I never heard of this previously but got sent this years challenges today. I got 4 of the 7 and was hopefully on the right lines for 2 of the others, one I was making a stupid error (then once that was pointed out I solved quick) and the other I think needs various alphabet shift ciphers and I cba to work through them. The fact they all follow the word Christmas is helpful as that narrows the pool of possible answers down considerably.
I never heard of this previously but got sent this years challenges today. I got 4 of the 7 and was hopefully on the right lines for 2 of the others, one I was making a stupid error (then once that was pointed out I solved quick) and the other I think needs various alphabet shift ciphers and I cba to work through them. The fact they all follow the word Christmas is helpful as that narrows the pool of possible answers down considerably.