Cookie policy
Which cookies this site uses, who sets them and how to change your choice. Last updated 2026-10-26.
What a cookie is
A small file your browser stores. Some are needed for the site to work and need no consent; the rest are used only if you accept them.
Cookies we use
| Name | Set by | Purpose | Duration | Consent |
|---|---|---|---|---|
gdh_pid | This site | Anonymous player identifier: runs, results and streaks | 1 year, renewed with use | Not needed |
gdh_locale | This site | Your language | 1 year | Not needed |
gdh_consent | This site | Remembers your choice about cookies | 6 months | Not needed |
_ga | Google (Analytics) | Tells visitors apart to count visits | 2 years | Needed |
_ga_<ID> | Google (Analytics) | Keeps the state of the visit | 2 years | Needed |
Other storage in your browser
Local storage on your device (never sent to us) remembers whether sound is on and which puzzle help you have already seen.
Our own visit measurements use no cookies at all.
How to change your choice
Use the «Cookie settings» button below (you reach this page from the footer of any page): you can reject everything or accept everything, and change your mind whenever you like. You can also delete cookies in your browser settings.