From: James Edward Gray II <james@...>
Date: 2005-08-26T23:08:18+09:00
Subject: Re: [OT] Sudoku again: How to find a sudoku?

On Aug 26, 2005, at 1:08 AM, Ralf M�ller wrote:

> Hi out there,
>
>
> What i like to know, is how could you know, that a sudoku-like  
> number table is
> a real sudoku with only ONE SINGLE solution?

The solution I discussed in the summary does distinguish between  
multiple solution puzzles and single solution puzzles.

> The Solvers from the quiz (which I did not read) will surely find a  
> solution.
> But where did the sudokus themselves came from?
>
>
> What about a sudoku-generator? Which leads to: How to proof a  
> certain number
> table has one and only one solution?

This probably doesn't exactly answer your question, but this site  
appears to hold monthly contests:

http://www.sudoku.com/

That amounts to a new puzzle each month.

James Edward Gray II