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!
Puzzlr 10: Block universe
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From New Scientist #3611, 5th September 2026 [link] The goal is to divide
the grid into non-overlapping rectangles. Each rectangle must contain
exactly one...
