Privacy

Your browser's key

The first time you open a game, your browser creates a random key and keeps it in this site's storage. That is how a game knows you are the same player after a reload. The server keeps only a one-way hash of the key.

If you clear this site's data, the key is gone and this browser can no longer rejoin the games it was playing.

The game

To relay a game between two devices, the game server stores its moves, time control, clocks and result. The server runs on Cloudflare. A finished game is deleted 7 days after it ends, and a game nobody joins is deleted after 24 hours.

Anyone who opens a game's link can watch it. The link is the only way in.

Turn notifications

Turn notifications are shown by this browser, from the game you left open. Nothing is stored on the server for them.

Advertising

Pages other than the board show adverts through Google AdSense, which may set cookies and use them to personalise ads. You can turn personalised ads off in Google Ads Settings (adssettings.google.com).

Contact form

What you send through the contact form is kept as a post in a private GitHub repository that only the operator can read, so it can be answered. A reply address is optional; without one there is no way to write back.