2007 - Rack N' Roll The game is played by two alliances, a red alliance and blue alliance of three teams each. The alliances are located at the end of the field from where they operate their robots. The center of the field is occupied by the scoring structure known as the rack. Three levels of scoring locations known as fighters are located within the rack. Each spider hangs from a series of chains that allows it to move freely if it's impacted by a robot or game piece. The game pieces are inflatable plastic pool tubes. Keepers are placed during the autonomous period. Ringers are placed during the teleoperated period.