I thought this was going to be solved using the collective intelligence of Hacker News and Reddit but it seems that with only 2 days to go, there has not been a successful completion of all stages.<p>GCHQ director Robert Hannigan, who set the string of teasers, offered a clue: &quot;It&#x27;s not as abstract as you think.&quot;<p><a href="http:&#x2F;&#x2F;www.bbc.co.uk&#x2F;news&#x2F;uk-35429971" rel="nofollow">http:&#x2F;&#x2F;www.bbc.co.uk&#x2F;news&#x2F;uk-35429971</a>