What the...

In a contest there shall be 11 rounds, 6 rounds of chess, 5 rounds of boxing. A round of chess takes 4 minutes. Each competitor has 12 minutes on the chess timer. As soon as the time runs out the game is over. A round of boxing takes 2 minutes. Between rounds there is a 1 minute pause, during which competitors change their gear.

It's... Chess Boxing !

(via Making Light