1. What Cookies Are
Cookies are small text files stored on your device when you visit a website. Similar technologies (local storage, pixels, SDKs) work the same way. We use them to keep C4Chess secure and working, to remember your preferences, and — only where you allow it — to understand how the platform is used.
2. Categories of Cookies We Use
Strictly necessary: required to run the service — signing you in, keeping your session secure, remembering your cookie choice, and load balancing. These cannot be switched off in our systems.
Functional / preference: remember choices such as your portal mode (academic or play) and light/dark theme so the experience is consistent.
Analytics / performance: with your consent where required, help us measure usage and improve the platform. We aim to use privacy-friendly, aggregated analytics and do not use cookies to build advertising profiles of you.
3. We Do Not Use Advertising Cookies
C4Chess does not use cookies for third-party behavioural advertising and does not sell or share personal information collected via cookies for cross-context behavioural advertising. This is especially important because the platform is used by children.
4. Your Choices & Consent
Where the law requires consent (for example under the EU/UK ePrivacy rules and GDPR), non-essential cookies are only set after you accept them in our cookie banner. You can change your mind at any time by clearing the C4Chess cookies in your browser, which will bring the banner back.
Most browsers also let you block or delete cookies through their settings. Blocking strictly necessary cookies may stop parts of the service from working.
5. Cookies Set by Others
Some cookies may be set by service providers acting on our behalf (for example authentication and hosting). Their processing is governed by contracts requiring them to protect your data. See our Privacy Policy for how we share data and safeguard international transfers.
6. Changes & Contact
We may update this Cookie Policy; the "Last updated" date reflects the current version. Questions can be sent to privacy@c4chess.com. Website: www.c4chess.com.