Legal
Enpasso is built on open source software. We are grateful to every project listed here.
GPL-3.0 Notice — Stockfish
Stockfish is distributed under the GNU General Public License v3.0. Enpasso ships the official unmodified Stockfish 18 WebAssembly build. You may obtain the complete corresponding source code at github.com/official-stockfish/Stockfish. A copy of the GPL-3.0 license is available at gnu.org/licenses/gpl-3.0.html.
Chess engine powering position evaluation and best-move suggestions. Distributed as a WebAssembly binary. Unmodified from the official build.
Chess move validation, PGN parsing, and game state management.
Interactive chessboard UI component.
Chess piece SVG artwork by Colin M.L. Burnett, sourced from Wikimedia Commons. Used unmodified as an optional piece set.
Chess piece SVG artwork in the Alpha style, sourced from Wikimedia Commons. Public domain — no restrictions.
Flat silhouette SVG chess pieces by femrek, sourced from OpenGameArt.org. Public domain — no restrictions.
Additional open source packages are used as build-time or development dependencies. All packages are available via their respective npm registries with full license text included.