Sven Magnus Øen Carlsen is a Norwegian chess grandmaster. He is a five-time World Chess Champion, the reigning five-time World Rapid Chess Champion, the reigning seven-time World Blitz Chess Champion, and the reigning Chess World Cup Champion. He has held the No. 1 position in the FIDE world chess rankings since 1 July 2011 and trails only Garry Kasparov in time spent as the highest-rated player in the world, while holding the record for longest consecutive reign. His peak rating of 2882 is the highest in history. He also holds the record for the longest unbeaten streak at an elite level in classical chess at 125 games.

The World Chess Championship 2013 was a match between reigning world champion Viswanathan Anand and challenger Magnus Carlsen, to determine the World Chess Champion. It was held from 7 to 25 November 2013 in Chennai, India, under the auspices of FIDE.