Feature request: user-defined lock of selected circles, similar to how the existing red circles are locked.
(This is like the Minesweeper flag option)
(This is like the Minesweeper flag option)
If you start adding any automated processing like that, then you're only a couple more processes away from the game just solving itself without you.
The elegance of this implementation is that you are doing all the solving. Unless you specifically ask for help from the hint button.
Regarding the hint button. I don't want to use it precisely because I don't want to "win" by repeatedly getting hints.