Ever played Chess? Any good at it? All you have to do is move 16 pieces step by step around a board of 64 locations to meet your objectives. Easy! The objectives keep changing as the other side moves their pieces around as well, but still, how difficult can it be?

I have a portable Chess computer, I sometimes take it with me when I'm working away on assignments, to while away the evening hours in whichever hotel is temporarily home. With practice I am a moderate player, but I don't play sufficiently frequently to become better than moderate. Most people would agree that Chess is a difficult game, and that a computer can play it much better than they can.