Harry and his friends go through a series of challenges to get to the central ordeal, finding the Sorcerer's Stone. They go through the necessary steps to finally get there. First, they sneak past Fluffy, the three-headed dog. The trio then must go through Devil's Snare, a suffocating plant. Next, they need to get the correct flying key to open the door to the next challenge. Once Harry, Ron, and Hermione open the door, they need to play a game of life-sized Wizards Chess. Harry must go on to the next stage, the central ordeal, by himself as Hermione is helping Ron because he got injured from the match.