
Back to square one
Failure Implication
The phrase often implies a failure to progress, requiring a fresh start.

Our experiments failed; we're back to square one.
Starting Over
It suggests starting over again, erasing all progress made previously.

The code has bugs. Looks like I'm back to square one.
Negative Emotion
It usually carries a negative emotional connotation, indicating frustration or disappointment.

With the lost contract, it's back to square one for us.
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