Looking for really hard sudoku puzzles

[NeoPa]

I see the circles Jos ;)

I guess we can agree to view things from different perspectives huh.

[JosAH]

I see the circles Jos ;)

I guess we can agree to view things from different perspectives huh.

Yup; there's one difference though: I'm right and you're not; there are puzzles that are partially solved that don't have a unique solution (see the empty puzzle) and trying to find one by inferring feasibility rules doesn't make it ;-)

kind regards,

Jos

[NeoPa]

Yup; there's one difference though: I'm right and you're not;

Of course! How could I have been so blind? :D