The concept of "Battlebots" is two bots battling each other in an arena, controlled remotely by their handlers.
Those who survive the first round of battles are seeded into a bracket for single elimination contests.
Except in the case of a knockout (when the bot is unable to respond to a ten-second countdown), three judges decide the winner of each contest. Usually the outcome is obvious because of the damage delivered.
There are rules, but they are not discussed much unless they come into play. But the competitors are aware of them.
The different strategies employed in the building of these bots range from flame throwers to powerful flippers, and may include mini-bots that accompany the main bots for purposes of diversion or inflicting damage.
The show is a nice blend of practical engineering and gladiator-style contests.