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Evening Standard
Evening Standard
World
William Mata

GCHQ Christmas Puzzle 2023: Can you solve this codebreaking challenge aimed at secondary schools?

GCHQ has released its annual effort to separate potential James Bonds from Bart Simpsons with a fiendish brain teaser. 

The #GCHQChristmasChallenge is aimed at 11-18-year-olds and more than 1,000 secondary schools are set to participate on Thursday.

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