GCHQ sends out Christmas card featuring challenging festive brainteasers – can you solve the puzzles? | The Sun
GCHQ Christmas quiz: Here are the answers to the puzzle no one could solve | Metro News
Can you solve GCHQ's Christmas card puzzle? - BBC News
Meet a man who solved GCHQ's Christmas puzzle - BBC News
GCHQ release fiendishly difficult Christmas posers they don't expect you to solve | Daily Mail Online
GCHQ's Christmas card puzzle: Can you outsmart an 11-year-old?
The #GCHQChristmasChallenge is here! - GCHQ.GOV.UK
GCHQ reveals answers and winners of Christmas puzzle | The Week UK
GCHQ's 2021 Christmas Challenge (aimed at 11-18 year olds :P) : r/puzzles
Christmas puzzle from GCHQ released - can you break the code and decipher the message? - Cambridgeshire Live
GCHQ's Fiendish Christmas Puzzle Book for 2016 – A licence to puzzle | Intervirals
GCHQ sets its 2020 Christmas card challenge - GCHQ.GOV.UK
Can you crack the GCHQ Christmas card code? | The Week UK
GCHQ: Nobody got crypto Christmas puzzle correct | WIRED UK
Solving the GCHQ Christmas Puzzle with Sentient
Can you solve GCHQ's Christmas puzzle? Director Jeremy Fleming releases his annual conundrum - Gloucestershire Live
GCHQ Christmas Puzzle solution: How to solve the brainteaser - and the four further parts of the puzzle it unlocks
GCHQ sets its 2020 Christmas card challenge : r/puzzles
GCHQ unveils annual Christmas card puzzle - can you solve it? | The Week UK
GCHQ sends out brainteaser Christmas card - can you solve the festive puzzles? | UK News | Sky News
Britain's GCHQ spy agency releases Christmas puzzle for kids - CNN
GCHQ's cryptic Christmas card will help hone your code-breaking skills
GCHQ Christmas Puzzle Solutions Part 1 — alaricstephen.com
Cyber Matters: How To Solve The GCHQ Christmas 2015 Puzzle (Possibly?)
Solving the GCHQ christmas card with Python and pycosat - Matt's Ramblings
