The rules for the next ROBO-ONE Humanoid Robot competition have been released. There are no substantial changes to the rules, though the latest revision includes a new provision prohibiting the use of 'hooks'.
In other words, builders can't design robot appendages that would deliberately hook behind their opponents or get entangled in opponents wiring cables. This does not rule out the use of grippers or techniques that involve grabbing or hugging opponents.
For most builders this doesn't represent much of a problem, though it may be a challenge to some aggressive competitors. I'm not sure how the new rule will apply to robots like King Kizer that have unique arm/hand designs.
The ROBO-ONE 21 competition is scheduled for September 1st/2nd, but the venue hasn't been announced yet.
Via: ROBO-ONE 21 Rules (pdf)