‘Strict continuity’ - On the set of Dr Strangelove (Kubrick, 1964), a game engaged with George C. Scott (see here)

When you’re making a film you have to make most of your decisions on the run, and  there is a tendency to always shoot from the hip. It takes more discipline than you might imagine to think, even for thirty seconds, in the noisy, confusing, high-pressure atmosphere of a film set, But a few seconds’ thought can often prevent a serious mistake being made about something that looks good at first glance. With respect to films, chess is more useful preventing you from making mistakes than giving you ideas. Ideas come spontaneously and the discipline required to evaluate and put them to use tends to be the real work.
— Stanley Kubrick, interviewed by Michel Ciment, in ‘Kubrick: The Definitive Edition’ (Macmillan, 2003)

photo from: blog.chess