I've turned comments off on this blog as I'm getting quite a lot of spam. I've been able to keep on posting on flickr but haven't the time and energy to manage to be an active blogger. Sorry not to have been visiting your blogs.
My best wishes to you all!
Update: Comments are back on and I'm back!
Enigma 729: Obey the instructions
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From New Scientist #1884, 31st July 1993 [link] You will need to make six
cards labelled P, Q, R, S, T, U and each with an instruction on it as
follows: Ca...