About the chess engine
Sjakki uses Stockfish as its chess engine when you play against bots and analyse games. Stockfish is free software, licensed under the GNU General Public License version 3 (GPL-3.0).
The engine is loaded as a separate file in your browser, apart from the rest of Sjakki, and runs locally on your machine. We serve the lite single-threaded build stockfish-18-lite-single (WASM).
In accordance with GPL-3.0 we provide access to the licence text and to the source code for the engine builds we serve.