PUZZLE INPUT
FREE SUDOKU SOLVER
Bring any Sudoku.
We’ll verify the logic.
Enter a puzzle from a newspaper, book or another screen. The solver checks validity and uniqueness before revealing a certified solution.
What this solver checks
Rows, columns and boxes are checked before solving.
A puzzle with zero or multiple solutions is flagged instead of being treated as valid.
The same Phase-3 human-technique engine used by the game grades the puzzle.