Open Source & Credits
A clear record of the engine and third-party software used in Pixel Vault.
Stockfish chess engine
Chess uses Stockfish 19 through the stockfish.js 19.0.1 lite single-threaded browser build. The corresponding JavaScript and WebAssembly files are hosted by Pixel Vault at /stockfish/.
Stockfish and the engine portion of Stockfish.js are free software under the GNU General Public License version 3 (GPLv3). You may obtain the license and notice files here:
- Full GPLv3 license text
- Stockfish source and attribution notice
- stockfish.js source and build system
- Upstream Stockfish source
Where a full Corresponding Source package is required, the source and build instructions must match the engine files actually distributed on this site. Upstream projects are linked for access to source; the site operator should retain an exact-version build archive.
Chess rules library
Pixel Vault loads chess.js 1.4.0 for chess rules and legal move handling. The project and its license can be found at github.com/jhlywa/chess.js.
Original game code and credits
Pixel Vault's own arcade UI, sound effects, progression systems, and other original components are maintained as part of the Pixel Vault project. The games use classic genre inspiration; the project is not an official release from the owners of older commercial game titles.
Open-source license terms are not replaced or limited by this site's general Terms of Use.