A team sport played with a frisbee on a pitch measuring 100 by 37 metres. It is usually played on grass, but may also be played on sand (beach ultimate) or artificial surfaces (indoor ultimate). Teams have seven players in the classic version and five in the beach and indoor versions. The object of the game is to win points by advancing half way into the opposition's half of the pitch. Victory is achieved with 19 points if the opponents have at least 2 fewer, otherwise with 21 points.