Sinquefield Cup

The Sinquefield Cup is an annual, invite-only chess tournament in St. Louis, Missouri, United States, honoring Rex Sinquefield and his wife Jeanne, the founders of the Chess Club and Scholastic Center of Saint Louis.

The first edition (working title: 2013 Saint Louis International) was held from 9 to 15 September 2013 at the Chess Club and Scholastic Center of Saint Louis in St. Louis, Missouri, United States. The four grandmasters played the classic time control 40 moves in 90 minutes with a 30-second increment as of move one, followed by 30 minutes for the rest of the game in double round-robin format. The total prize fund was $170,000, with $70,000 going to the winner, $50,000 to runner-up, $30,000 to third place and $20,000 to fourth place. The average FIDE rating for the field was 2797, the highest rated tournament at the time. The opening ceremony took place on 8 September 2013, and round 1 was held the next day. This was the last tournament for Magnus Carlsen before the World Chess Championship 2013.

The second edition was held from August 27 to September 7, at the Chess Club and Scholastic Center of Saint Louis. The 2014 edition, however, is by rating the strongest in the history of chess, as measured by actual average Elo ratings of 2802 for the six opponents, all in the top ten of FIDE's Elo rating list.

The six grandmasters again played the time control of 40 moves in 90 minutes with a 30-second increment for every move, followed by an additional 30 minutes plus the per-move-increment for the rest of the game, in a double round-robin tournament. According to the FIDE rating, the players were Numbers 1, 2, 3, 5, 8 and 9 in the world.

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