I kid you not:
One man makes his move, and respectfully looks up to the gentleman seated across from him. The second man pensively nods his head in recognition of a good move. He thinks to himself: One more move like that will bring about a checkmate, unless I can...
Then they stand up, don a pair of gloves, and proceed to beat the living crap out of each other while others gape in horror! In a few minutes, the first man falls unconscious to the floor. Man number two walks away a champ in spite of the impending checkmate against him.
This article available online at:
http://www.theatlantic.com/daily-dish/archive/2008/03/chess-boxing/218687/
