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).

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

8 作品で登場 · 1 本目

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

オックスフォード映画の 100%
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.

定義：Oxford Advanced Learner's Dictionary 第 9 版