licenses

Stockfish.js 19

Computer play uses the unmodified lite, single-threaded JavaScript and WebAssembly files from the stockfish 19.0.0 npm package.

• Corresponding source and build scripts
• Browse the pinned source revision
• GNU General Public License v3

chess.js 1.4.0

Move validation and game rules use chess.js, distributed under the BSD 2-Clause License.

• Source
• License

DM Sans

Self-hosted DM Sans variable font, designed by Colophon Foundry and distributed through Google Fonts under the SIL Open Font License.