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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.
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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.
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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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Comments  
A similar term would be "back to the drawing board".
 davkett's reply was promoted to an answer.
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