[–] dave333 1y ago ↗ Link is to BBC article. Direct link to puzzle PDF is https://www.gchq.gov.uk/files/GCHQ%20Christmas%20Challenge%2... [–] [dead] samayk60 1y ago ↗ [dead]
[–] gnabgib 1y ago ↗ Small discussion (15 points, 3 days ago, 4 comments) https://news.ycombinator.com/item?id=42385929
3 comments
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