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🎯 GOAL

📋 1. General Match Information


📖 1.1. Definition and Goal
The competition simulates traditional Sumo wrestling. The goal is for your autonomous robot to push the opponent out of the ring (Dohyo). The match is won by the team that first accumulates two (2) Yuhkoh points.


👥1.2. Team 

  • Each match is conducted between two teams/robots.

  • Only two (2) team members (the operator and the assistant) are allowed in the game area near the Dohyo.

  • One person can be the operator for a maximum of two (2) robots. The operator cannot be changed and must be the person designated during registration.

  • Video recording is allowed by the operator, the assistant, or another team member.

🤖2. Robot                               

                           

Mass (Maximum Weight)                                           

< 3kg (3000g)                       

During approval, the maximum weight is 3005g
Base Dimensions (Max Width/Length)     

Must fit inside a 20cm- 20 cm square       

During approval, a 20.3 cm - 20.3 cm template is used.
Height (Maximum)                                                           

No limit                           

Must not exceed the total diameter of the dohyo.
Autonomy                                                                     

Mandatory                           

All control components must be inside the robot.  External control (human, machine, etc.) is not allowed.
Extension                                                                 

Allowed after start                     

Must remain a single robot. Physical separation into pieces is prohibited.
Dropping Small Parts                                                     

Allowed                               

Dropping screws/washers with a total mass of <20g does not result in a match loss.
 

 

⛔🤖 2.1. Robot Prohibitions
The use of the following is not allowed:

  • Interference devices (e.g., IR LEDs that affect an opponent's sensors).

  • Parts that cause damage to the Dohyo, the opponent robot, or the operator. Normal collisions and pushing are excluded.

  • Devices that store or launch liquids, powder, gases, or other substances.

  • Flame-throwing devices.

  • Sticky substances to improve traction. Tires must not be able to lift and hold an A4 sheet of paper for more than 2 seconds.

  • Components on the front face or underneath the robot intended to destroy the opponent's blade.

  • The robot's blade or extension cannot be white (the flag is excepted).

🧰 2.2. Mandatory Equipment/Sensors

  • IR Start/Stop Sensor: The robot must be equipped with an Infrared (IR) sensor to receive start and stop commands from the referee. The sensor is the manufacturer's responsibility.

  • Function: Proper sensor function is mandatory. If it does not work, the team cannot compete.

 

  • Functionality Problem: If the robot fails to stop upon the referee's signal and exits the dohyo, the round is lost. If it continues to move within the dohyo, the match is lost.

 

  • Downforce Devices: Devices to increase vertical force (e.g., vacuum pumps, magnets, electromagnets) are allowed.

 

  • Identification Number: The robot must carry the number provided by the organizers in a clearly visible spot.

🏟️ 3. Arena / Dohyo

Diameter:  154 cm (1540 mm )
Material:  Circular, made of steel, 5 mm  thick
Color:  Black
Boundary Line:  White circular ring, 5 cm (50 mm ) wide
Dohyo Base:  Wooden surface, 5 cm (50 mm ) high
Dimensional Tolerance:  ±5% for all dohyo dimensions

ΠΑΛΗ.jpg
<-----200mm----->
<-----1540mm----->

⭕ In the center of the arena, an "X" is placed to mark the robot placement area for the player. The referee is responsible for assigning the quadrants for robot placement.

Inner Dohyo: The playing surface, including the boundary line.


Outer Dohyo: The area outside the boundary line.


Dohyo Area: The space around the ring. There must be adequate space outside the outer edge of the dohyo.
 

🛠️ 4. Technical Inspection
The technical inspection is mandatory for participation and takes place in two stages:


🚦 4.1 Inspection at the Start of the Group Stage

  • Verification of the robot's identification number. It must be clearly visible to the referees.

  • Photo capture of the robot, number, badge, and the operator's face.

  • Dimension check (20.3 cm x 20.3 cm).

  • Weighing (maximum 3005g).

  • Functionality check of the IR start/stop sensor.


🔄 4.2 Inspection Before Each Match

  • Check for the presence of the number.

  • Dimension check (20.3 cm x 20.3 cm template).

  • Weighing (maximum 3005g).

  • Functionality check of the IR start/stop sensor.

  • Check of the operator/assistant's protective equipment (gloves and glasses).

  • Confirmation that the operator has not been changed.

🏁 5. Match Conduct and Procedures


⏱️ 5.1 Match Structure and Duration
The competition will be held in a group stage - quarterfinals - semifinals - finals system to maximize playing opportunities for each robot.


Group Stage
Distribution: Robots are divided into groups depending on the number of participants. The order within the groups is random.
 

Quarterfinals
System: Elimination matches are held ? whoever loses leaves the competition.


Finals:

  • The 2 winning teams from the semifinals compete for the title.

  • The 2 losing teams from the semifinals play a match for the 3rd place.

  • Each match consists of 2 or 3 rounds. (The 3rd round occurs ONLY if the score is 1-1).

  • The total match time is 3 minutes, unless an extension is granted.

  • The winner is the team that first wins two (2) Yohkoh points, and receives 3 points in the ranking.

  • A match can end in a draw ONLY if, after multiple repetitions, the robots are equally matched and the referee awards one point to both teams with 1-1 (wins/losses).


Extension: If the match is not won within 3 minutes, an extension of up to 3 minutes may be granted. The winner is the one who scores the first Yohkoh point in the extension. Alternatively, the referees may decide the winner by draw or rematch.
1-1 Tie: If time runs out with a 1-1 score, an extension may be granted. If time runs out with a 1-0 score, the team with 1 point wins.
In case of a tie in the rankings, the point difference for and against is counted.

 


▶️⏹️🔁 5.2 Start, Stop, and Restart
Robot Placement: Done simultaneously by the operators upon the referee's signal. Any part of the robot must be behind the starting lines (Shikiri-Sen).


Round Start: The referee gives the start signal with an IR transmitter. The round starts immediately without delay.
 

Stop/Rematch: The match stops and only continues upon the referee's announcement.
 

Safe Area: The operator and assistant must retreat to the safe area before the round starts. Exiting without approval can lead to a point loss or disqualification.


Robot That Does Not Start: If a robot does not start, one (1) restart is granted. If it fails to start again, the point is won by the robot that is moving.
 

⏲️ 5.3 Duration and Breaks
Between Rounds: No breaks are allowed between the rounds of a match.
Short Break: A short break of maximum 1 minute is allowed between rounds for:

  • Cleaning the robot and wheels.

  • Configuring the robot (configuration must be done before placement on the dohyo).

🏅 6. Scoring and Yohkoh Points


🟢 6.1 "Yohkoh" Point (Round Won)
A "Yohkoh" point is awarded when:

  • A team legitimately forces the opponent to touch the area outside the Dohyo.

  • The opponent exits the Dohyo on their own.

  • Robot A causes Robot B to be completely ejected outside the Dohyo, even if A touched the outer area first.

  • The opponent is damaged, and the team representative announces they cannot continue.

  • If Robot A is unable to attack (e.g., flip) even if Robot B exits the Dohyo. 


🔁 6.2 Rematch
The match is stopped and a rematch (once) is started under the following conditions:


Tangle/Immobility: The robots are tangled or spinning without noticeable progress for 10 seconds. (If repeated: the moving robot that shows a will to fight wins).


Fast to Slow: A fast robot is stuck to a slow one for more than 5 seconds. (If repeated: the robot that moves faster and attacks more wins).


Two Fast: Two fast robots are stuck for more than 5 seconds. (If repeated: the robot that moves faster and attacks more wins).
 

Simultaneous Exit: Both robots exit simultaneously and it is not clear which one touched outside the dohyo first. (The case where one robot is clearly making the attack is exempted).


Loss of Spirit: Both robots stop simultaneously and remain still for 5 seconds without contact. (If one stops first, after 5 seconds it loses the Yohkoh for lack of spirit).

⚠️ 7. Violations and Penalties


⛔ 7.1 Major Violations

Punished with loss of the match (the opponent receives 2 Yuhkoh points):

  • Violation of Robot Restrictions (Section 2).

  • Participant Misconduct (Section 7.2).

  • Protective Equipment (Section 9).


Major Violations:

  • Scratching the dohyo's paint (width > 10cm by 5 mm).

  • The robot starts moving without the start signal.

  • The robot does not stop when the referee gives the signal.

  • The robot catches fire (leads to disqualification).


⚠️ 7.2 Minor Violations


Punished with a warning.

Two (2) minor violations accumulate and give one (1) Yohkoh point to the opponent. Violations accumulate throughout the duration of a match.


Examples of Minor Violations:

  • Contestant entering the Dohyo during the match.

  • Touching the robot after it is placed on the dohyo (except for flag adjustment).

  • Requesting a stop of the match without sufficient reason.

  • Delay of more than 60 seconds before a rematch/restart.

  • Action contrary to the spirit of fair play.

  • Exiting the waiting area without announcement.

🔧 8. Repairs and Changes


Within a Match:

  • From approval until the end of the match, the following changes are prohibited:

  • Any repairs.

  • Battery change or charging.

  • Blade change.

  • Reprogramming (only tactical selection is allowed).

  • If the blade detaches, the robot must continue without it.

  • Between Matches:

  • Battery change/charging, repairs, or replacement of defective parts/blades are allowed.

  • Inability to Continue:

  • If a robot breaks down during a match and cannot continue, the match is won by the opponent. No repair is allowed.

 

🛡️ 9. Protection and Safety


Mandatory Equipment: The operator and assistant must wear gloves and protective goggles in the playing area and during the matches.
What is Not Allowed: Sunglasses, medical latex gloves, normal fabric gloves, ski gloves.
Violation: Lack of protective equipment is a major violation and may lead to the loss of a Yohkoh point or disqualification.

 

📜 10. Final Provisions


Responsibility: Teams are responsible for their safety and the safety of their robots and are accountable for any accidents. The organizing committee is not responsible for incidents or accidents caused by the teams or their equipment.
 

Objections: Objections against the referees' decisions are not allowed. The operator can submit an objection to the referee before the match ends if they have doubts about the application of the rules.
 

Flexibility: The rules are flexible to cover changes in the number of players/content. Modifications by local organizers must be published before the event and consistently maintained.

Remote start and stop switch

Explanation of use

You can find detailed information about using the initial modules at:

http://www.startmodule.com

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