Last weekend, Magnus Carlsen successfully defended his title as World Chess Champion, defeating challenger Vishy Anand in 11 games. Meanwhile, in St. Louis, the U.S. number one, Hiraku Nakamura, took on Levon Aronian of Armenia in an exhibition match. Aronian has been number two or three in the world for several years now and was the guy everybody expected to be playing Carlsen for the WCC in 2014, before he sort of fell apart at the Candidates Tournament.