Blog posts with problems to get your brain going! You get a new problem every fortnight and the solutions are published later.

If you want the problems delivered to your inbox be sure to subscribe to the Problems newsletter.

The next problem is scheduled for Sunday, 6th of February.

_{You may notice some problems are missing... I'm still migrating articles from my old blog.}

Two doors, one gives you eternal happiness and the other eternal sadness. How can you pick the correct one?

Syncro is a beautiful game where you have to unite all the petals in a single flower. In how many moves can you do it?