Nerdsnipe: Consider the 4x4 analogue of Sudoku. Treat permutations of the 4 symbols as equivalent, and rotations and reflections as equivalent. Try to solve this problem *entirely in your head* (e.g. without pencil and paper): Is there more than one distinct solution?
Hm. *Thinks.* Still working in my head, I believe my proof generalizes, & there remains more than one solution taking into account the extra 4 symmetries and 16x isomorphisms.
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I can confirm there are at least 2 distinct solutions even with this (dunno if there are more). Did that with pencil and paper though!
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I guess it was a pretty successful nerdsnipe after all, even if not as originally intended...
End of conversation
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