A couple days ago I was at a friends house, and he had to do something for his sister or something like that. So he left me with his Mac to occupy myself. Being the bored person that I was, I decided to fire up a game of chess. It went fairly well; My strategy was able to take down most of their pieces while protecting my own. Around then he got back, but he wanted to see me finish the game, so I kept playing. But when I got the computer down to a single rook and his king, for some crazy ass reason, the rook turned invincible and the king turned invisible. It took both me and my friend a half an hour and all but three of my remaining pieces to beat the AI.
WTF? Why does the AI cheat like that? Has anyone else ever had this happen?