Iepe Rubingh, a Dutchman, thinks chess boxing is the next big sport and is trying to raise more than $500,000 from the crowd funding site Seedr. Haven't heard of chess boxing? Chess boxing consists of up to 11 alternating rounds of chess and boxing. The match begins with a three-minute chess round, which is followed by three minutes of boxing – the contest continues in this fashion, with each competitor given a total of nine minutes to make all their chess moves.

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