[BobK]

I won't answer your question, because curmudgeon's waiting for you to.

But I'll just add that there's an informal idiom - 'to crack it', used between people who know what 'the problem' is, and who therefore know that it refers to the problem.

So 'crack it' = 'crack the problem' (or decipher a code or guess a password). But we still don't know what 'crack the problem' means. Nyggus?