Directors like Satyajit Ray, Rossellini, Bresson, Buñuel, Forman, Scorsese, and Spike Lee have used non-professional actors precisely in order that the people we see on the screen may be scarcely more explained than reality itself. Professionals, except fo the greatest, usually play not just the necessary role, but an explanation of the role.
The song is about knowing the end result of every situation you're in, and being able to play it out in your mind and see it before it happens. It's about addiction, really, about knowing how it's all going to end up. In that sense, you're watching a movie of yourself all the time - and then you want out of that movie.
The majority of people imagine a chess master as being a townsman who passes his life in an atmosphere of smoke and play in cafes and clubs: a neurasthenic individual, whose nerves and brains are continually working at tension: a one-sided person who has given up his whole soul to chess.