The assistant has been successfully testet with the following systems / browsers:
On Microsoft Windows 7 with
On GNU/Linux with
All pictures, text and dates shown on this website (with the exception of commercial advertising and non-commercial promotion banners) were specially created for this website. The re-use of content for any purpose is prohibited without the express permission of the copyright holder.
The generation of number puzzles is random. Any similarity to other publications is unintentional, but despite all improbability, still possible.