Quidditch is a fictional sport invented by author J.K. Rowling for her fantasy book series "Harry Potter". It first appeared in the novel "Harry Potter and the Philosopher's Stone" (1997). It is a dangerous but popular sport played by witches and wizards riding flying broomsticks.

Matches are played on a large oval pitch with three ring-shaped goals of different heights on each side, between two opposing teams of seven players each: three Chasers, two Beaters, the Keeper, and the Seeker. The Chasers and the Keeper respectively score with and defend the goals against the Quaffle; the two Beaters bat the Bludgers away from their teammates and towards their opponents; and the Seeker locates and catches the Golden Snitch, whose capture simultaneously wins the Seeker's team 150 points and ends the game. The team with the most points at the end wins.

Harry Potter plays as Seeker for his house team at Hogwarts. A real-life version of the game has been created, in which the players use brooms, but run instead of flying.

More Info: en.wikipedia.org