Isomorph

Everything about Sudoku that doesn't fit in one of the other sections

Isomorph

Postby Papy » Sat Jun 30, 2007 7:21 am

Hi everyone, (GSF?)

I'm back with a little questions

How compute the number opf isomorph for one grid
I a'm looking after the way to compute the number not the numbner itself

Thanks

Papy
Papy
 
Posts: 131
Joined: 15 August 2006

Postby Red Ed » Sat Jun 30, 2007 12:39 pm

To find the number of automorphisms of a solution grid, i.e. the number of ways of "scrambling" the grid back to itself, you can loop over all 648 ways of preserving a "base pattern" and make a note of which of those preserves the whole grid. For further information, see here.
Red Ed
 
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