Copyright & Licenses
© 2026 GM Chess Software. All rights reserved regarding the bespoke user interface code, layout design, and retro-styling architecture.
Third-Party Attributions & Open Source Software:
- Stockfish Engine: Licensed under the GNU GPLv3. The official Stockfish JavaScript port is utilized entirely client-side via CDN integration.
- chess.js: Developed by jhlywa. Licensed under standard open-source BSD guidelines for precise FIDE move validation.
- Chess Piece Vectors (SVG): Sourced from Wikimedia Commons standard vector set, released into the Public Domain.
For licensing queries, check our repository or reach out via our contact page.