The 2014 Sinquefield Cup is shaping up to be one of, if not the, strongest chess tournaments in history:
World No. 1: GM Magnus Carlsen: Accepted
World No. 2: GM Levon Aronian: Accepted
World No. 3: GM Fabiano Caruana: Accepted
World No. 5: GM Hikaru Nakamura: Accepted
World No. 6: GM Sergey Karjakin: Invited
World No. 8: GM Maxime Vachier-Lagrave: Accepted
