Set

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A set in darts is a group of legs — essentially a "game within a game" format that adds an extra layer of structure and drama to longer matches. In set play, players must win a certain number of legs (typically best of 5, so first to 3) to win a set, and then win a certain number of sets to win the match. The most famous use of set play is the PDC World Championship, where early rounds are best of 5 sets (each set best of 5 legs), and the final is best of 13 sets. This format creates natural momentum swings — a player can lose several legs in a row but "reset" at the start of a new set. Set play changes the tactical landscape compared to pure leg format. In a straight legs format (say, first to 7 legs), every leg carries equal weight. In set play, the legs within each set build toward a mini-climax, and winning the decisive leg of a set carries extra psychological weight. Losing a set you were leading is particularly demoralizing. The set format also creates interesting "set-up" legs. If you're leading a set 2-1, the next leg becomes a potential set-winning leg for you but just a survival leg for your opponent. These asymmetric pressure situations test mental strength and composure. Not all competitions use sets. Many leagues and tournaments use straight leg formats, which are simpler and faster. The PDC Champions League and Premier League use straight legs, while the World Championship uses sets. Both formats have their advocates, and the debate about which is "better" is a perennial topic in darts discussions.