Knowing that Cedric's death was the result of him winning the Triwizard Tournament alongside Harry, the boys use the Time Turner to travel back to the first challenge of the Triwizard Tournament in 1994, and sabotage Cedric during the tournament's first task in the hope of preventing his victory. Instead, they only succeed in creating an alternate reality in which Ron and Hermione never married, and thus Rose was never born, and Albus was sorted into Gryffindor. Albus discovers that this was because they chose to disguise themselves as Durmstrang students, causing Hermione to become suspicious of Viktor Krum and go to the Yule Ball with Ron instead of Viktor.