Rules

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Robot Combat Rules

Robot combat has several organizations that develop rules of play. These rules typically cover both robot construction and match procedures. However, there is no national or global league or governing body defining local rules. The sport is still young, and each event can choose its own rules, experiment, and innovate.

For most bot builders, travel to many locations to compete isn't practical, so multi-city leagues are unusual, and so there is limited standardization in arenas. Rules have instead focused on ensuring things like fair fights, impartial judging decisions, and most of all, uniform standards of safety.

Before building your robot, figure out which event you are building for. Most event organizers will use standard rules from one of the groups listed below, but will make changes for their arena, their judging situation, or other local requirements. Get the rules from your event. Read them carefully and check for exceptions or changes to the standard rules that may affect you. Also be aware that any event organizer may disqualify a robot if they feel something about it is unsafe, so if you think you've found a loophole or workaround to make your bot more destructive, clear it with the event organizer before you show up.

Here are some of the organizations which have published rules and guidelines for robot combat events. You can freely download and read any of these rules.

(National Robotics League is not on this list because only students on authorized teams may participate.)

More detail and references are needed.

Judging Systems

There are several different methods to judge a robot combat match.

As a general rule, if one robot is disabled, thrown out of bounds, or unable to travel normally on the arena floor, the judges will determine that the robot has lost the match.

If neither bot is disabled or disqualified, judges must render a decision. This is usually done with a point system weighted to bring out the best in bot designers and drivers, but designed never to result in a tie. For example, judges under SPARC rules give points for Aggression (5 points), Damage (6 points) and Control (6 points), but shared between two opponents.

If both robots appear to have suffered equal damage, each would receive equal points (3 each) using the SPARC rules. If both also exhibited equal control ability, both would receive 3 points. The judges must weigh which driver was the more aggressive to break the tie. However, it's possible on some point scoring systems for 2 of 3 judges to believe one robot has won, but the 3rd judge assigns enough points to override them.

SPARC offers example videos with judges commentary that can help new judges understand how to assign scores.

Variations in judging

Many events have done away with the detailed scoring system and simply have each judge indicate which bot they felt won the overall match. While this may lead to more consistent results, some builders get frustrated without scores to indicate why they won or lost the match. Different events also have different allowances for judges to talk with each other when making decisions. Some events want each judge to come to their own conclusions independently, while others think it better to have judges compare notes and discuss the results.

Event organizers may make exceptions for specific issues caused by the arena itself. For example, if bots gets jammed against the walls due to a design flaw or normal arena wear and tear, judges may direct opponents to stop the match and free a bot that gets stuck instead of counting that bot out of play. A "one free unstick" rule may also apply to bots that have become locked together.