carlsen: Lacking motivation, Carlsen not to defend title at 2023

Carlsen said he had met with representatives from The International Chess Federation (FIDE) to inform them of his decision in Madrid in connection to the Candidates Tournament -- which decides who gets a chance to challenge the world champion.

World Chess - Magnus Carlsen, the World Chess Champion

Magnus Carlsen's Last Gambit - Rediff.com

Carlsen Will Give Up His Title, Will Not Defend in 2023

Chess-Carlsen will not defend world title next year

Carlsen's spectre looms as Ding and Nepomniachtchi launch title match, World Chess Championship 2023

Magnus Carlsen Is Giving Up His World Title. Replacing Him Won't Be Easy. - The New York Times

Magnus Carlsen Versus Pragg For The Chess World Cup Title – Forbes Betting

Carlsen may not defend world chess title unless he faces Firouzja

Contenders face off for world chess title without top-ranked Carlsen - The Business Post