From Newsgroup: rec.puzzles

GCHQ releases annual Christmas Challenge 2025 with puzzles designed by schoolchildren and spies...

To mark a decade of festive puzzles, our in-house puzzlers have
masterminded seven fiendish brainteasers and teamed up with schoolchildren
on three festive designs.

https://www.gchq.gov.uk/news/gchq-christmas-challenge-2025

If anyone wishes to join in, but like me is struggling to read the
questions, then I have a version with slightly higher contrast.
--
David Entwistle
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