Basically, you play a few minutes of chess to get your brain stimulated, and then you get into the ring for a few minutes to get your brained smashed.

The hybrid sport is governed by the World Chess Boxing Organisation, and held its first world championship in 2003. So it is actually quite legitimate, and according to the WCBO website, its task “is to train people in the no. 1 thinking sport and the no. 1 fighting sport and the combination of both.”

On June 21, 2003, Lennox Lewis, former World Boxing Council (WBC) heavyweight champion, and Vitali Klitschko, current WBC heavyweight champion squared off for a title match, which was billed as the “Battle of the Titans.” Lewis was controversially named the winner of the fight by technical knockout, but rather than a straight boxing rematch, many would like to see the two go at it in a match of chess boxing.