Drupple Sudoku

Yes, the 'check my work' is only lookin at one solution. After many game, I have never, deviated from the expected solution withou it being a mistake. If you could send me a screenshot of what you think is a second viable solution it would be helpful - michael.keating@inbox.com. Many thanks :)

The 'check my work' button seems to only show conflicting entries, not deviations from the solution. There is often more than one solution set that will fit the fixed numbers without showing as having any errors, but no 'clean run' if you use the wrong one, and there's no way to tell which one is right except by looking at the solution, which also means no 'clean run'.

Btw - there should never be two solutions. If you think you found a another solution, it may be that there's an error in your work somewhere.

I'm not sure I understand your concern, cubefarmer. This just follows standard Sudoku rules.

Only one major flaw; if the puzzle has more than one viable solution the game only accepts one particular and you lose if you follow another.