Once a pawn a time I decided to spend a few hours writing a computer game to play chess. Bit of a rookie error. It turns out there's a lot you have to check, mate. And although it ended up taking most of the weekend, and a few knights, I think I finally have it pinned down. So if you want to play a quick game, rook no further! I think it turned out great but I would love for you to check ;-)