
Online, chess programs provide running commentary, evaluating which player is ahead and whether the move he or she is making is brilliant or a blunder. Chess pieces are embedded with magnetic sensors that transmit their location on the board to a computer, which relays this information to the Internet.

But the game has changed in at least one fundamental respect: it is now monitored, and even shaped, by computers. It’s still quiet enough at a tournament that, among the spectators, you can hear your neighbors’ breathing. Flanking attendants, called arbiters, make sure that nobody cheats.

Players land their pieces with the delicate thump of baize on wood, then jot their moves on scoresheets and tap the clock forcefully, or gently, depending on the mood they wish to communicate to their opponents. In many ways, tournament chess is still played very much as it was a century ago. 1 in the global chess rankings last year. Magnus Carlsen, a twenty-year-old Norwegian, first rose to No.
