Magnus Carlsen is the challenger of reigning World Champion Viswanathan Anand

Remains world chess champion: Boy king Magnus Carlsen still reigns

2021 World Chess Championship – Bryght Labs

Magnus Carlsen - Wikiwand

Viswanathan Anand - I was once the poster boy for rapid chess, but there is a glass ceiling of age in the format - ESPN

Norway's Magnus Carlsen wins chess world championship

Magnus Carlsen's Last Gambit - Rediff.com

World Rapid Chess Championship: Magnus Carlsen suffers early upsets; Viswanathan Anand undefeated after day one-Sports News , Firstpost

Anand vs Carlsen: the age effect in the World Chess Championship

Magnus Carlsen to give up world chess title because he's not motivated - The Washington Post

Anand to defend world chess title in home town

World Chess Championship 2014: Viswanathan Anand vs Magnus Carlsen Game 11 – Free Live Streaming

Viswanathan Anand backs Magnus Carlsen's suggestion to revisit existing world championship format - myKhel

World chess championship: Carlsen defeats Caruana