www.argio-logic.net

here a first puzzle

waiting for your comments

Nice puzzle, as usual.
I tried to solve, but I am getting 3 valid solutions. Maybe, I am wrong somewhere.

rakesh_rai ha scritto:Nice puzzle, as usual.
I tried to solve, but I am getting 3 valid solutions. Maybe, I am wrong somewhere.

and, as usual, you are right.

there was a mistake in a routine.

here another sample, hopefully with a unique solution

Yes. This one has a unique solution. I found it fairly tough, like the iso sudoku which also has average top times around 12-13 min.