Sven Magnus Øen Carlsen is a Norwegian chess grandmaster. Carlsen is a five-time World Chess Champion, reigning six-time World Rapid Chess Champion, reigning nine-time World Blitz Chess Champion and the reigning FIDE Freestyle Chess World Champion. He is the only chess player to become World Chess Champion in all four chess formats. He has held the No. 1 position in the FIDE rankings since 1 July 2011, the longest consecutive period, and trails only Garry Kasparov in time spent as the highest-rated player in the world. His peak rating of 2882 is the highest in history. He also holds the record for the longest unbeaten streak at the elite level in classical chess at 125 games.
A chess prodigy, Carlsen finished first in the C group of the Corus chess tournament shortly after he turned 13 and earned the title of grandmaster a few months later. At 15, Carlsen became the youngest-ever player to qualify for the Candidates Tournament in 2005 after placing tenth in the Chess World Cup. Carlsen also won the Norwegian Chess Championship. At 17, he finished joint first in the top group of Corus. He surpassed a rating of 2800 at 18, the youngest at the time to do so.