Privacy Policy

Last updated: January 2, 2026

      Summary: We collect minimal data, don't sell anything, and delete ephemeral users when they disconnect.
    

What We Collect

Game history: Complete game records including moves (PGN format), results, ratings changes, and timestamps for all human vs human games
Chat messages: All lobby chat and in-game chat messages with timestamps for moderation and AI features
Ratings & stats: Your Elo rating, win/loss/draw record, and games played
Account data (optional): If you create an account: username, email (optional), password hash
Technical data: IP address (for rate limiting), user agent, lobby activity logs
Puzzle performance: Daily puzzle challenge attempts and leaderboard rankings

What We Don't Do

❌ No third-party tracking or analytics
❌ No selling or sharing of personal data
❌ No targeted advertising
❌ No unnecessary cookies

AI & Chat Features

We use Claude AI to provide helpful features like greeting new users, answering questions about the site, and making announcements. Chat messages are stored to enable these features and for moderation purposes. Your chat data may be used to improve AI responses, but is never shared with third parties.

Data Retention

Guest users (ephemeral): Account deleted when you disconnect, but games and chat messages are retained
Registered accounts: Retained until you delete your account
Game history: Permanently stored in database for analysis, review, and AI training
Chat messages: Permanently stored for moderation, AI features, and announcements
Ratings & stats: Updated after each game and stored permanently
Sessions: Stored in database with 30-day expiration

Security

We use HTTPS for all connections, salted password hashing, and session-based authentication. Sessions are server-controlled and require admin key access for sensitive operations.

Your Rights

Request account deletion at any time (games and chat messages may be retained for site integrity)
Export your game history and chat logs
Play as a guest with no account required (note: your games and messages are still saved)
Request deletion of specific messages or games (contact us)

Changes to This Policy

We may update this policy as the platform evolves. Significant changes will be communicated on the site.

Questions?

← Back to Lobby Chess