Sorry yes, the current ones are step-wise reduced to be as difficult as possible but still solvable but I still haven't been able to get that coveted five stars for difficulty. :)
Thanks. For Mystifier. I have the impression that the number of stars indicates the program rather automatically calculating by the ratio of white and black squares picture.
For Mystifier. I have the impression that the number of stars indicates the program rather automatically calculating by the ratio of white and black squares picture.