What are the different formats used in the PDC World Darts Championship, and how do they differ?

The PDC World Darts Championship is an annual professional darts tournament. The championship consists of a number of different formats, with the primary format being the best of sets. The number of sets in a match depends on the round of the tournament.

The early rounds of the tournament are played in a best of five sets format. The second round is played in a best of seven sets format, while the third and fourth rounds are played in a best of nine sets format. The quarterfinals are played in a best of eleven sets format, while the semifinals are played in a best of thirteen sets format. The final of the tournament is played in a best of fifteen sets format.

The winner of each set is the player who is the first to reach a certain number of legs. The number of legs needed to win a set also depends on the round of the tournament. In the early rounds, players need to win three legs to win a set, while in the later rounds, players need to win five legs to win a set.

The PDC World Darts Championship is one of the most prestigious events in the sport of darts, and is known for its exciting and competitive format.