For the NXT Generation
Sumo games we have made 2 arenas, see photo below. Each combat arena
is circular and approx. 120cm in diameter. The combat arena has been
painted black and there is an approx. 5cm wide white line at the
outer circle of the combat arena. The combat arena has a smooth
surface and is elevated approx. 3cm above the ground.
All MINDSTORMS NXT/RCX
Sumo robots must be build 100% of original LEGO parts (no glue,
cutting, melting, or other kind of modifications are allowed). This
rule also apply to sensors and motors. There is no limits to how
many LEGO, MINDSTORMS NXT/RCX sensors, motors, or NXT/RCX bricks you
use. No home made sensors are allowed.
All robots must be able to fit within a square of 33 x 33 cm.
At least one LEGO MINDSTORMS brick (NXT/RCX) must be part of the
There are no limits to the height of the robot.
The total weight of the robot are not to exceed 1000 gram. The robot
will be weight before the competition start. Better be 1 gram below
the limit rather than 1 gram above!
This is how we play the
MINDSTORMS Sumo game
The Sumo robots are
placed on the game combat arena approx. 30 cm apart from each other
and at the same distance from the center of the combat arena. The
start line is marked on the combat arena. The robots must be placed
parallel to each other with the front facing opposite each other, so
that the robots will have to search each other before any fighting.
This means the robots must start their motion by moving away from
each other and not directly towards each other.
The competition goes in several rounds. Each round is limited to max
3 minute. Each round consist of 3 half times of max 1 minute each.
If no ones win before the 3 minutes has gone it will be a tie.
The winner of
a round is the robot who has won most of the 3 half times. The
winner of a round gets 2 points. The loser gets 0 points and a tie
gives each team 1 point. If the 2 robots are going to hang on to
each other in a given half-time the robots drivers can agree to
start the half-time over again. This allows for the robots to be
started again but the rule about the maximum 3 minutes still apply.
The max 3 minutes applies even if not all 3 Half-times has been run.
At the start of each half-time
it will be counted down 3, 2, 1, GO!. The Robot drivers then
activate their SUMO robot and steps immediately away from the combat
arena. The robots must wait at least 3 seconds before it is allowed
to begin moving on the combat arena. The robot is allowed to begin
to change shape immediately after it has been activated, it may just
not begin to drive before the 3 seconds have elapsed. The robot's
first driving direction must be directly away from the center. If
there is no obvious front of the robot, its first run motion define
the robot's front end. The robot must make it first move no later
than 10 seconds after the start. The robots will remain in combat
until one of them is rendered harmless or removed from the
battlefield. A robot is declared "removed from the arena" when any
part of the robot (fixed or loose), falling from the combat arena or
touches the floor outside the combat arena. A robot that just hangs
on the edge is declared not removed until some of the robot touches
The winner of a half-time is
that robot which make the opponents robot harmless or removed from
the combat arena. If a robot commit "suicide" by running off the
side of the combat arena the opponent wins also.
The judge has the final word.
Looking forward to seeing you
on the combat arena
If you have any questions
feel free to contact: Carsten +45 29495051 or Ejner