1. Core Philosophy & Scope
At Chess Web (https://チェスweb.com, referred to as "we", "our", or "the Platform"), we believe that playing chess on the internet should be simple, enjoyable, and completely private. We adhere to global data protection standards including the GDPR and Japan’s Act on the Protection of Personal Information (APPI).
Chess Web is engineered to require no account creation, registration, or password setup. You do not need to provide your real name, physical address, or phone number to access our games.
2. Data Handling & Client-Side Storage
Here is an exact breakdown of what data exists and where it is stored:
(A) Browser Local Storage (Device-Only)
To remember your personal interface preferences between visits, we save non-identifiable settings in your browser's local storage:
- Board visual theme and piece sets
- Sound effect volume and audio toggles
- Preferred AI level (1 to 9) and match timer duration
- Dark mode / light mode appearance preference
These preferences reside solely inside your browser and are never transmitted to or stored on our servers.
(B) Client-Side Stockfish Execution (WebAssembly)
When you play against our computer opponent or request move hints, the Stockfish chess engine runs locally inside your browser via WebAssembly (WASM). Your moves, tactical evaluations, and thinking times never leave your computer or phone.
(C) Online P2P Play Sessions
When you play with friends online using room codes, moves are synchronized directly via Peer-to-Peer (WebRTC) protocols with fallback signaling. Once the room closes, session channels are terminated, and no long-term match records are retained.
(D) Contact Form Submissions
If you contact us via our contact form or support email, we collect your name, email address, and message text exclusively to answer your inquiry. We never sell, rent, or distribute this correspondence to marketers.
3. Cookies & Server Telemetry
We maintain standard HTTP web server logs (including timestamp, IP address, request URL, and browser User-Agent) solely for operational reliability, DDoS prevention, and security audits.
You may configure your browser to block cookies. Since Chess Web relies primarily on Local Storage for preferences rather than session cookies, blocking cookies will not hinder normal gameplay.
4. Third-Party Sharing
We do not sell, trade, or transfer any user data to outside parties, except where required by law (such as formal law enforcement court orders).
5. Security & Encryption
All connections to Chess Web are strictly encrypted using TLS 1.3/HTTPS, ensuring data in transit is protected against eavesdropping or unauthorized interception.
6. Your Rights & Data Deletion
Because all preference data is held locally on your device, you have complete sovereignty over your information. Clearing your browser cache or site data for this domain permanently erases all saved preferences.
7. Policy Updates
We may update this policy periodically to reflect platform enhancements or legal changes. Any modifications will be reflected with a revised "Effective Date" at the top of this page.
8. Contact Us
If you have questions regarding this Privacy Policy or our security practices, feel free to contact us: