The Chess World Cup is the name given to a number of different chess tournaments. The format and significance of the tournaments has changed over the years.
In 1988-99, the Grandmasters Association organised a series of six high-ranking World Cup tournaments in the form of a 'Grand Prix'.
In 2000 and 2002 FIDE, the World Chess Federation, staged their "First Chess World Cup" and "Second Chess World Cup" respectively. These were major tournaments, but not directly linked to the World Chess Championship. Both the 2000 and 2002 events were won by Viswanathan Anand of India.
Since 2005, a different event of the same name has been part of the World Chess Championship cycle. This event is being held every two years. It is a 128-player knockout tournament, in the same style as the Tilburg tournament from 1992-94, or the 1998, 1999, 2000, 2002 and 2004 FIDE World Championships.
The event was held in 2005, 2007, 2009, and 2011 in Khanty-Mansiysk, and subsequently FIDE has given preference to bids for the Olympiad that also contain a bid for the preceding World Cup. During the 2015 finals of the World Cup, the main organizer commented "We received the right to host the Olympiad and then we were given an additional event - the World Cup."
The Chess World Cup 2005 qualified ten players for the Candidates Tournament for the World Chess Championship 2007. This event was won by Armenian GM Levon Aronian. The Chess World Cup 2007 qualified one player for the next stage of the World Chess Championship 2010. This event was won by American GM Gata Kamsky.
The Chess World Cup 2009 qualified one player for the World Chess Championship 2012 cycle, Israeli GM Boris Gelfand won this event. The Chess World Cup 2011 qualified three players for the World Chess Championship 2013 cycle, Russian GM Peter Svidler won this event. The Chess World Cup 2013 qualified two players for the World Chess Championship 2014 cycle, Russian GM Vladimir Kramnik won this event.
|Year||Dates||Host||Players||Qual.||Winner||Runner-up||Third place||Fourth place|
|2000||1-13 Sep||Shenyang, China||24||-||Viswanathan Anand||Evgeny Bareev||Boris Gelfand and Gilberto Milos|
|2002||9-22 Sep||Hyderabad, India||24||-||Viswanathan Anand||Rustam Kasimdzhanov||Alexander Beliavsky and Alexey Dreev|
|2005||27 Nov - 17 Dec||Khanty-Mansiysk, Russia||128||10||Levon Aronian||Ruslan Ponomariov||Étienne Bacrot||Alexander Grischuk|
|2007||24 Nov - 16 Dec||Khanty-Mansiysk, Russia||128||1||Gata Kamsky||Alexei Shirov||Magnus Carlsen and Sergey Karjakin|
|2009||20 Nov - 14 Dec||Khanty-Mansiysk, Russia||128||1||Boris Gelfand||Ruslan Ponomariov||Sergey Karjakin and Vladimir Malakhov|
|2011||26 Aug - 21 Sep||Khanty-Mansiysk, Russia||128||3||Peter Svidler||Alexander Grischuk||Vassily Ivanchuk||Ruslan Ponomariov|
|2013||10 Aug - 4 Sep||Tromsø, Norway||128||2||Vladimir Kramnik||Dmitry Andreikin||Evgeny Tomashevsky and Maxime Vachier-Lagrave|
|2015||10 Sep - 5 Oct||Baku, Azerbaijan||128||2||Sergey Karjakin||Peter Svidler||Anish Giri and Pavel Eljanov|