Privacy Policy
Last updated: January 30, 2026
Overview
chess.rodeo provides free chess game analysis powered by Stockfish engine. This Privacy Policy explains how we collect, use, and protect your information when you use our website and Chrome extension.
Information We Collect
Chess Game Data
When you use our Chrome extension or manually import games, we collect:
- Chess.com/Lichess username (public)
- Game PGN (Portable Game Notation)
- Game metadata (date, time control, result, player ratings)
- Opening information and move sequences
Important: We only access publicly available game data. We do not collect any private or personal information beyond your public username.
Analysis Data
When you analyze games, we store:
- Stockfish engine evaluations for each position
- Move classifications (best, excellent, good, inaccuracy, mistake, blunder)
- Accuracy scores calculated using the Lichess formula
- Opening detection results with ECO codes
Technical Data
We automatically collect standard web server logs including:
- IP address
- Browser type and version
- Device information
- Access times and referring URLs
How We Use Your Information
We use the collected information to:
- Provide chess game analysis and insights
- Store your game history and analysis results
- Identify patterns and weaknesses in your gameplay
- Generate aggregate statistics and recommendations
- Improve our service and fix technical issues
- Prevent abuse and ensure service stability
Chrome Extension Permissions
Our Chrome extension requires the following permissions:
activeTab
Used to detect when a game ends on Chess.com and inject the "Analyze on chess.rodeo" button.
storage
Used to save user preferences such as development mode settings. No personal data is stored locally.
host_permissions
chess.com - To detect game completion and extract game IDs. chess.rodeo - To communicate with our analysis service.
Data Storage and Security
Your game data and analysis results are stored in our secure PostgreSQL database. We implement industry-standard security measures including:
- Encrypted connections (HTTPS/TLS)
- Regular security updates and patches
- Access controls and authentication
- Regular backups
Third-Party Services
We interact with the following third-party services:
Chess.com API
We fetch publicly available game data from Chess.com's public API. Please refer to Chess.com's Privacy Policy.
Stockfish
We use the open-source Stockfish chess engine running on our servers for analysis. No data is shared with external parties.
Cookies and Analytics
We keep tracking to a minimum. The only cookies we set are strictly necessary for the site to work — for example, to keep you signed in — so we don’t show a cookie consent banner. Our analytics are privacy-friendly and, for most visitors, completely cookieless.
Essential Cookies
These cookies are necessary for the website to function and cannot be disabled. They include cookies that keep you signed in and remember basic preferences.
Analytics
We use two analytics tools, depending on where you are:
- Umami: A privacy-friendly, self-hosted analytics tool used for all visitors. It is cookieless, sets no tracking identifiers, and does not collect personal data or follow you across sites. It also captures masked session replays and aggregate click heatmaps to help us improve the interface: these are cookieless and mask everything you type into forms and text fields, so the content you enter is never recorded.
- Yandex Metrika: Loaded only for visitors in Russia and the CIS, where it helps us understand how the site is used. It may set cookies; these regions fall outside the EU/ePrivacy consent regime.
Data Retention
We retain your game data and analysis results indefinitely to provide you with historical insights and track your progress over time. You can request deletion of your data at any time by contacting us.
Changes to This Policy
We may update this Privacy Policy from time to time. We will notify you of any significant changes by updating the "Last updated" date at the top of this page.
Contact Us
If you have any questions about this Privacy Policy or our data practices, please contact us:
Website: chess.rodeo
Email: support@chess.rodeo