•The battle consists of 11 alternating rounds of chess and boxing.
•Each round lasts of 3 minutes.
•The 6 chess rounds make a total of 18 minutes, giving 9 minutes on the chess clock to each player.
•Fighters win: by knockout, by checkmate, by the judge’s decision, or if the opponent exceeds the time limit.
Weight categories:
•Heavyweight > 90 kg
•Light heavyweight 80-90 kg
•Middleweight 70-80 kg
•Lightweight < 70 kg