Only if you tick "Record this game" before a game:
If you use the feedback form, we store your message, the contact you give (if any), your browser's name and version, and, if you leave that box ticked, your player ID and last game.
We do not store IP addresses, and use no cookies, analytics or advertising. The site runs on Cloudflare, which keeps its own short-lived request logs.
To measure how strong the bots are against people, and how people's moves differ from the bots'. Results may be published in aggregate, never game by game with your ID.
Untick the box and nothing is sent.
Your player ID in this browser: (none: nothing recorded from this browser)
Deleting removes every game recorded under an ID straight away, and forgets the ID in this browser. To delete games from another browser, open this page there, or paste that browser's ID below.
Questions: use the feedback form.
Games are kept for up to five years.