Post #1209868
2026-03-25 23:01 UTC
Wow, Penrose’s tetrahedron puzzle was a lot more complicated than I had imagined it to be.
https://www.youtube.com/watch?v=CD-21ytpCJU
Replies (2)
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@robinhouston@mathstodon.xyz 2026-03-25 23:12
If you want to try something similar, and you’re not put off by the report that Frank Adams’s friend took 4½ hours to solve it, which was the fastest time anyone managed, Steve Nicholls has designed a 3D-printable puzzle based on the same principle, though it is not identical to Penrose’s puzzle: https://makerworld.com/en/models/1329336-smelling-of-roses-puzzle#profileId-1367295
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@johncarlosbaez@mathstodon.xyz 2026-03-26 00:21
@robinhouston - this comment on the video is right: The first 8.5mins: the most relaxing video on the internet The last 3.5mins: the most stressful video on the internet One starts fearing the poor old guy won't be able to solve his own puzzle.