I believe it was a TV show, not a movie.
Two men, older, are having either a staring contest or a “keep as still as you can” contest, where they can not move or talk. It’s been going on for a really long time. Finally, one of the men moves.
The other man, the winner, looks at the chess board that has been in the room the entire time. He takes a piece, moves it, and says, “Check mate.”
When asked how he did that, he tells another character that during the contest, he had been looking at the chess board calculating every move possible and figuring out if any mate possibility existed.
What was this from? Probably late 80’s or early 90’s.
