go back to square one

Translations
вернуться к началу
After the project failed, we had to go back to square one.
После провала проекта нам пришлось вернуться к началу.
Definitions
To return to the starting point of a process or activity, usually because a previous attempt has failed or produced no results.
Words
go

verb
вернуться
back

adverb
назад
to

preposition
к
square

noun
квадрат
one

numeral
один