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!
BrainTwister #64: Matching tiles
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From New Scientist #3534, 15th March 2025 [link] [link] A game is played
with a set of tiles. Each tile is one of three shapes (circle, triangle or
square)...