Robotic Sumo Wrestling Competition


Object of Game:

   Robotic Sumo is a competition where opponents attempt to push each other out of an arena (Dohyō) using their robots, cunning, and brute force. In robotic Sumo the referee (Gyoji) starts and stops the match as well as being the judge. The player who wins the most matches becomes the grand champion or Yūshō. The loser is referred to as being Shini-tai.

Length of Game:

   One match shall consist of 3 rounds. To win the round you must move your opponents robot (Rikishi) out of the sumo playfield ring (Dohyō) thus getting one point known as a "Yuko". The team who wins two rounds or receives two Yuko points first wins the match.

Play Field:

  The competition playing field (Dohyō) is 16" in diameter and made of Plexiglas.


The Gyōji's main task is to referee bouts between sumo robots. After the Yobidashi (announcer) has called them up to play it is the Gyōji's responsibility to watch over the robots as they go through the initial prebout staring contests, and then coordinate the initial charge (or Tachi-ai) between the wrestlers. The Gyōji's has the final say as to when a game is over and who the winner is.

Robot Control:

Each player uses a provided wireless IR remote control that moves the robots forward, reverse, left and right.

Rules of the Game:

  1. The contestants must wait for the referee (Gyoji) to start the round before moving the robots.
  2. You can navigate anyplace on the playing field.
  3. Your opponents robot must be completely off the playfield to count.
  4. At the end of the round you must stop playing and put the remote control down on the play field.
  5. If your robot or remote control malfunctions you must immediately notify the referee (Gyoji).
  6. If the robots get tangled with each other you must immediately stop playing and notify the referee.
  7. If both robots fall off the play field at the same time, the referee (Gyōji) can order a rematch, known as a Torinaoshi.

Robots Used For The Competition:

Robotic Sumo Wrestling using the Robotis OLLO Bugs

   The robots used for the Sumo wrestling competition are the "OLLO Bugs" made by the Robotis Company of Korea.

   The robots and wireless controllers each use 2 "AA" batteries for power.

The OLLO Bug by Robotis

by  Robotis

Prizes will be awarded to the operator of the robot that has the most wins.

Here are a few of the items that will be given away:

Hex Bugs Cybug Kits
Robot T-shirts WowWee Tribot
WALL-E Key Chains Robotic Kits
Mini Femisapien VexPlorer Robot
ROBOT Magazine Subscription Edmund Scientific Gift Certificate


For more information on the competitions e-mail us.
Here is a YouTube video of robotic sumo wrestling.

About the Robots:

   The robots used in the Sumo Wrestling competition are the "OLLO Bugs" which are made by and were provided by Robotis.

About the Play Field:

   The competition playing field is made of Plexiglas and was also provided by Robotis.

We would like to thank the following for their donations, help and support.

Vex Robotics Get Rung Interlocking Tiles & Mats
Robotis Corporation Graupner


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