GCHQ Codebreakers Wanted: Do You Have the Cunning to Solve Britain's Toughest Spy Puzzle?

Your mission, if you choose to accept it, is to unravel the diabolical puzzle set by British spy agency GCHQ and a sly cryptographer known only as ‘Colin’. The challenge (actually seven challenges in one) is deviously designed to test codebreaking, math skills, and analysis - with each conundrum more difficult than the last.

The mind-boggling puzzles have previously been sent in a holiday greeting card to GCHQ’s international partners - including America’s NSA and Canada’s CSE - but amateur codebreakers also love the challenges and solutions are provided on social media. This year, the Government Communication HQ is taunting 11 to 18-year-olds to prove their code-breaking prowess and, to assist, SPYSCAPE has prepared a tip sheet (below) for those who want to excel.

Your odyssey begins now. Isn’t it time to teach 'Colin' a lesson? 

‍

‍

GCHQ Puzzle Hints

If you need a few hints, GCHQ's Chief Puzzler ‘Colin’ can take you through the steps of solving the challenge in the video below.

Basically, each question has a one-word answer that can follow the word ‘Christmas’. Once you solve those seven questions, you’ll need to use the design on the front of the card (above) to insert certain letters into the grid at the bottom of the card (below). When you do so, you’ll reveal the final answer and GCHQ’s special message.

‍

Hint 1 - Teamwork is key. Bringing together different minds with different skills will give you the best chance at solving the challenge. If you’re stuck, check social media and #GCHQChristmasChallenge to ask ‘Colin’ for assistance or further hints. 

‍

Bletchley Park / Enigma Hint‍

Hint 2 - Here’s another hint to get you started: The 2023 challenge has a more historical theme than in previous years featuring Bletchley Park - the WWII HQ for the British Government Code and Cipher School. It's also where codebreakers including Alan Turing broke the diabolical German Enigma code.

‍

‍

‍

Puzzles for problem-solvers

GCHQ stands for the Government Communications Headquarters, the British eavesdroppers who are experts at SIGINT (signals intelligence) much like the US National Security Agency (NSA). 

GCHQ sells puzzle books to raise money for charity but the annual puzzle is also a recruitment tool: “It is a way of attracting to GCHQ the kind of problem solvers that we want in the department - the lateral thinking and ingenuity that’s needed to solve our puzzles,” Colin has said in previous years. The same type of problem-solving skills required for code-breaking also apply to data analysis, he added. 

A few years ago, an amateur cryptologist won a GCHQ contest for solving a particularly difficult puzzle set out in a national newspaper, Colin recalled: “The winner of that did subsequently join the department and is now one of the people that assists in setting puzzles.”

‍

‍

GCHQ 2023 Codebreaking Challenge

GCHQ created cryptic crosswords, hidden codes, and other brain-teasers to assess the aptitude of potential WWII code-breakers who worked out of Bletchley Park.

Rejuvenated by recruits including Alan Turing, GCHQ has since become an international agency in partnership with the US and Commonwealth countries.
‍

____________________________________________________________________________________

Answer to the GCHQ 2023 puzzle

The answer to the 2023 GCHQ challenge can be found here.