Strange sports.

Football, tennis, hockey and cricket are all popular sports around the world.

But when is a sport not a sport? Most people think that in a sport we must be strong,

use our mind and want to win. So what about these activities?

1 Chess boxing.

People play chess all over the world.

Chess players need to be fit - in body and mind.

Sometimes they need to sit and think hard for seven hours a day.

In some competitions, they play for eleven days!.

There's also a hybrid sport called 'chess boxing'.