Terms of use
Draft, not yet reviewed by counsel. These terms describe how the closed beta is meant to work. They will be replaced by reviewed terms before anything is sold.
Last updated 23 August 2026.
1. The service
ChessPillar is a chess training website. During the closed beta it is provided free of charge, as is, and may change or be withdrawn without notice. There is no paid tier yet; when one exists these terms will be updated and you will be told before anything is charged.
2. Your account
You need an account to train. Keep your credentials to yourself. If you think someone else has used them, change your password and sign out of every browser, both under Account settings. You may delete your account at any time; see the privacy draft for what happens to your data when you do.
3. Acceptable use
- Do not try to break, overload, or reverse the service.
- Do not use automated tools to play Fights, solve exercises, or scrape content.
- Do not import games you do not have the right to import. Games from your own Lichess or Chess.com account are yours to bring.
4. Content and licences
Lessons, exercises, Fights, studies and the curriculum are ChessPillar’s own work and may not be copied or redistributed. Chess positions and move sequences themselves are not owned by anyone. Third-party software the site distributes, including the chess engine, is listed with its licence on the licences page.
5. Your games and evidence
Games you import, answers you give, and the training evidence derived from them remain yours. You grant ChessPillar the right to store and process them to run the service for you, and to use them in aggregate, without identifying you, to improve the curriculum.
6. No guarantees
ChessPillar makes no promise that your rating will rise. It keeps evidence of what you have shown you can do, and it says so plainly. Engine evaluations are the engine’s; they may be wrong, and they are never presented as the only truth about a position.
7. Liability
To the extent the law allows, ChessPillar is not liable for loss arising from the use of a free beta service. Nothing here limits liability that cannot be limited by law.
8. Changes
These terms will change when the beta opens and when paid plans exist. Material changes are announced on the site and, for account holders, by email, before they take effect.