If you play chess or draughts, you'll be familiar with a chessboard, but a checked pattern can be used for so much more than playing board games...

How many rectangles are there on a counting stick? How can you be sure you haven't missed any?

A chessboard has lots of squares... more than you might think at first... can you work out how many?

Can you cover a chessboard with dominoes? What if the chessboard has missing squares? Explore this famous puzzle and see if you can find an elegant solution.