Sudoku Solver
Enter your clues with the keyboard or number pad. Validation and solving stay in your browser.
Runs in your browser — nothing is uploadedArrow keys move the selection. Digits enter numbers; Delete or 0 erases. N toggles notes in the game. Clues stay fixed.
How to use Sudoku Solver
- Select cells and enter your known digits; use zero or erase for blanks.
- Validate to identify duplicate clues.
- Solve to see a solution and whether it is unique; clear for another grid.
Questions
How is difficulty determined?
Easy completes with naked singles. Medium also needs hidden singles. Hard needs up to five branching decisions; Expert needs more. This is the measured work of this solver, not a standardized human difficulty rating.
Are puzzles and progress uploaded?
No. Puzzles and solving run locally. Game progress and best times are saved only on this browser and never trigger homepage editor recovery.
Does the solver explain each step?
No. It reports actual validity and solution counts, without inventing solving explanations.