The International Chess Federation (FIDE) and world number one Magnus Carlsen have a long history of disagreements, but on Wednesday both backed a new world championship concept that sets the stage for the Norwegian's return.

A seething Magnus Carlsen slammed his fist into a table after suffering his first defeat to world champion Gukesh Dommaraju in a classical game on Sunday in Stavanger.

Hundreds of fans crowded the arrivals area of Chennai airport, cheering alongside banks of television cameras as Gukesh made his way out of the airport after victory in taking the World Chess Championship title.

Gukesh was just seven when he watched compatriot Viswanathan Anand lose the world chess title in November 2013 to challenger Magnus Carlsen of Norway -- a match that fired up his dream to bring the crown back to India.

The 18-year-old became "the YOUNGEST WORLD CHAMPION in history", said the International Chess Federation in a post on social media platform X, after Ding resigned in a thrilling endgame that had been expected to end in a draw.

World chess champion Ding Liren, 32, from China, is defending his crown against 18-year-old Indian prodigy Gukesh Dommaraju, who is seeking to make history by becoming the youngest ever undisputed titleholder in the sport.

If both remain tied after 14 rounds, the match will move to a tie-breaker, which will be played on December 13.

The score is tied at 3.0 points each after six games, rounding off the first week of the 14-game match.

The 18-year-old will begin a best-of-14 series for the title against reigning champion Ding Liren of China on Monday in Singapore.

Gukesh will face reigning champion Ding Liren from China for another piece of history, after being the youngest player to win the prestigious Candidates Tournament.