Chessboxing is 20 years old?

[Thorin]

Yes, Chessboxing.  It's a game where you alternate four minutes of chess with three minutes of boxing.  You can win by checkmate or knockout, whatever you prefer.  And it's been around for 20 years.

http://en.wikipedia.org/wiki/Chess_boxing

Can you imagine pummelling someone and then just three minutes later having to concentrate on how to save your queen?  Insane!

[Mr. Analog]

Good gravy! That's like shot-chess but directly to the head!