Riddle had tied for first. The fourth room had contained several clutches of runespoor snakes, and Riddle had swanned through with ease after commanding the snakes to leave him alone with his parseltongue abilities. Riddle had performed excellently overall, to Harry’s disgust. He’d only faltered in the last room, which had contained a single dementor. Riddle wasn’t able to cast a patronus, but he had turned a pebble on the ground into a high wall, trapping the dementor behind it for long enough he’d managed to get through the room.