I don't think that many people today, understand the nature of what an improv does for an actor in a specific setting. What an improv does for an actor is help him find the life; it's the life that an actor's after.
You can't overestimate the importance of psychology in chess, and as much as some players try to downplay it, I believe that winning requires a constant and strong psychology not just at the board but in every aspect of your life.