How is “back to square one” used?

In Dave Chappelle: The Closer (2021), one line is: “And now, we're right back to square one, aren't we?”

Which movie is “back to square one” from?

The clip at the top of this page is from Dave Chappelle: The Closer (2021).

a return to the situation you were in at the beginning of a project, task, etc., because you have made no real progress

Heard in 4 moviesPlay Idioms

Oxford100% of films
a return to the situation you were in at the beginning of a project, task, etc., because you have made no real progress
We are right back to square one.
So we're back to square one, only now we are all wanted by the CIA.

Definitions from the Oxford Advanced Learner's Dictionary, 9th edition

And now, we're right back to square one, aren't we?

Said in 7 films · #1