Type in the digits you have, press Solve, and the full solution appears immediately.
How to use it
Enter the known digits (the clues) into the 9×9 grid above.
Press Solve and the remaining cells are filled in for you.
Press Clear to start over.
If the grid you entered has no solution, you'll get an error, usually a sign of a typo or a digit repeated in a row, column or box. If it has more than one solution, the solver says so, which normally means a clue is missing.
Use it as a teacher, not an answer key
The most useful way to run the solver is not to reveal the whole grid. Enter your position mid-puzzle to check that everything you have placed so far is still consistent, or uncover one cell and then work backwards to understand why that digit was forced. Used that way it turns a dead end into a lesson.
Sudoku20