if grilleTest == grille:

        grilleBack = copie(grille)

        for i in range(9):

            for j in range(9):

                if not grilleFinie[i][j] and cellBack[2] > len(grille[i][j]):

                    cellBack = [i,j,len(grille[i][j]),grille[i][j]]

        for n in cellBack[3]:

            grille[cellBack[0]][cellBack[1]] = n

            if chercher(ee+1,iterations):

                return True

            else:

                grilleFinie = [[False]*9 for n in range(9)]

                grille = copie(grilleBack)

                verifier()

        return False  

    else:

        iterations += 1