The New Sudoku Players' Forum

[Smythe Dakota]

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

Bill Smythe

[denis_berthier]

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

[Smythe Dakota]

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