Ron Edwards has another Pool-related post up, with a video. I love reading Ron's insights into the game. I try to remember my thoughts at the time I wrote TQB and why I made the changes I did, but I fail to remember. This is because I tend to do everything more-or-less while inspiration strikes and very often if I think too long about it I just won't do it.
Anyway, if you want to understand The Pool and The Questing Beast, go check out his post. Read the comment section for a clear explanation of how the games work.