Sudoku uniqueness checker
A sudoku with two solutions earns 1-star reviews. Paste one and find out in a second.
Free · no accountYour input
81 digits, 0 or . for blanks
Exactly one solution
Checked by a full solver.
Your grid
- Givens
- 30
- Grade
- Medium · estimated from the givens
- Valid givens· No digit repeats in a row, column or box.
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