Licenses & Source Offer

Effective: August 12, 2026

Goldring Chess (also known as Offline Chess) includes open-source components. This page is the public notice and Written Offer for corresponding source.

Stockfish (GPLv3)

The app ships Stockfish 18 lite, single-thread WASM (stockfish-18-lite-single), via the npm package stockfish (stockfish.js by Nathan Rugg / Chess.com), under the GNU General Public License v3.

• Site: stockfishchess.org
• Engine source: github.com/official-stockfish/Stockfish
• WASM port source: github.com/nmrugg/stockfish.js
• npm package: stockfish@18 (build used: lite single-threaded)

Written Offer: For as long as we distribute Stockfish binaries in Goldring Chess, we offer to provide the corresponding source for that Stockfish / stockfish.js build on request at [email protected], and via the public repositories linked above.

Other libraries

• chess.js (BSD)
• react-chessboard (MIT)

App copyright

Goldring Chess UI and packaging © 2026 Goldring Labs. Stockfish remains under GPLv3.