back to square one

”back to square one”
If you are back to square one, you have to start working on a plan from the beginning because your previous attempt failed completely
ناچار به از سرگیری کار، رفتن به خانه اول
Example 1: If this doesn’t work we’re back to square one
Example 2: If this guy rejects our offer we’ll have to go back to square one and start the whole recruitment process again