Competition Format, Weight Classes, Regulations & Safety Standards

Version 1.0

Effective December 2024

INTRODUCTION

Vision & Mission

Robot Combat League represents the evolution of combat sports into the 21st century, combining cutting-edge humanoid robotics technology with the timeless appeal of competitive fighting. Our mission is to create a professional sport where human skill, strategic thinking, and technological innovation converge in spectacular fashion.

Unlike traditional robot combat competitions featuring wheeled machines, RCL focuses exclusively on bipedal humanoid robots that move, fight, and fall like human athletes. This creates a unique spectator experience that bridges the gap between human combat sports and the technological future.

Core Principles

• Fighter Ownership: Independent fighters own and maintain their own robots, creating grassroots community investment

• Weight Class Fairness: Multiple divisions ensure competitive balance and create pathways from amateur to professional

• Technical Innovation: Encourage customization and advancement while maintaining safety standards

• Safety First: Comprehensive protocols protect spectators, fighters, and technical staff

• Entertainment Value: Balance competitive integrity with spectacle and audience engagement

Sport Overview

Match Format:

Two humanoid robots, each controlled by a human pilot using VR interfaces, game controllers, or exosuit systems, compete in enclosed arenas. Matches consist of multiple timed rounds where fighters score points through strikes, takedowns, and positional control. Victory is achieved by knockout, technical knockout, or judges' decision.

Competition Tiers:

• Amateur Circuit: Entry-level fighters, local venues, learning environment

• Semi-Professional: Regional competition, ranked fighters, prize purses

• Professional: National circuit, championship belts, major sponsorships

• KillRounds: Elite destruction matches where anything goes, robots may be totaled

WEIGHT CLASSES

Robot Combat League employs a four-tier weight class system that ensures fair competition while accommodating the full range of commercially available humanoid robots. Each division has distinct characteristics, competitive dynamics, and equipment requirements.

FEATHERWEIGHT DIVISION

Weight Limit

Under 40 kg (88 lbs)

Typical Robots

Unitree R1 (30kg), Unitree G1 (35kg), similar compact humanoids

Price Range

$6,000 - $16,000

Competition Tier

Amateur to Semi-Pro

Arena Size

4m × 4m (13ft × 13ft) octagon

Round Duration

3 rounds × 2 minutes each

Special Rules

Strikes only, no weapons allowed, protective foam padding required on impact zones

Division Characteristics:

Featherweight is the entry division designed for new fighters and accessible competition. The lower price point and smaller arena size reduce barriers to entry. Emphasis is on learning control systems, basic strategy, and robot maintenance. Matches are fast-paced with frequent falls and recoveries, testing balance control and pilot reflexes.

LIGHTWEIGHT DIVISION

Weight Limit

40 kg - 55 kg (88 - 121 lbs)

Typical Robots

Unitree H1 (47kg), Ti5 Yao Guang (48kg), Booster T1 (50kg)

Price Range

$34,000 - $90,000

Competition Tier

Semi-Pro to Professional

Arena Size

5m × 5m (16ft × 16ft) octagon

Round Duration

3 rounds × 3 minutes each

Special Rules

Strikes and grappling, blunt hand-held weapons allowed (max 30cm), advanced mobility techniques permitted

Division Characteristics:

Lightweight represents the sweet spot between accessibility and performance. Robots in this class typically feature superior speed, agility, and torque compared to featherweights. The Unitree H1's 3.3 m/s running capability exemplifies the dynamic action possible in this division. Introduction of weapons creates strategic depth—fighters must decide between offensive capability and defensive mobility.

MIDDLEWEIGHT DIVISION

Weight Limit

55 kg - 75 kg (121 - 165 lbs)

Typical Robots

Unitree H2 (70kg), Figure 01 (60kg), Fourier GR-3 (60kg)

Price Range

$60,000 - $150,000

Competition Tier

Professional

Arena Size

6m × 6m (20ft × 20ft) octagon

Round Duration

5 rounds × 3 minutes each (championship: 5 rounds)

Special Rules

Full combat rules, weapons up to 50cm, ground fighting allowed, power-limited cutting tools permitted

Division Characteristics:

Middleweight is the premier professional division showcasing the most advanced combat robotics. The Unitree H2's demonstrated ability to lift a G1 robot off the ground with a single knee strike exemplifies the power level in this class. These matches feature complex strategies combining striking, grappling, and tactical weapon deployment. Championship bouts in this division are 5-round affairs that test endurance, adaptability, and robot durability.

KILLROUNDS (OPEN WEIGHT)

Weight Limit

NONE - Open weight competition

Typical Robots

Any humanoid robot, frequently premium models or heavily modified customs

Competition Tier

Elite - Top 10 ranked fighters only

Arena Size

8m × 8m (26ft × 26ft) octagon with reinforced barriers

Round Duration

Single elimination - fight until one robot cannot continue

Special Rules

MINIMAL RESTRICTIONS - Full weapons, cutting tools, crushing implements. Expect total robot destruction. No time limit.

Division Characteristics:

KillRounds represent the ultimate spectacle in robot combat—no weight limits, minimal rules, maximum destruction. Only the top 10 ranked fighters across all divisions are eligible to compete. Robots are expected to be completely destroyed or severely damaged, creating intense risk-reward dynamics. Fighters receive significant prize purses but accept total loss of their robot.

These events are held quarterly as special attractions with premium ticket pricing. The destroyed robots become valuable salvage inventory, with working parts recycled into the marketplace. KillRounds create the sport's most viral moments and drive mainstream media attention.

COMPETITION FORMAT

Match Structure

Standard Match Format

1. Pre-Fight Inspection: 15 minutes - Technical officials verify robot compliance, weight, safety systems

2. Fighter Introduction: 5 minutes - Robots enter arena, fighters connect control systems, referee briefing

3. Round Sequence: Varies by division (see weight class specifications)

4. Inter-Round Break: 90 seconds - Fighters may perform emergency repairs, recharge batteries, adjust strategy

5. Post-Fight: Winner announcement, robot retrieval, damage assessment

Victory Conditions

Knockout (KO):

A robot is unable to continue combat for 10 consecutive seconds while the opponent demonstrates ability to continue. This includes complete power loss, critical structural failure, or loss of mobility in both legs.

Technical Knockout (TKO):

• Referee stoppage due to overwhelming damage or performance disparity

• Fighter retirement between rounds

• Technical staff declares robot cannot safely continue

• Three knockdowns in a single round (automatic TKO rule)

Judges' Decision:

If no knockout occurs and all scheduled rounds are completed, three judges score the bout using the 10-point must system (see Judging Criteria section).

Disqualification:

• Repeated safety rule violations

• Deliberate attack on opponent's control system antennas

• Use of prohibited weapons or modifications

• Failure to obey referee commands

Tournament Structures

Single-Night Events

Standard format for local and regional competitions. 8-16 fighters compete in single-elimination brackets. Winners advance, losers are eliminated. Championship bout determines event winner. Typical duration: 4-6 hours including setup and intermissions.

League Season Format

Professional divisions run seasonal schedules:

• Regular Season: 10-12 events over 4-6 months

• Ranking System: Points awarded based on wins, performance bonuses

• Playoffs: Top 8 fighters qualify for championship tournament

• Championship: Title bout between top 2 ranked fighters, winner holds belt until next season

Grand Prix Events

Special multi-day tournaments with larger prize pools and international participation. Typically 32+ fighters competing over 2-3 days. Used for cross-regional champion determination and major promotional events.

JUDGING CRITERIA

Robot Combat League employs the 10-point must system adapted from combat sports, with specialized criteria reflecting the unique aspects of humanoid robot competition. Three licensed judges independently score each round.

Scoring System

10-Point Must System

The winner of each round receives 10 points. The loser receives 9 points or fewer depending on performance disparity:

• 10-9 Round: Clear winner but competitive round

• 10-8 Round: Dominant performance, multiple knockdowns or severe damage

• 10-7 Round: Overwhelming dominance, near-stoppage situations

Scoring Criteria (In Order of Priority)

1. EFFECTIVE STRIKING (40% weight)

1. Impact force and frequency: Number and power of strikes landed

2. Target selection: Strikes to critical components (head, torso actuators, joints) score higher

3. Knockdown generation: Strikes that force opponent to ground

4. Damage inflicted: Visible damage, component malfunction, mobility reduction

2. CONTROL & POSITIONING (25% weight)

5. Ring generalship: Dictating pace, position, and distance

6. Grappling effectiveness: Time in dominant positions (applicable in Lightweight+)

7. Recovery ability: Speed and efficiency of returning to feet after knockdowns

8. Defensive positioning: Evasion, blocking, distance management

3. AGGRESSION & PRESSURE (20% weight)

9. Forward momentum: Moving forward and engaging consistently

10. Strike volume: Frequency of attacks, keeping opponent defensive

11. Pursuit: Following up on successful attacks, preventing opponent reset

4. TECHNICAL PERFORMANCE (15% weight)

12. Movement quality: Balance, coordination, footwork precision

13. Technique execution: Proper striking form, efficient energy use

14. Weapon deployment: Strategic and effective use of allowed weapons (where applicable)

15. Adaptation: Adjusting strategy based on opponent's actions, damage taken

Special Considerations

• Technical Malfunctions: If a robot experiences a clear technical failure unrelated to opponent actions (battery failure, control system dropout), the round may be scored 10-10 or declared a technical draw at judges' discretion

• Point Deductions: Fouls result in point deductions: 1 point for first offense, 2 points for repeated violations, disqualification for flagrant or dangerous violations

• Weight Class Adjustments: Featherweight emphasizes recovery and mobility more heavily; Middleweight weights power and damage higher; KillRounds score only on damage inflicted

SAFETY REGULATIONS

Safety is the paramount concern of Robot Combat League. All participants—fighters, technical staff, officials, and spectators—must adhere to comprehensive safety protocols. These regulations are mandatory and non-negotiable.

Robot Safety Requirements

Mandatory Safety Systems

1. Primary Kill Switch: Wireless emergency stop accessible to fighter, referee, and arena control. Must cut all power to actuators within 0.5 seconds. Redundant backup required.

2. Geofencing: Robots must have programmed movement limits preventing operation outside designated arena boundaries. Automatic power-down if boundaries breached.

3. Impact Limiters: Featherweight division requires foam padding on all strike surfaces. Higher divisions may use harder materials but must pass impact testing.

4. Communication Encryption: Control signals must be encrypted to prevent interference or hijacking. 128-bit minimum encryption standard.

5. Fail-Safe Defaults: Loss of control signal must result in immediate safe mode: robot lowers to stable position and powers down actuators.

Prohibited Modifications

• Projectile weapons: No firearms, pneumatic launchers, or any mechanism that fires objects

• Explosive materials: No pyrotechnics, explosives, or incendiary devices

• Chemical weapons: No liquid sprays, adhesives, or chemical irritants

• Electromagnetic weapons: No devices designed to disrupt opponent's electronics (exception: this is legal in KillRounds)

• Autonomous operation: Robots must remain under human control at all times. No fully autonomous AI combat systems.

Arena Safety Standards

• Barrier Specifications: Minimum 2.5m height polycarbonate walls, steel reinforcement for Middleweight and KillRounds. Rated for 5,000N impact force.

• Emergency Access: Four clearly marked emergency entry/exit points around arena. Technical crew stationed at each point.

• Spectator Distance: Minimum 3m clearance between arena barrier and first row of spectator seating. Additional clearance for higher weight classes.

• Debris Containment: Arena floor must have drainage system for hydraulic fluids. All debris cleared between matches.

• Lighting Standards: Minimum 1000 lux at arena floor. Emergency lighting system required. Strobe effects prohibited due to robot vision systems.

Personnel Safety

Fighter Requirements

• Safety Briefing: Mandatory pre-event safety briefing covering emergency procedures, arena rules, and specific event hazards. Attendance verified by signature.

• Equipment Inspection: All control equipment inspected 30 minutes before scheduled match. Backup controllers required for all divisions.

• Insurance: Fighters must carry liability insurance (minimum $1M coverage) or purchase event insurance through RCL.

• Age Requirements: Minimum age 18 for all divisions. Minors may participate with parent/guardian co-pilot and signed liability waivers.

Technical Crew Safety

• Personal Protective Equipment: Hard hats, safety glasses, steel-toe boots mandatory for all crew entering arena

• Arena Entry Protocols: No entry without referee clearance. All robots must be powered down and disconnected before human entry.

• Electrical Safety: All crew working with robot power systems must have electrical safety certification. Lockout/tagout procedures required.

• Emergency Response Training: Minimum two crew members per event with first aid/CPR certification. Fire extinguishers positioned at all entry points.

Incident Response Procedures

Level 1 - Minor Incident (Technical Malfunction):

• Referee signals timeout

• Both robots powered down

• Technical crew assesses situation

• Match resumes or postponed depending on repair time

Level 2 - Moderate Incident (Barrier Breach, Component Ejection):

• Emergency stop activated - all robots powered down immediately

• Arena evacuated of non-essential personnel

• Damage assessment before spectator area cleared to re-enter

• Match canceled, rescheduled at league discretion

Level 3 - Critical Incident (Injury, Fire, Structural Failure):

• Full arena emergency stop

• Spectator evacuation initiated

• Emergency services contacted immediately

• Event suspended pending investigation

• Full incident report filed with league officials and relevant authorities

TECHNICAL SPECIFICATIONS

Robot Requirements

Minimum Standards (All Divisions)

• Bipedal Configuration: Robot must walk on two legs. Wheeled, tracked, or quadrupedal designs prohibited.

• Autonomous Stability: Must demonstrate ability to stand and walk without external support for minimum 5 minutes.

• Degrees of Freedom: Minimum 12 DOF (6 per leg). Recommended 20+ DOF for competitive performance.

• Height Restrictions: Maximum 200cm standing height. Minimum 100cm.

• Power Source: Battery-powered only. Tethered power prohibited. Minimum 30-minute runtime required.

Allowed Modifications

• Structural Reinforcement: Armor plating, joint protection, impact-resistant materials permitted within weight limits

• Actuator Upgrades: Higher-torque motors, upgraded servos allowed if weight compliant

• Custom Hands/Grippers: Modified end effectors for weapon holding or grappling (division-dependent)

• Sensor Additions: Additional cameras, IMUs, force sensors to improve control

• Cosmetic Modifications: Custom paint, decals, LED lighting (as long as doesn't blind opponent cameras)

FIGHTER CONDUCT & ETHICS

Code of Conduct

All participants in Robot Combat League events are expected to maintain the highest standards of sportsmanship and professionalism. This code applies to fighters, technical staff, coaches, and associated personnel.

Required Behaviors

• Respect for Opponents: Treat all fighters with dignity before, during, and after matches

• Respect for Officials: Comply with referee instructions immediately and without argument

• Honest Competition: Compete fairly without attempting to circumvent rules or sabotage opponents

• Safety Compliance: Follow all safety protocols without exception or complaint

• Professionalism: Maintain appropriate behavior in public appearances and on streaming platforms

Prohibited Behaviors

• Unsportsmanlike Conduct: Excessive celebration, taunting, verbal abuse

• Technical Interference: Attempting to hack, jam, or disrupt opponent's control systems

• Fraud: Misrepresenting robot specifications, weight, or capabilities

• Illegal Modifications: Using prohibited weapons or systems, exceeding weight limits

• Match Fixing: Any form of collusion or deliberate loss for financial or ranking gain

  ---

  APPENDIX

Glossary of Terms

• Actuator: Motor or mechanical device that enables robot movement

• DOF (Degrees of Freedom): Number of independent movements a robot can make

• Kill Switch: Emergency stop system that immediately cuts power

• Knockdown: When robot is forced to ground and takes >3 seconds to recover

• Torque: Rotational force, measured in Newton-meters (N·m)

• Pilot: Human operator controlling the robot

• Ring Generalship: Controlling position, distance, and pace of combat

• Technical KO (TKO): Stoppage by referee or retirement

Control System Types

VR Control:

Fighter wears VR headset providing robot's viewpoint. Body movements tracked and translated to robot motion in real-time. Provides most immersive experience but requires significant training.

Game Controller:

Standard gaming controllers (Xbox, PlayStation, Nintendo) with button/joystick mapping. Most accessible option for new fighters. Limited fine control but excellent for learning.

Exosuit Control:

Fighter wears motion-capture harness that directly mirrors their movements to robot. Provides intuitive control but requires physical conditioning. Most common in professional divisions.

Hybrid Systems:

Combination approaches using multiple input methods. For example, VR for vision with controller for fine hand movements. Allowed in all divisions.

###

OFFICIAL RULEBOOK VERSION 1.0

Effective December 2024

Subject to revision. Check website for current version.