Your numbers look right to me. Jrowland's post is confusing, but if we take the one before it and apply -2 Novels/+1 Board Games, and then apply your vote of -2 Board Games/+1 Single-Player Computer Games, the result is 13/8/17.I tried my best to figure out what the actual values are, but apparently I can't see some of the posts in this thread*. So if someone could go back and check to make sure they are correct, that would be great.