1. Introduction
LEGO Sumo 1kg competition challenges teams to build powerful sumo robots using only LEGO components.
2. Competition Overview
Robots compete in sumo-style matches on a circular dohyo, attempting to push opponents out of the ring.
2.1. Team Structure
Maximum 5 team members, with only one operator allowed during matches.
2.2. Age Categories
- Elementary (6-10): Basic LEGO sets allowed
- Middle School (10-14): Standard LEGO Mindstorms
- High School (14-18): Advanced LEGO techniques
3. Robot Requirements
3.1. Construction Rules
- 100% LEGO: Only official LEGO parts allowed
- Weight Limit: Maximum 1kg including all components
- Size Limit: Must fit in 15cm×15cm square at start
- Expansion: Robot may expand after match starts
| Specification | Limit | Notes |
|---|
| Weight | 1kg | Including batteries |
| Initial Size | 15×15cm | Height unlimited |
| Materials | LEGO only | Official parts only |
4. Dohyo Specifications
4.1. Ring Dimensions
- Diameter: 77cm wooden circle
- Color: Black center (72cm) with white border (2.5cm)
- Height: 2-5cm above ground level
- Surface: Smooth, matte finish
5. Match Rules
5.1. Match Format
Best of 3 rounds, each round maximum 30 seconds. Robot that wins 2 rounds wins the match.
5.2. Victory Conditions
- Push opponent completely off the dohyo
- Opponent becomes immobile for 10+ seconds
- Opponent falls apart or stops functioning
5.3. Starting Procedure
- 5-second countdown for autonomous start
- Robots must be placed touching the white line
- 30-second adjustment period before each round
6. Safety and Fair Play
6.1. Prohibited Actions
- Damaging opponent's robot intentionally
- Using sticky substances on wheels
- Remote control during autonomous phase
Safety: Protective eyewear required for all participants.
