GCHQ 2020 Christmas card

GCHQ have made their Christmas Card available to the public

“The card is sent by our Director Jeremy Fleming to colleagues and partners across the world, but we’re also sharing the brainteaser with you for to enjoy over the festive season.”


To solve it, you’ll need to complete a number of incomplete letter sequences before plotting your answers on a special Christmas bauble to reveal a hidden message.

The letter sequences are:

A copy of the card is available at

GCHQ 2020 Christmas Card (pdf)

SPOILER – This is my solution:

GCHQ Christmas Card Puzzle – My Solution (pdf)

Spoiler – GCHQ Official Solution

2020 Christmas Card GCHQ Solution (pdf)