How does Harry do in the trials and what happens during her last challenge?

Harry wins several riding competitions and sword competitions, while in the afternoon, she begins one on one trials. Mathin explains that it is common to slice the sash of the losing opponent, which Harry successfully does repeatedly, but that it is taboo to draw blood. Finally, she is pitted against a taller, more skilled rider and swordsman, and is angered that he seems to be letting her win. Her anger rises, and she discovers the opponents horse giving, just enough. She slices the hood from the rider, cutting him slightly, only to find it is Corlath, and to find he has successfully sliced her sash.