Fabiano Caruana, the American world number two whose calculating precision is often likened to a computer, meets Levon Aronian in a matchup that carries all the hallmarks of a great rivalry. The Scotch Game — revived by Kasparov in the 1990s and later adopted by Carlsen — is Caruana’s weapon of choice here, seeking a direct opening edge from move one. A compelling clash between the technician and the artist.