Chess Move Chooser

Terms, Conditions & Open Source Licenses

Last Updated: August 4, 2026

By accessing and using the Chess Move Chooser ("the Website" or "the Tool"), you accept and agree to be bound by the terms and provision of this agreement.

Educational Use Only & Anti-Cheating Policy

This Website is provided strictly for educational, analytical, and recreational purposes.

We do not condone, support, or encourage the use of this Tool to gain an unfair advantage or cheat in any form of competitive play. You explicitly agree that you will not use this Tool:

Violation of these terms is entirely at your own risk. The creators of this Website hold no liability for accounts banned, suspended, or penalized by third-party platforms due to the misuse of this Tool.

Disclaimer of Warranties

The Tool is provided on an "as is" and "as available" basis. We make no warranties, expressed or implied, regarding the accuracy, reliability, or availability of the engine's calculations. Chess analysis is inherently complex, and while the Tool utilizes the open-source Stockfish engine, we do not guarantee that the suggested moves are flawless.

Note: Stockfish is free software, and to the extent permitted by applicable law, it is provided without warranty of any kind, as detailed in the Open Source section below.

Limitation of Liability

In no event shall the creators, contributors, or hosts of this Website be liable for any direct, indirect, incidental, consequential, or punitive damages arising out of your access to, or use of, the Website. This includes, but is not limited to, lost data, lost rank/rating, or disciplinary actions taken against you by third parties.

Modifications

We reserve the right to revise these terms of service at any time without notice. By using this Website, you are agreeing to be bound by the then-current version of these terms.

Open Source Notice & Licensing

This Tool utilizes several open-source libraries. We respect their licenses and provide information about them below. A more detailed, developer-facing version of this table (versions, exact file paths, and update tracking) lives in docs/THIRD_PARTY_LICENSES.md in our source repository.

Warranty Disclaimer: STOCKFISH IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES.

Full License Texts

The MIT and BSD 2-Clause texts below are reproduced verbatim, as both licenses permit. For the GPLv3 (Stockfish), we link to the Free Software Foundation's official copy rather than reproduce it here: it is long, its own terms only permit distributing it unmodified, and linking to the canonical source avoids our copy ever silently drifting out of date.

GNU General Public License v3 (GPLv3) — official text — applies to Stockfish.

MIT License — applies to Chessboard.js, jQuery, fenshot, and ONNX Runtime Web

Official Version: https://opensource.org/licenses/MIT

MIT License Copyright (c) [year] [respective copyright holder — see the "Source Code" links above for each library] Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
BSD 2-Clause License — applies to Chess.js

Official Version: https://opensource.org/license/bsd-2-clause

Copyright (c) Jeff Hlywa (jhlywa@gmail.com), chess.js contributors. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.