© 2026 Little Chess Explorers. Little Chess Explorers is the trading name used by the sole trader who delivers the programmes.
The board on this site plays against Stockfish 18, running in your own browser. Stockfish is free software licensed under the GNU General Public License version 3. Source: official-stockfish/Stockfish and the WebAssembly build at nmrugg/stockfish.js. Chess rules are handled by chess.js (BSD licence). The chess pieces on this site were drawn for it, so no piece set licence applies.