The World Chess Championship is the most prestigious and challenging chess tournament in the world, where the reigning world champion defends their title against a challenger who has qualified through a series of qualifying tournaments.

Russia (including the Soviet Union) has won the most Chess Olympiads, with a total of 23 gold medals.

Magnus Carlsen is the current World Chess Champion, having won the title in 2013 and successfully defended it in several subsequent matches.

The Chess Olympiad is a team chess tournament open to all players and is held every two years, with each team representing a country.

The Candidates Tournament is a series of chess tournaments that determines the challenger for the World Chess Championship.

The FIDE Grand Prix is a series of chess tournaments that award points towards qualification for the Candidates Tournament.

The Linares International Chess Tournament is an annual chess tournament held in Linares, Spain.

The Tata Steel Chess Tournament is an annual chess tournament held in Wijk aan Zee, Netherlands.

The Dortmund Sparkassen Chess Meeting is an annual chess tournament held in Dortmund, Germany.

The London Chess Classic is an annual chess tournament held in London, England.

The Sinquefield Cup is an annual chess tournament held in Saint Louis, Missouri, United States.

The Grand Chess Tour is an annual series of chess tournaments held in different cities around the world.

Norway Chess is an annual chess tournament held in Norway.

The National Chess Championship is an annual chess tournament held in India.

The China Chess League is an annual chess tournament held in China.