Chess boxing ,improved by Dutch
Combines Chess & Boxing, victory in either chess or boxing wins and ends the entire contest.

Solution

Hello,I'm WeiChe (34) from Taiwan. Chess boxing is hybrid that combines two sports-Chess and Boxing.It needs mentally and physical skills to win the fight! Although victory in either Chess or Boxing, then you will become a winner , how about victory in both games? A graphic in front side is "Checkmate!" and other in back is "KO", wish the owner of this knife could be the master of both the pen and the sword .

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