Lacking motivation, Carlsen not to defend title at 2023 World Chess

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 Championship - Wikipedia

Chess Betting Odds: Ding Liren is the 8/13 favourite to win the 2023 WORLD CHESS CHAMPIONSHIP up against Ian Nepomniachtchi after Magnus Carlsen decided to not defend title!

Carlsen On Lack Of Motivation, Classical Chess, New WC Formats & Family Life

World chess champion won't defend title because he 'does not particularly like it

Margnus Carlsen not to defend title at 2023 World Chess Championship

World chess champion won't defend title because he 'does not particularly like it

Chess: Magnus Carlsen: Fifteen world titles and two major problems, Sports

Magnus Carlsen may opt against world chess defence due to lack of motivation, Magnus Carlsen

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