Step-by-step sudoku solver

This solver allows you to solve classic sudoku puzzles of size 9 by 9, like a human would, with a detailed step-by-step solution.

If you want to get the solution of one of the sudokus of the site, enter its number, which you can find just above the grid.
Sudoku grid number

Otherwise, enter a string of characters containing the values for each cells in the grid, starting with the cell at the top left, then continuing from left to right and from top to bottom, replacing the empty cells with 0.
Example : 053000900060015000000906300200000070401008090006007000500080000008400260040002080