Privacy

Last updated: 24 August 2026. Real-Time Chess does not require an account or advertising identifier. For privacy questions, email contact.real.time.chess@gmail.com.

Computer games

Computer moves are calculated by the Stockfish engine packaged in the web or mobile app. The engine is not a connected person and no position is sent to a hosted chess engine. The service keeps the selected estimated strength, assigned colour, readiness, and board state only inside the expiring active room. Computer games add no account, permanent history, advertising identifier, or new analytics fields.

Private games

Active room credentials, board state, display names, scores, and timestamps exist only for the life of a private room. Rooms expire automatically. We do not retain permanent match history.

Service and analytics data

We use Cloudflare Workers and Durable Objects to operate the game. Operational product events use allowlisted aggregate fields. Room URLs, credentials, moves, display names, and raw IP addresses are not analytics dimensions. v1 has no advertising, personalised analytics identifier, chat, account, or profile.

Cookies and secure storage

Web private games use one strictly necessary room-seat cookie. Native apps use operating-system secure storage for the equivalent room credential. Read the Cookie Notice for the details.

Artwork

In-game chess artwork is credited to macrovector / Freepik. The store icon is original Real-Time Chess artwork.

Stockfish attribution, GPLv3 terms, authors, and corresponding source are available on the Open Source Licensespage.