The New Sudoku Players' Forum

[JC Sims]

Hello, my name is JC, and I am working on a research project involving sudoku. I was wondering does anyone have a list of all of the 9x9 sudoku boards. Or does anyone have list of all of the equivalence classes and the sizes of the classes for all 9x9 sudoku boards, or a code that will generate them. Thanks for any help that you can give.

[champagne]

I am not sure to understand what you are looking for, but we call here "solution grids" the 9x9 final value of a sudoku.

There are 5 472 730 538 ED such "solution grids".

The list depends on the canonical form used. The oldest known has been worked out AFAIK by "gsf" years ago using a lexical text minimal form for the solution grid.

Many among us have a program to create such a file. Not always in a form easy to share.

[JC Sims]

Yes, I am looking for a list of all the solution grids.

[JC Sims]

I would be happy to format the code so that it would be compatible for me. Thanks for your help

[champagne]

Hi,

The file of solution grids would be a huge file, even using a binary compressed file.
The best way is likely to get a code producing it.

Unless you have an urgent need, I can clean my code.
It would then be a windows 64 bit .exe compiled with Microsoft visual C++.

May be somebody else have a code already ready to be shared.

[m_b_metcalf]

I seem to recall that, probably on the Sudoku Programmers' Forum, gsf produced a set of CDs with 5Gbytes of data containing, in highly compressed form, all the valid solution grids. Where those CDs are now, I have no idea.

Regards,

Mike Metcalf

[Edit: well, I got some of that right, but wrong Forum and wrong medium.]

[rjamil]

Hi JC Sims,

Don't know but this thread might help to generate all 416 bands ED grids.

If you need latest gsf Sudoku solver program, please download from here.

R. Jamil