Freestyle Chess Grand Slam tour boss Jan Henric Buettner and all-time great Magnus Carlsen have called on International Chess Federation (FIDE) president Arkady Dvorkovich to resign after talks over an agreement about the new series fell through.

This isn't just another chess tournament though, with a public spat between Carlsen and the promoters of the FCGT with FIDE in the build-up to the tournament.

The feud saw FIDE on one side and prominent players such as Magnus Carlsen on the other. Why was the chess world in turmoil in recent weeks and what has changed now? We explain.

World champion D Gukesh will take on Fabiano Caruana of the United States in the two-game quarter-final after the latter picked the Indian in a unique format typical of Freestyle Chess Grand Slam, in Hamburg,

The five-tournament series will unfold through the year, with Paris, New York, New Delhi and Cape Town being the other four host cities. It will end with the final competition from December 5 to 12

World Champion D Gukesh began his campaign at the Freestyle Chess Grand Slam tour with three draws and a lone loss, signalling that he is gradually coming to terms with the new format.

If you or someone you know has a gambling problem, call 1-800-GAMBLER On Friday, Magnus Carlsen begins his quest to grow the popularity of an alternative chess variant and win the tournament itself.

Magnus Carlsen questioned the validity of classical chess as a measure of skill, favoring rapid chess. Gukesh acknowledged the quality of their championship match, while Carlsen ruled out a title clash.