Warp wrote:
>   Thinking about it, in fact I think the only requirement for a sudoku
> puzzle to be rational is that it must have only one possible solution.
> As far as I understand, all sudoku puzzles are like that.

I think that while it may be a rule that's the case, it isn't the case that 
such is mathematically guaranteed. In other words, I expect that it's not 
hard to make a sudoku puzzle with multiple solutions, but people don't make 
them like that because that takes the fun out of it?

-- 
   Darren New, San Diego CA, USA (PST)
   "Ouch ouch ouch!"
   "What's wrong? Noodles too hot?"
   "No, I have Chopstick Tunnel Syndrome."

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