Simplify the following text for a Grade 11 native English-speaking person.
Original: In April 2008 , the World Chess Federation FIDE posted a video on its website showing its president , Kirsan Ilyumzhinov , playing a friendly chess boxing match in Elista .
Simplified: In April 2008 , the World Chess Federation , FIDE , posted a video on its website in which its president Kirsan Ilyumzhinov played a friendly chess boxing match in Elista .