The 4th edition of the Zurich Chess Challenge will be decided by Caruana, Anand, Kramnik, Aronian, Nakamura and Karjakin playing five rounds of classical chess on 14-18 February followed by another five rounds of rapid on 19 February. Wins (2 points) and draws (1) count double for classical games, with a draw before move 40 “punished” by an extra rapid game. The classical time control is 120 minutes for 40 moves plus 60 minutes for 20 moves plus 15 minutes to the end of the game, with a 30 second increment from move 61. Rapid is 15 minutes plus a 10 second increment from move 1. All the action from the Savoy Baur en Ville Hotel can be followed live on chess24 and the official website