Fill in sudoku to solve using digits 1-9, leaving empty cells blank (anything other than 1-9 will be converted to an empty cell for solving). Press the "Solve Sudoku" button to have a solution displayed. Repeated Solve-Back-Solve may give different solutions if the starting grid has more than one solution. If there is no solution, or the starting position is invalid, the solution will be displayed as a table full of "-1".
Enter the sudoku puzzle you wish to solve and press the Solve Sudoku button
PHP Sudoku Solver Version 1.2.0 - September 2023
P.J. Harrison, Canberra Australia