Terms of service

Last updated 2026-09-09.

atkuzu is a free, open-source Takuzu puzzle game built on the AT Protocol. By using it, you agree to the following.

The service

atkuzu is provided as-is, best-effort, with no uptime or accuracy guarantee. It is a small, independently run project: expect occasional downtime, bugs, or changes without notice.

Your account

Signing in uses your own AT Protocol identity and PDS through OAuth, atkuzu never asks for or stores a password. You are responsible for the security of your own PDS account. You can revoke atkuzu's access at any time from your PDS or by signing out.

Your data

Puzzle results, statistics, and preferences you generate while signed in are written as records on your own PDS, under lexicons published for this purpose. That data belongs to you and stays under your control, independently of atkuzu.

Acceptable use

Use atkuzu the way it's meant to be used: playing puzzles. Don't attempt to disrupt the service, scrape it at abusive volume, or use it to interfere with other users' accounts or data.

Open source

atkuzu's source code is public under the MIT license at tangled.org/tomplanche.com/ATKuzu. You're welcome to read it, self-host it, or contribute.

No warranty, limited liability

atkuzu is offered without warranty of any kind. To the extent permitted by law, its author is not liable for any damages arising from your use of, or inability to use, the service.

Changes

These terms may change as the project evolves; continued use after a change constitutes acceptance of the updated terms. Questions can be raised on the issue tracker.