NEW: 60 Minutes does a special on 'Chessboxing,' where chessboxers go back and forth between boxing and chess until there's a checkmate or knockout. The sport is popular in Russia but is starting to gain popularity in the United States. "Most people, on the surface, when they hear about chess boxing, they think that the battleground is the chess board or the boxing ring. And it is. You have to be good at both," said USA coach Matt Thomas. "But the real battlefield is the minute in between the rounds." Professional chess player from Michigan, James Canty III, recently won the super heavyweight final to become the new super heavyweight chess boxing champion of the world. Wild.