GCHQ Christmas Challenge

The first of our publicly-released Christmas Challenges in 2021. Director GCHQ's card teamed up with the GCHQ puzzling experts to set the public the first of a set of annual festive brainteasers.

You were tasked with solving the seven puzzles, which increase in difficulty as you progress, before linking each answer to the glowing node on the tree that best matches the question or answer. Once that is complete, you need to discover the hidden message.