⚠️ RULE ZERO – Zero Tolerance & Common Sense
In all sports, Rule ZERO applies, which states:
➤ "If you are not sure whether something is allowed, then it is probably NOT allowed."
All rules are based on common sense, the spirit of the sport, and the safety of all participants.
Any deliberate misinterpretation, violation of the meaning of the rules, or attempt to exploit gray areas for unfair advantage will not be tolerated and may lead to team disqualification from the competition.
🎯 GOAL
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The aim of the Sport is to simulate the Sport of Curling.
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Sport is only for teams consisting of girls.
👥 TEAM – INDIVIDUAL - COACH
👤 Individual Participation
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Participation may be individual.
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In such a case, the individual competitor will also be the only Robot Athlete Technician of their robot.
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The competitor must be at least 10 years old (equivalent to 4th grade of primary school or above).
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Each individual competitor is allowed to have only one robot. Changing the robot during the competition is not permitted.
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Sharing robots between different individual competitors is not allowed.
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In case of a serious technical issue, the competitor may replace only the microcontroller or electronic components, after obtaining permission from the Head Judges.
👥 Team Participation
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Participation may be team-based.
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Each team may consist of two (2) to three (3) members.
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All team members must be at least 10 years old (equivalent to 4th grade of primary school or above).
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Each team must designate up to two (2) Robot Athlete Technicians.
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Only the designated Technicians are allowed in the competition area.
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The rest of the team can remain in the competition venue but cannot wait in line (they cannot occupy an additional spot). ➤ In other words, they cannot occupy an additional spot. If a team fails to comply with this rule, it will be disqualified.
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The team is allowed to change the designated Technicians before each attempt on the track to give all members the opportunity to be actively involved, although this is not mandatory.
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Each team must have a coach who is at least 20 years old.
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To ensure smooth participation, each coach must have 1 assistant for every 3 teams they register in the competition.
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Each team is allowed to have only one robot. Changing the robot during the competition is not permitted.
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Teams are not allowed to share the same robot.
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If a team encounters a serious technical issue with their robot, they may replace only the microcontroller or the electronic components, after obtaining permission from the Head Judges.
🤖 ROBOT ATHLETE – ROBOT CATEGORY
The Competition is open to Robot Athletes regardless of the robotic package or hardware used.
All Robot Athletes compete together in each age division.
1. The Robot Athlete must be autonomous.
2. Its maximum dimensions must be 40 cm Width x 40 cm Length, independent height and its mass up to 2 kg.
3. To confirm specifications, the Robot Athlete will be weighed and must fit snugly into a control box.
- The control box measures 40 x 40 cm plus two (2) mm tolerance.
4. The Athlete Robot should be placed in the control box without applying pressure.
5. The Robot Athlete must not damage the track or pose a threat to spectators in any way.
6. The Robot Athlete must have a start and stop button.
7. The Robot Athlete should have a mechanism suitable for sliding the "stone" and not "throwing" it.
8. The Robot Athlete may use tires or springs anywhere on any part of its structure.
9. The use of pneumatic devices / material or the use of air, gas, turbines and related mechanisms is prohibited.
10. Regardless of robot category, only one processor, up to 6 motors and up to 4 sensors are allowed.
11. For robot package categories where the microprocessor ports do not allow more than 4 motors, the use of port expansion components eg Lego Mindstorm multiplexer is allowed.
🧪 TECHNICAL CONTROL
1. The initial technical inspection will take place on the day of the Games at a place and time to be determined by the organizers.
2. During the initial technical check the team will be asked questions on the critical points of the robot program. The team should bring their laptop with the robot program open. If the questions show that the team has no knowledge of the program then the team receives a penalty equal to - 20% of the score they will bring to the Sport.
3. Technical inspection includes inspection of the robot according to the conditions described above. If it does not meet the specifications, it will not be allowed to compete and will be automatically disqualified from the event.
4. If a team is not in place during the initial scrutineering, this results in the team being automatically disqualified from the match.
5. Secondary technical control is also carried out before each attempt in the match by the assistant referee.
6. During the technical inspection, the dimensions and weight of each "stone" will be checked. If the "stones" do not meet the specifications the team will not compete. (See next section for specifications).
🏟️ FIELD
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The race track has dimensions of 5 meters Length x 1.30 Width
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Its color is white and the texture is printable tarpaulin.
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The track is placed on the floor for better alignment.
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At both ends there is a target / "House" with a diameter of 1 meter.
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The House is divided into concentric circles of red, white and blue.
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The white circle in the center of the House is called the Button and has a diameter of 14 cm.
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The 2nd goal / "House" on the starting side (see Robot Base) has the sole purpose of centering the Robot Athletes with the main goal / "House".
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The Hack area is scored zero as if a "stone" is found in it as it is considered out of the arena and collected by the referee.
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The closer the stone is to the Button, the higher the score; the farther away, the lower the score. The scoring is calculated using imaginary extensions of the horizontal lines, which are not visible on the track. (See the dashed line in the photo below).
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The Throwing line is marked in bold red color, and the Robot Athlete must not step on it during the throw.
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The Preparation Zone is a designated area next to the competition field where teams can place and prepare their Robot Athlete before each attempt. Only the designated Robot Technician is allowed inside the zone. In this area, teams may:
➤Attach the stone to the Robot Athlete.
➤Power on and place the robot in standby mode.
➤Make final mechanical or software adjustments, without connecting any cables to a computer.
➤Once preparation is complete and the referee signals, the Robot Athlete must be moved from the Preparation Zone to the Robot Base area for the start of the attempt.
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To test the Robot Athletes before the start of the Games there will be a test round for a specific period of time and according to a schedule that will be announced on the day of the Games.
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The stone that the Robot Athlete has to throw is a 3D Printing simulation/miniature of the granite stone that the Sport has. The "stone" has a diameter of 79mm, a height of 36.44mm and a weight from 57g to 60g.
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Each team must have 3 Stones which they should print and bring with them to the competition (The file is available here: GIRLING STONE 3D), in order to be able to customize their robot accordingly.
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Each "stone" should bear some insignia of the group. This could be some kind of sticker.
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Instructions for assembling the "stone" can be found below.
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POINTS
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For 2026, metal caster balls may be used instead of 3D-printed ones. However, the stone must not exceed 60 g in weight. Experiment with the infill of your stone’s 3D print.
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No changes are allowed to the design of the stone, nor to the socket where the caster balls are placed.
🏆 COMPETITION PROCEDURE
⏱️ PREPARATION
1. The Robot Athlete is placed in the preparation area, its technicians equip it with the "stone" and put the Athlete Robot into standby mode.
2. One of the Technicians places the Robot Athlete in the Robot Base area at the spot chosen by the team.
3. The Technician is waiting for the referee's start signal.
🏁 START - PROCESS OF THE RACE
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The Robot Athlete must start immediately after the referee's signal and after its Technician presses the Start-Stop button. If the Robot Athlete does not start within the first 5 seconds after pressing the Start button, then the start is considered invalid and only one restart is given to the team.
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The Robot Athlete should move to the throwing line where it should release the "stone". The Robot Athlete must not step on the red throwing line during the throw.
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The "stone" must slide all the way to the "house" area in order to receive points.
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If the Robot Athlete slightly crosses the throwing line then the attempt is scored 0 points.
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If the "stone" crosses the blue line / border then it is removed from the game. The referee is responsible for removing it.
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The aim of the Sport is to send his "stone" as close as possible to the "Button" in order to receive points.
🔁 ROUNDS – ATTEMPTS
🏁 Competition Phases
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The competition is conducted in two phases: Qualifiers and Finals.
🎯 Qualifiers Phase
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All registered teams participate individually on the arena.
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Each team has 3 “stones” at their disposal to make 3 separate attempts.
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The attempts are conducted in a round cycle: all teams complete their first attempt before proceeding to the second, and so on until the third attempt is completed.
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For each attempt, the team throws all 3 of its stones, and the score is calculated according to the arena scoring zones.
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Only the highest scoring attempt of the three will count as the team’s final Qualifiers score.
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After all teams have completed their attempts, the ranking is determined according to their best score.
🏆 Qualification to Finals
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The top 5 teams with the highest scores from the Qualifiers advance to the Finals.
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In the event of a tie for the 5th position, the previous best score will count for each team.
🤝 Finals Phase
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The 5 finalist teams compete together on the same arena.
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All teams take turns throwing one stone at a time, in rotation. After all teams have completed their first throw, the second throw begins, followed by the third and final throw.
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The order of play in the Finals follows the order in which the teams qualified from the Qualifiers Phase.
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During the Finals, teams may attempt to displace an opponent’s stone from its position, as this is part of the game’s strategy (similar to curling).
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Each team still has 3 “stones” for the Finals, and the final ranking is determined by the scores after all three throws of all finalist teams are completed.
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🚫 Stepping on or touching the red Throwing Line during the throw is not allowed; doing so will invalidate that throw.
📊 Scoring
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Points are awarded based on the position of each stone relative to the scoring zones of the arena at the end of each phase (Qualifiers or Finals).
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Only the final positions of the stones after all throws are considered for scoring.
❌ END OF A ATTEMPT
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When the Robot Athlete has completed his throw.
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If the Robot Athlete experiences a technical problem.
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If the Robot Athlete during an attempt sent the "stone" to the HACK area.
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Stepping on or touching the red Throwing Line during the throw is not allowed; doing so will invalidate that throw.
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If the stone stops completely outside the scoring area.
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If the stone leaves the arena boundaries.
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If any part of the Robot Athlete crosses outside the Preparation Zone before the throw is completed.
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Cases described in the "race course" section.
🚨 POINTS
Points are listed on the arena (See photo above).
🟥 TEAM DISQUALIFICATION
A team is disqualified from the event and must withdraw in the following cases:
➤ The team’s results will not be taken into account and will not appear in the official competition rankings.
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If a Robot Athlete does not comply with the specifications defined in the sport’s rules and the team refuses to make the required adjustments.
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If any of the Technicians behave inappropriately or disrespectfully, use offensive language, provoke, or verbally (or otherwise) attack fellow participants or referees.
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If it is discovered that a Robot Athlete is not operating autonomously, but instead is being remotely controlled via Bluetooth, Wi-Fi, or any similar technology.
✅ ALLOWED / ❌ PROHIBITED
✅ Allowed:
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Extending the Robot Athlete after the start of the match but this must be done before the Robot Athlete reaches the throw line and must not breach the throw line in its entirety.
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Cleaning the wheels of the Robot Athlete only with wet cleaning cloths or cleaning liquid and paper.
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The use of elastic materials (rubbers, belts, etc.).
❌ Prohibited:
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Robot Athletes to use parts that can harm spectators.
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The use of adhesives to improve adhesion.
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To change the design of the stone, nor to the socket where the caster balls are placed.
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Breaking the Robot Athlete into pieces during the race.
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Remote control.
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The use of springs.
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The wireless connection (bluetooth) with a computer or any other electronic device during the match. Teams found to have connected their robot wirelessly (team members or coaches) during the match will be disqualified from the sport.
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The restrictions listed in the Athlete Robot technical control section.
🏆WINNERS
The 3 winners for each age category are those who will collect the most points.
The best score is used to determine placement in:
🥇 1st place
🥈 2nd place
🥉 3rd place
In the event of a tie, the previous best score of the team is considered, and so on.
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