The Board and Squares

Hi! I'm Pesha, and I used to mix up squares too. Look: the board is 8 by 8 squares, light and dark taking turns. The files are labelled with letters a–h from left to right, and the ranks with numbers 1–8 from bottom to top. So every square has a name, like a house address: a letter plus a number. It seems tricky at first, but in a couple of lessons you'll be naming squares faster than me!

Let's check right away! If there are 8 files and 8 ranks too, you can just multiply them. I once counted 63 — turned out I'd skipped one. How many squares are there on the board in total?