Created attachment 179312 [details] PDF generated from "print to file", showing a 4x4 killer sudoku puzzle with two valid solutions, only one of which is accepted by KSudoku SUMMARY I created a 4x4 killer sudoku game in "very easy" mode, and when I got down to the last (central) 2x2 area, there were clearly two possible solutions. Entering the "wrong" one causes KSudoku to reject the solution and marks those cells in error. STEPS TO REPRODUCE 1. Generate lots of 4x4 killer sudoku games 2. Solve them 3. Repeat until one with multiple valid solutions is generated 4. Try the different solutions and note that only one (arbitrary) solution is accepted. OBSERVED RESULT Ambiguous puzzle is generated. EXPECTED RESULT Puzzles should be generated with exactly one correct solution. SOFTWARE/OS VERSIONS Linux/KDE Plasma: 6.9.3-76060903-generic KDE Plasma Version: 5.24.7 KDE Frameworks Version: 5.92.0 Qt Version: 5.15.3 ADDITIONAL INFORMATION PDF attached with a printout of the ambiguous puzzle. The centre area can be: ``` 2 3 3 2 ``` or ``` 3 2 2 3 ```
As soon as I reported this, I realised that the dark-bordered 2x2 boxes can only contain each number once, which rules out the other "valid" solution. Closing this because it's obviously not a bug... my bad!
(In reply to Oisín Mac Fhearaí from comment #1) > As soon as I reported this, I realised that the dark-bordered 2x2 boxes can > only contain each number once, which rules out the other "valid" solution. > Closing this because it's obviously not a bug... my bad! I think this is exacerbated by the themes which don't seem to make those regular grid sections clear... but it is clear in the PDF.