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 Sunday, 6th of February.

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?

A Alice e o Bruno vão sentar-se, frente a frente, com um tabuleiro de xadrez entre eles. Vão jogar um jogo, mas neste jogo só entra uma única peça: um cavalo. Quem vai ganhar?