1. Agreement
chessmovecalc.com ("ChessMoveCalc", "we", "us") is operated by an independent developer. By using the website you agree to these Terms of Use. If you do not agree, please do not use the site.
2. The service
ChessMoveCalc provides free browser-based chess tools (a Stockfish analysis board, a notation converter, an Elo rating calculator and a board to play against the computer) and educational articles. No account is required. We may change, add or remove features at any time, and we do not guarantee that the site will always be available or error-free.
3. Fair play
You must not use ChessMoveCalc to get outside help in a game you are currently playing, whether online, over the board, in a rated event or in any competition whose rules forbid engine assistance. Doing so breaks the fair-play rules of chess platforms and of FIDE. The tools are intended for study, after-game analysis, puzzles and learning.
4. Acceptable use
You agree not to:
- use the site in a way that breaks any law or the rules of the network you are using it on (for example, your school's or employer's acceptable-use policy);
- try to gain unauthorised access to our server or interfere with its operation, including by overloading it with automated requests;
- scrape or copy the site's articles in bulk, or republish them as your own;
- click on advertisements dishonestly or encourage others to do so.
5. Intellectual property
The articles, diagrams, page designs and site-specific code are our work and are protected by copyright. You may quote short passages with a link back to the source page, and you may share links freely. Some components are open-source software used under their own licences, which take precedence for those components:
- Stockfish: GNU General Public License v3. The source code is available from the Stockfish project.
- chess.js (BSD licence), chessboard.js and jQuery (MIT licence).
- The chess piece images used on interactive boards are by Colin M.L. Burnett and are licensed under CC BY-SA 3.0.
Positions and games you enter remain yours. Chess moves and positions themselves are not owned by anyone.
6. Accuracy and no warranty
We work hard to keep the tools and guides correct (see how we check our guides), but chess engines can disagree, browser engines are weaker than desktop ones, and rating calculations are estimates. The site is provided "as is" and "as available", without warranties of any kind. See the Disclaimer for details.
7. Limitation of liability
To the fullest extent permitted by law, we are not liable for any indirect or consequential loss, or for any loss arising from your use of, or inability to use, the site, including lost games, rating points or data stored in your browser. Nothing in these terms limits liability that cannot be limited by law.
8. Third-party links and advertising
The site links to other websites and shows advertising provided by Google AdSense. We do not control, and are not responsible for, third-party sites or the content of ads. Your dealings with advertisers are between you and them.
9. Privacy
Our Privacy Policy explains how information is handled, including cookies, Google Analytics and Google AdSense.
10. Changes and governing law
We may update these terms. The "Last updated" date above shows when they last changed, and continued use of the site means you accept the current version. These terms are governed by the laws of the country in which the operator is based, without depriving you of any mandatory protections given by the law of the country where you live.
11. Contact
Questions about these terms: hello@chessmovecalc.com.