What? Where? When? (Russian: Что? Где? Когда?, translit. Chto? Gde? Kogda?; ChGK) is an intellectual game show well known in Russian-language media and other CIS states since the mid-1970s. Today it is produced for television by TV Igra on the Russian Channel One and also exists as a competitive game played in clubs organized by the World Association of Intellectual Games. Over 50,000 teams worldwide play the sport version of the game, based on the TV show.