However , his title is disputed ; some regard Vladimir Kramnik as the World Chess Champion because of his victory over Garry Kasparov in 2000 .
He became the FIDE World Chess Champion by winning the FIDE World Chess Championship 2005 .
His title is disputed ; some regard Vladimir Kramnik as the World Chess Champion because of his victory over Garry Kasparov in 2000 .
He became the FIDE World Chess Champion by winning the FIDE World Chess Championship 2005 .