Can you solve Britain’s spy agency Christmas card brainteaser?
<p>Britain’s intelligence and security agency – GCHQ – has released a Christmas card with a twist this year. Instead of the usual festive greetings of snowmen and Santa Claus, GCHQ has given out a baffling brainteaser.</p>
<p>This year spy agency director Robert Hannigan sent out a complex grid-shading puzzle inside his traditional Christmas cards.</p>
<p>Those who successfully uncover an image in the grid will go onto the next stage of tougher challenges. Mr Hannigan asks players who complete all the stages to submit their answer to <a href="http://www.gchq.gov.uk/pages/homepage.aspx" target="_blank"><strong><span style="text-decoration: underline;">GCHQ website here</span></strong></a> by the end of January.</p>
<p>Print out a version of the <a href="http://www.gchq.gov.uk/SiteCollectionImages/grid-shading-puzzle.jpg" target="_blank"><span style="text-decoration: underline;"><strong>puzzle here.</strong></span></a></p>
<p>How to play:</p>
<ul>
<li>Each square is either black or white. Some of the black squares have already been filled in for you.</li>
<li>Each row or column is labelled with a string of numbers. The numbers indicate the length of all consecutive runs of black squares and are displayed in the order that the runs appear in that line. For example, a label "2 1 6" indicates sets of two, one and six black squares, each of which will have at least one white square separating them</li>
<li>Complete the grid with a black pen</li>
</ul>
<p><img width="620" height="701" src="http://i.telegraph.co.uk/multimedia/archive/03522/Capture_3522150b.jpg"/></p>
<p><strong>Related links: </strong></p>
<p><span style="text-decoration: underline;"><strong><a href="http://www.oversixty.co.nz/lifestyle/family-pets/2015/11/funny-things-grandkids-say-part-4/"><em>The funniest things grandkids kids say</em></a></strong></span></p>
<p><span style="text-decoration: underline;"><strong><a href="http://www.oversixty.co.nz/lifestyle/family-pets/2015/11/sacrifices-grandparents-make-study/"><em>The many things grandparents sacrifice for their family</em></a></strong></span></p>
<p><span style="text-decoration: underline;"><strong><a href="http://www.oversixty.co.nz/lifestyle/family-pets/2015/11/interspecies-animal-friendships/"><em>15 unlikely friendships that will melt your heart</em></a></strong></span></p>
