This article is from the Robotics FAQ, by Kevin Dowling firstname.lastname@example.org with numerous contributions by others.
Sumo is a traditional Japanese sport in which two very large
half-naked men try to push each other out of a circle called the
Dohyou. The winner of the game is the guy who has not touched the
ground with his hand or hasn't stepped out of the circle before the
other guy did.
There is a Robot Sumo Tournament in Japan, that is held in December
every year in Tokyo. The rule of the Tournament is same as the real
Sumo except two robots fight rather than naked guys. The task of the
game is quite simple: push the opponent out of the circle.
The regulations are as follows:
1. The area of the base cannot exceed 20cmX20cm before game starts,
It is unlimited in height and can expand after the game starts.
2. The weight cannot exceed 3kg.
3. Use of internal/external combustion engine is prohibited.
4. Intention to harm the opponent or the Dohyou (playground which
includes the circle) is not allowed.
5. Contestants are free to choose control techniques, but they are
divided into 2 categories:
Radio Controlled: Contestants can use ordinary commercial R/C
equipment and remotely guide their robots.
Stand-alone: Robots cannot be controlled externally by
contestants with the exception of pushing a start button when
the contest begins.
To avoid interference with the humans who set the robots on the
Dohyou, the Stand Alone category has a special rule which says that
the game will starts exactly 5 seconds after the official signals the
start. It means that the contestant will push a start button (or
some- thing else) for the robot the same time as the offical's
signal. The robot must keep the start position for 5 seconds, and the
person who pushed the button must leave the Dohyou in that time.
Therefore, the robots in the Stand Alone category must have at a start
button and a means of timing the five seconds.
Progression in the competition consists of three game matches between
randomly selected robots. Last year  150 robots were in the
Radio Controlled category and 190 were in the Stand Alone category. If
you beat six or seven opponents, you can win the first prize of
1,000,000Yen or US$7,700. The second prize is 500,000Yen or
US$3,850. [edited from a message by Mato Hattori]
A video called "Mostly Sumo" is available from Media Magic at
415-662-2426. Their FAX is 415-662-2225.
[As of Dec 1994, the video was sold out - check again in mid-Jan 1995]
5.2 Robotics Competitions part10 Western Canadian Robot Games
Web site for WCRG
New this year is the addition of 4 BEAM events (Solaroller, Photovore,
Walkers, and Aesthetics). More details will be available as soon as
the rulebook is available.
In the interest of promoting science and technology to the public
and foster enthusiasm and creativity amongst students, the
Western Canadian Robot Games committee holds an annual robotic
contest in a centralized western Canadian location.
If you would like to be included on our mailing list or receive
our brochure, please provide me with an email or postal address.
The IEEE student branch at SAIT challenge all SUMO alumni, students,
instructors, and inventive individuals to design and enter your robots
in one or more of our contests:
ROBOTIC SUMO WRESTLING / ATOMIC HOCKEY