Are the pairings up?

Last updated: March 21, 2026

What This App Does

Are the Pairings Up? is an independent companion app for the Tuesday Night Marathon chess tournament at the Mechanics' Institute in San Francisco. It checks pairings and results, sends optional push notifications, and provides a game browser, PGN viewer, opening explorer, and player profiles.

Data We Collect

Player Name

If you enter your name in Settings, it is stored in your browser's local storage only. It is used to find your pairing in the tournament data. If you enable push notifications, your name is also sent to our server so we can include your pairing details in the notification.

Push Notifications (subscribers only)

If you enable push notifications, the following is stored on our server:

• Push endpoint URL — generated by your browser vendor (e.g. Google or Apple), used solely to deliver notifications. Does not contain personal information.
• Player name and notification preferences (pairings/results).
• Device identifier — a random UUID assigned to your device, used to manage your subscription. Not linked to any hardware or account ID.
• Device label — a browser/OS description (e.g. "Chrome on Android"), used for your reference only.
• Delivery timestamps — when notifications were sent, displayed, and clicked, used to detect failed deliveries and avoid duplicate notifications.

Game Data

Tournament game data (player names, results, PGN move records) is sourced from publicly posted tournament pages and stored in our database. This is public tournament information, not user-submitted personal data.

IP Address

Your IP address is used solely for rate limiting API requests. It is stored temporarily with an automatic 5-minute expiration. It is not logged or retained beyond that.

Local Storage

The app caches game data, your player name, display preferences, and round history in your browser's local storage to enable offline access and faster load times. This data never leaves your device unless you enable push notifications (in which case only your player name is sent to the server).

Third-Party Services

This app is hosted on Cloudflare Pages, Workers, and D1. Push subscription data is stored in Cloudflare KV; game data is stored in Cloudflare D1. See Cloudflare's Privacy Policy.

Cookies and Tracking

This app uses no cookies, no analytics, and no tracking of any kind. There are no third-party scripts, advertising, or data brokers.

Data Retention

Push notification records expire automatically after 90 days of inactivity and are permanently deleted when you disable notifications. Game data is retained indefinitely as a public archive of tournament results. Rate limit records expire automatically after 5 minutes. Browser local storage persists until you clear it.

Your Rights

• Disable push notifications at any time via Settings. This permanently deletes your server-side subscription record.
• Clear local data by clearing your browser's site data for tnmpairings.com, or by removing your name in Settings.

Contact

Questions about this policy? Email info@tnmpairings.com.