And what about a sudoko generator with a pertinent notion of level for a 
human ? Would be nice if you could choose the cases that are filled from 
start ...


a start for level for problems with a unique solution :

- negative level -n : number of times where you have to do deep 
reasonning (guesses) because you do not have an immediate choice.

- positive level n : minimum of the number of cases that can be filled
by an immediate choice on all branch ?

These are not formal definition ... yet, but using a representation of 
the problem as a set of close, I think we can do something with the 
complexity of the proof search ...

just for fun ...



-- 
Christophe Raffalli
Université de Savoie
Batiment Le Chablais, bureau 21
73376 Le Bourget-du-Lac Cedex

tél: (33) 4 79 75 81 03
fax: (33) 4 79 75 87 42
mail: Christophe.Raffalli@univ-savoie.fr
www: http://www.lama.univ-savoie.fr/~RAFFALLI
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