GCHQ Christmas puzzle 2023

[monzer]

It's that time of year again. I've only got one so far but literally just started a few minutes ago.

link here

Without giving too much away, does No.6 require a bit of musical knowledge?

 

[maz]

It's that time of year again. I've only got one so far but literally just started a few minutes ago.

link here

Without giving too much away, does No.6 require a bit of musical knowledge?

We've already been having a bit of fun with this Challenge:

Broken Link Removed

 

[Riverbankannie]

It's that time of year again. I've only got one so far but literally just started a few minutes ago.

link here

Without giving too much away, does No.6 require a bit of musical knowledge?

No - think binary 0s and 1s

 

[monzer]

We've already been having a bit of fun with this Challenge:

Broken Link Removed

Ah that's an unauthorized part of the forum for me

 

[maz]

Ah that's an unauthorized part of the forum for me

You are not allowed into the U-shaped Lounge??

^{_{Subscribers  do not see these advertisements}}

 

[monzer]

You are not allowed into the U-shaped Lounge??

No I'm on a five year cool down period

 

[maz]

No I'm on a five year cool down period

I didn't realise that being barred from the U-shaped Lounge was a punishment. I thought there was only Coventry.

I won't ask what you did.