Does Sudoku Have Multiple Solutions?
Learn when Sudoku can have multiple solutions, why good puzzles should have one, and how to check a questionable grid.
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The practical answer
A proper Sudoku puzzle should have exactly one solution. If it has multiple solutions, the clues are not restrictive enough.
- Use a solver to validate questionable grids.
- Avoid guessing when a puzzle is well formed.
- Use generated puzzles when you need a unique solution.
Where to go next
If you are ready to act on this, use the main Pure Sudoku page built for this intent: Does Sudoku Have Multiple Solutions?.
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