The game is played through an exchange of moves - once per day, against the chessmaster (an apparition that is an extension of the artifact). The moves are simulated through an ability score check, the first always being the intelligence check. Subsequent checks are determined by a d6 roll, and take time to complete: * Intelligence (1-2): An exchange that takes 10 minutes * Charisma (3-4): An exchange that takes 10 mintues * Constitution (5-6): An exchange that takes 1 hour. Characters playing the game are in a cataconic state and ignore their surroundings.