In the game, each player switches roles during each iteration of the scene. The intent is to allow for a complete exploration of the scene with different viewpoints and inputs. While play proceeds in structured phases it is otherwise free-form.
This version of the game requires exactly three players. It differs from the two-player version by making the "game master" role separate from the two players. This makes the game less intimate but also encourages more rigor in play as a "third-party" judge must approve the improvisation.