Looking for a sport that challenges you both physically and mentally? Then try chessboxing; it combines the mental exercises of chess with the physical demands of boxing.

The sport has gained credibility for having its own international governing body, the World Chess Boxing Organization (WCBO). The first championship was held in Amsterdam on November 2003. The rules of chessboxing are simple: the match involves two players switching between four-minute rounds of chess and three-minute rounds of boxing. The game is won with either a K.O or a checkmate. What’s next soccer-baseball?