Kim C, I assure you you can't be worse at math than I am. I'm a high school dropout, 16th birthday, in fact. Prior to that I was too stoned to reckon figures. Took no math in college, either. I know the tests change, but I don't remember any math on it at all, I got into grad school with a ride and fellowship. Relax a little, and ignore whatever else I was going on about. I don't know what it was, myself. Just don't, as a friend of mine did, decide that knight A and knight C will have to work out their issues. Keep 'em separated.