Sudoku Solver : even diabolical ones will not resist !

Enter your numbers in the Sudoku grid
If more than one solution is possible, only the first one will be displayed

I wrote this solver in PROLOG, be kind with it : depending on the server load, the answer may take a few seconds.

Please note that I heard about Sudoku only 2 days before writing the solver, I'm not a player and I never tried to solve a Sudoku by hand !

The solver does not find the solution ? you are SURE there is one ?

Please report it to me !