Licenses, Attributions, and Legal Notices
crazychess.wtf is built using open-source software and freely available chess data. We comply with all applicable licenses and give proper attribution to our sources.
Source: database.lichess.org
License: CC0 1.0 Universal (Public Domain Dedication)
Usage: Chess puzzles, games, and analysis data
We use puzzles and games from the Lichess database, which are available in the public domain. Lichess has waived all copyright and related rights to this data worldwide under CC0.
Source: stockfishchess.org
License: GNU General Public License v3.0 (GPL-3.0)
Usage: Chess position evaluation and move analysis
Stockfish 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.
Source Code: Available at github.com/official-stockfish/Stockfish
License: MIT License
Usage: Chess move validation and game logic
We use the PChess library, a PHP implementation of Chess.js, for handling chess rules and move validation.
Source: Public domain chess opening classifications
Usage: Opening identification and naming
© 2025 crazychess.wtf. All rights reserved (except where noted above).
Original content, design, code, and branding of crazychess.wtf are protected by copyright law. This includes but is not limited to:
The name "crazychess.wtf" and associated logos are trademarks of crazychess.wtf. Unauthorized use of these trademarks is prohibited.
This website is designed for educational and entertainment purposes. We believe our use of chess puzzles, games, and analysis constitutes fair use under copyright law as:
If you believe that content on our website infringes your copyright, please contact us through our contact page with the following information:
THIS WEBSITE AND ALL CONTENT ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. TO THE FULLEST EXTENT PERMITTED BY LAW, WE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO:
IN NO EVENT SHALL CRAZYCHESS.WTF BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES ARISING OUT OF OR RELATING TO YOUR USE OF THE SERVICE.
These legal terms shall be governed by and construed in accordance with applicable laws. Any disputes shall be resolved in the appropriate jurisdiction.
For legal inquiries, copyright concerns, or licensing questions, please contact us through our contact page.
As we use GPL-licensed software (Stockfish), we comply with GPL requirements:
Last Updated: January 2025
This legal information page may be updated as we add new features, data sources, or third-party services. Please check back periodically for updates.
