Chess boxing – a hybrid sport which combines the sport of boxing with games of chess in alternating rounds. Chessboxing fights have been organized since early 2003. The sport was started when Dutch artist Iepe Rubingh, inspired by fictional descriptions of the sport in the writing of Enki Bilal, organized actual matches. The sport has become increasingly popular since then. To succeed players must be both skilled chess players and skilled boxers.
Korfball – several claims that it was developed as a hybrid of netball and basketball to enable play between teams of mixed gender. Despite the origins of korfball, today it does facilitate exactly that purpose.