Hi, I would like someone tell me something about this expression I have found reading a comic of Tintin after something have not worked very well again:

'Oh, it's back to square one again'

Thanks in advance, jo.
It means that they have to start at the beginning again. The work they already did didn't get them any closer to their goal.
I'm guessing that the phrase might have originated from the kind of board games (such as Candyland) where a player advances one square at a time, but on an unlucky throw of the dice may end up being sent back to the beginning.
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A similar term would be "back to the drawing board".
 davkett's reply was promoted to an answer.
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