Strange similarity

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Strange similarity

Postby Smythe Dakota » Fri Dec 26, 2014 6:55 pm

Does anybody notice any similarity between ATK medium puzzles M62841 and M62851?

Bill Smythe
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Re: Strange similarity

Postby denis_berthier » Fri Jan 02, 2015 5:24 am

Smythe Dakota wrote:Does anybody notice any similarity between ATK medium puzzles M62841 and M62851?
Bill Smythe

Hi Bill,
Yes, as all their puzzles, they go by families: the last 2 digits mean some isomorphism in the family. For details, see:
can-you-solve-this-without-trial-and-error-t30960-181.html
denis_berthier
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Re: Strange similarity

Postby Smythe Dakota » Thu Jan 08, 2015 2:06 pm

Hmm, I guess 2 digits would indeed be required to cover all the isomorphisms. As far as I can think, all isomorphisms are either horizontal reflections, vertical reflections, 90-degree rotations, digit reversals (1<-->9, 2<-->8, etc), or combinations of these. This means that each puzzle would come in a package of 16 mutually isomorphic puzzles.

Bill Smythe
Smythe Dakota
 
Posts: 534
Joined: 11 February 2006


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