Quote:You only need the white blocks to be set for completion.
Yep that was what I assumed with your first post, then I started wondering why 2 shades of dark. Glad you made the change, the player can then focus on the runs of white.
I've yet to encounter an unsolvable. I suppose with higher numbers it gets much harder to place the smaller runs.
But I think if you match all the runs on rows and cols you will have solved the puzzle even if more than one solution exists.
The way I set it up, you only have to match all runs in the rows and cols, there is only that pattern saved as solution.
I will check your latest out, maybe figure a way to expose a picture?
b = b + ...