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.

Magnus Carlsen - Wikipedia

Lacking motivation, Carlsen not to defend title at 2023 World Chess Championship - Oman Observer

Magnus Carlsen's Last Gambit - Rediff.com

World champion chess player says he won't defend title

Five-time World Chess champion won't defend title in 2023

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

World Chess Championship - Wikipedia

Chess: Carlsen will not defend world championship in 2023

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

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

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

There will soon be a new world chess champion, but it won't be the world's best player - The Globe and Mail

Margnus Carlsen not to defend title at 2023 World Chess Championship

China's Ding Liren defies odds to become chess world champion as Magnus Carlsen gives up throne