I've noticed a few chess scenes in a couple of movies I've watched recently. Funnily enough they were both Westerns, although the 'serious' Western seemed to have 'bad chess' while the non-serious one, seemed to get it right.
The non-serious Western was Blazing Saddles. There is a scene where Sheriff Bart plays the Waco Kid in chess, and while there is some debate about whether the final position is really checkmate, it looks as though they got most things right.
The other Western was No Name on the Bullet, starring Audie Murphy. Early in the movie his character, a hired gun, plays chess against the town doctor. However I am pretty sure that the board was set up the wrong way, as it seemed that Murphy (as black) had his Bishop on g8, and his Knight on f8. This probable error was highlighted when he played Ng6. Having decided that such an error was going to bug me for the rest of the film, I of course found something else to watch.