Problems

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 late May.

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

Can you tile a chessboard with two missing squares?

How many queens and knights can you place on a chessboard?

In how many ways can you place 8 queens on a chessboard?

Alice and Bob sit down, face to face, with a chessboard in front of them. They are going to play a little game, but this game only has a single knight... Who will win?