The Sinquefield Cup is an annual, closed chess tournament hosted by the Saint Louis Chess Club in St. Louis, Missouri, United States.
It was first held in 2012 as a four-player round-robin tournament. In 2015, it became part of the Grand Chess Tour. In 2016, it was the Tour's third leg and the first slow time control event of the tour.[1]
The tournament was started by billionaire Rex Sinquefield as part of his efforts to boost U.S. chess and turn St. Louis into an international chess center.[2]