Data protection policy

Personal data

You can use this website without any personal data if you don't register.
If you register, you have to enter your email address. does not send you unsolicited email, or share your email address with a 3rd party.
There are only two reasons why we send you an email:
After registering, you get a confirmation email to confirm your email adress.
If you forget your password, and have a confirmed email adress, you can reset your password with a password reset email.
We also ask for a name. You can enter your real name or an alias or fantasy username.
If you decide to enter your real name you are giving consent to us storing it.
The name you enter is shown to you in the menu as a link to your user settings.
Your name and email address are not shared with anybody else.


This website is using cookies for technical reasons, including session cookies. An authentication cookie is used to identify registered users who are logged in.
Third party vendors, including Google, use cookies to serve ads based on a user’s previous visits to this website or other websites.

Non-personal data

We are keeping track of which puzzles you have already solved to ensure you don't see the same puzzle more than once.
This includes the ID of the puzzle, date and time of the solving, and if you selected the puzzle as a favorite.
Registered users can see a list of the last solved puzzles and their favorites.
We are also calculating a rating for you, to ensure that you get puzzles with a difficulty corresponding to your puzzle solving level.
If you are logged in, this information is stored in our database.
If you are not logged in, this information is kept in the session, and will be lost when you leave the website.

Server log

To keep track of general usage of the website, and to help finding errors, the host can store data automatically sent by your browser in the server log.
This data includes the browser type and version, operating system used, referrer URL, IP address, and date and time of the request.

Your rights in connection with your personal data

Under certain circumstances, by law you have the right to:

If you want to review, verify, correct or request erasure of your personal information, object to the processing of your personal data, or request that we transfer a copy of your personal information to another party, please contact me.