A good Bouldering round is hard to find—or at least hard to set. Today’s route setters for the Women’s Boulder Final were still tweaking the boulders just an hour before the event, trying to make sure that each of the four problems was the right mix of hard yet doable. On the one hand, setters want the climbers to climb the boulders and put on a good show for the crowd. But setters also want climbers to fail in various places, so that, at the end of the round, there’s a clear point hierarchy between the athletes.