Chess boxing
The idea was started in 1992 by cartoonist Enki Bilal, and a match of chess boxing was a big story part of his graphic novel Froid Équateur. Iepe Rubingh, a Dutch artist, was took the idea from Bilal's book and started the sport in the spring of 2001. Rubingh decided that the method of play in the book, a boxing match with a chess match after, was not very good. Rubingh made the rules so a round of chess would come after a round of boxing.