Source code
Endgame is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
It is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
Download the complete source (.tar.gz)
The archive contains the app code, the Pages Function, build scripts and the puzzle-sampling tool. Third-party sources: Stockfish, stockfish.js, chessground, chess.js.
Build: npm install && npm run build — the static site lands in dist/.