Chess Boxing

Chess Boxing? Apparently, yes.

"The basic idea in chessboxing," explains the author of the op. cit. site, "is to combine the no.1 thinking sport and the no.1 fighting sport into a hybrid that demands the most of its competitors – both mentally and physically, yet which can be performed by easiest means. In a chessboxing fight two opponents play alternating rounds of chess and boxing. The fight goes over a maximum of 11 rounds, 6 rounds of chess and 5 rounds of boxing. The fight is either decided by checkmate or ko."

"The fight is either decided by checkmate or ko." One can only wonder.