Cookie Policy

Last updated: April 2026

This policy explains how Chess Calculator uses cookies and similar technologies in accordance with the EU ePrivacy Directive and GDPR.

What Are Cookies?

Cookies are small text files stored on your device when you visit a website. They help the website remember your preferences and improve your experience.

Essential Cookies

These cookies are required for the site to function and cannot be disabled:

• next-auth.session-token — Authentication session (expires when browser closes or after inactivity)
• next-auth.csrf-token — Security token to prevent cross-site request forgery
• theme — Your dark/light mode preference

Functional Cookies

• localStorage items — Chess board preferences, language selection, and UI state

Third-Party Cookies

We use Google OAuth for sign-in, which may set its own cookies during the authentication flow. We do not use advertising cookies.

Managing Cookies

You can manage cookies through your browser settings. Disabling essential cookies may prevent you from signing in or using certain features.

Your Rights

Under GDPR, you have the right to access, correct, or delete your personal data. Contact us at support@chesscalculator.com to exercise these rights.