GCHQ’s chief puzzler, known only as Colin, added: “This year’s Christmas challenge features seven puzzles designed to test everything from codebreaking and mathematical analysis to lateral thinking ...

Fans of codebreaking, maths and brainteasers can now try their hand at the latest cryptic Christmas challenge set by GCHQ, the UK's intelligence agency. GCHQ released its annual Christmas card on ...

The spy agency's "Chief Puzzler" said the notoriously tricky puzzles are designed to test "the same blend of skills our teams use every day to keep the country safe” ...

For James Bond, it would be child's play. But do you have what it takes to crack the code in GCHQ's fiendish Christmas card puzzle? GCHQ's in-house puzzlers set to work on seven fiendish brainteasers ...