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Privacy policy
Last updated: November 11, 2026.
What we do not collect
No sign-up is required. Positions, games and analysis are processed in your browser and are not sent to our server.
Browser settings
Theme, board colour, sound and difficulty are stored in your browser's local storage. Clear the site data to remove them.
Loading games
When you enter a username, your browser requests public data directly from Lichess or Chess.com. Those requests are governed by their policies.
Feedback
If you send feedback, the text, rating and e-mail (if given) are delivered to our mailbox through the FormSubmit service. We use them only to reply and improve the site.
Statistics
We count visits with Yandex Metrica, which collects anonymous data such as pages, device type and approximate country. See Yandex's policy for details.
Advertising
The site may show ads from third-party networks (such as Google AdSense or Yandex Advertising Network) in the future. These networks may use cookies to serve ads. You can opt out of personalised Google ads at adssettings.google.com.