This is not a joke. Chessboxing is a hybrid sport that combines chess with boxing in alternating rounds. The sport was invented by Dutch artist Iepe Rubingh, who was inspired by a French comic book Le Froid Equateur by artist and filmmaker Enki Bilal. Chess boxing is growing fast and has a huge following in Berlin and London. Participants must be skilled as both boxers and chess players, as a match may be won either way.
Hopefully this trend will lead to older chess player in the ring. Nothing is better than seeing old men with canes at a park boxing and playing chess!