Fans of codebreaking, maths and brainteasers can now try their hand at the latest cryptic Christmas challenge set by GCHQ, ...

The spy agency's "Chief Puzzler" said the notoriously tricky puzzles are designed to test "the same blend of skills our teams ...

The UK's intelligence, security and cyber agency creates a Christmas Challenge puzzle every year and this year marks a decade ...

GCHQ has released their annual Christmas puzzle for 2025, even providing prospective codebreakers with some hints.

Can you solve GCHQ’s Christmas puzzle? - GCHQ has come up with a range of puzzles designed to test a range of problem-solving ...

GCHQ has launched its annual Christmas challenge, featuring a new set of seven brainteasers and Christmas card designs by schoolchildren. This year's challenge marks a decade of GCHQ's festive puzzles ...

The chief ‘puzzler', Colin, said they are designed "to test everything from codebreaking and mathematical analysis to lateral thinking and creativity".

They come as part of Christmas cards with three different designs, created by children in a competition with thousands of schools. If the puzzles look too impossible, there are hints available from ...

South Wilts Grammar student wins GCHQ Christmas card design competition with puzzle-filled artwork, as intelligence agency marks 10 years of ...

The competition was organised by GCHQ, the UK's intelligence, security and cyber agency, and challenged schoolchildren to design a Christmas ...

GCHQ has unveiled its annual Christmas Challenge for 2025, challenging Britons to try and crack the code. The festive puzzle ...