Legal
Cookie policy
We use as few cookies as we can. Today that is one essential cookie, plus one that remembers your choice.
Last updated 22 October 2026.
Essential cookies (always on)
These keep the site working, so they do not need your consent and cannot be switched off.
| Cookie | What it does | How long |
|---|---|---|
byl_sess | Your session: keeps you signed in, holds your place in the test and protects forms against forgery. | Up to 30 days |
cookie_consent | Remembers whether you chose "Essential only" or allowed analytics, so we do not ask again. | 1 year |
Analytics (only with your consent)
There is no analytics on this site today. If we add it, it will be our own first-party analytics, never an advertising network, and it will stay off unless you turn it on. Your test answers are never part of analytics.
Advertising and third parties
None. We do not run ads and we do not load third-party trackers.
Changing your mind
You can change your choice at any time: . You can also delete cookies in your browser settings; the essential session cookie is set again on your next visit.
See also our privacy policy.