The Sinquefield Cup kicks off Monday in St. Louis with ten of the world's best locked in a round-robin battle. Caruana, So, Giri, Aronian, and Praggnanandhaa lead a loaded field that includes rising stars Sindarov, Keymer, and Sevian. This isn't a side event. The classical 90-minute format separates the pretenders from contenders fast. Whoever emerges from this gauntlet claims serious rating points and bragging rights in one of chess's most prestigious tournaments.