The ADCC Submission Fighting World Championship is a grappling competition involving professional athletes who have been successful at the highest levels of Luta Livre, freestyle wrestling, catch wrestling, judo, Brazilian Jiu-Jitsu, Sambo, Shooto, and mixed martial arts. It’s considered the most prestigious competition in the submission grappling combat sport. The rules of the event disallow strikes while promoting grappling and submissions.
ADCC is an acronym for “Abu Dhabi Combat Club”, the event was originally hosted in Abu Dhabi. Later host countries have included Brazil, China, Finland, Spain, the UK, and the US. Wikipedia.