The chapter opens with a description of a race around the castle. It's not a race, it's just a series of laps around the circumference of the castle, and the immortals are trying to get the most out of it. They're trying to make the most of the time they have, and they've got a lot of tricks up their sleeves. One of the tricks they're using is to make sure that the people around them don't cheat them. This is a good one, they say, because it'll make them feel better about their training, and it will make them want to do it even more