Euclidean geometry is the kind you were taught at school, the world of sines and cosines, and the square on the hypotenuse ...

It’s also well-known that playing as white offers at least a slight (but sometimes decisive) advantage during any given match ...

As avid puzzlers know full well, the humble jigsaw puzzle is a thing of beauty in multiple ways. Not only are jigsaws an absorbing time sink, but multiple studies have demonstrated they are good for ...