Robot sumo is a sport in which two robots attempt to push each other out of a circle (in a similar fashion to the sport of sumo). The robots used in this competition are called sumobots. Sumobots come in various classes, from heavy weight robots weighing as much as an adult to femto-sumo with tiny robots the size of a sugar cube.
The most common robot sumo class are sumobots made out of LEGO Mindstorms components. This page is about the not so ancient sport of Mindstorms robot sumo; how to design, build and program LEGO Mindstorms sumobots, how to program them and how to play the game.
A match consists of three games of up to three minutes each. The first sumobot winning two out of the three games is the winner of the match.