The New Sudoku Players' Forum

[civiliza]

Out of curiosity, has anybody done any work along the lines of swapping the rows, columns etc of an non-symmetric puzzle to give it a rudimentary symmetry?

Would I be right in thinking that (as long as swaps stay within chutes etc or that whole chutes are swapped) doing this would have no effect on the puzzle's difficulty? (Ignoring the fact that certain clues might be easier to see in some arrangements than in others).

[Pat]

has anybody done any work along the lines of swapping the rows, columns etc of an non-symmetric puzzle
to give it a rudimentary symmetry?

here's the old discussion --

I would need a tool that determines,
if there is a symmetrical equivalent to a given puzzle

gsf's software has this option --

Grid symmetrized to largest dihedral order,
"assymmetric" if no symmetry
(not a fast implementation).

-f%#sc

[civiliza]

Thanks for the link Pat, apologies for not responding sooner but time has been a bit tight of late.

Will look at the thread when I have got the time to concentrate on it