Terms of Use

These terms apply to Chess Drills, made by Rutger van Doren (the Netherlands). By creating an account you agree to them. Questions? Email herdsadmin@gmail.com.

1. The service

Chess Drills helps you learn chess openings with drills, a Daily Review and games against a chess engine. We work hard to keep it available and correct, but we cannot guarantee that it is always online, free of errors or that opening statistics are complete.

2. Your account

• You are responsible for keeping your password secret. Tell us if you think someone else uses your account.
• Choose a username that is not offensive and does not pretend to be someone else.
• If you are under 16, you need permission from a parent or guardian.
• You can delete your account at any time in Settings.

3. Fair use

Do not misuse the service: no attempts to break in, overload it, copy it automatically (scraping) or use it for anything illegal. We may suspend accounts that break these rules.

4. Free to use

Chess Drills is free. There is no subscription, there are no ads and you never need to enter payment details. If we ever want to offer paid extras, we will tell you in advance and ask for your consent first; what you use for free now stays free.

5. Your content

The drills and chapters you create remain yours. We only use them to provide the service to you. Standard openings, opening statistics (from lichess.org) and the chess engine (Stockfish) come from third parties; see Open source licenses.

6. Liability

We are not liable for indirect damage, lost data or lost profits, as far as the law allows. Nothing in these terms limits rights you have as a consumer under the law.

7. Ending

You can stop at any time by deleting your account. We may stop offering Chess Drills; if we do, we will tell you at least 30 days in advance, so you can download your data first (Settings → Download my data).

8. Changes and law

We may update these terms; for important changes we notify you in the app. Dutch law applies. Disputes go to the competent court in the Netherlands, unless the law gives you, as a consumer, the right to go to a court in your own country.