12 by 12 sudoku solver

Solve Sudoku 12x12 online

It is important to note that on the current page you can only solve the classic 12x12 Sudoku. If you need to solve Sudoku with a different grid size, simply select the desired size in the top left corner from the drop-down list.

The principle of our solver is quite standard:

1. Enter the initial numbers into the empty cells as in the Sudoku you want to solve.
2. Check if all the numbers you have entered are in the correct positions and have the correct values.
3. By clicking the "SOLVE" button, you launch the solution search algorithm. And in just a few seconds, you will see the ready solution of the 12x12 puzzle before your eyes.

Please note! If Sudoku is very difficult and the program needs more than 30 seconds to solve it, the system will ask for your email address and send the solution in an email.

Why use a helper to solve large 12x12 Sudoku?

At the moment, the algorithms of our solver do not allow showing the solution of the 12x12 Sudoku step by step. On the one hand, this is a disadvantage of our service, but on the other hand, Sudoku puzzles are designed to be solved without hints, and a solver cannot explain how to play Sudoku to you.

The main goal of this page is to input the numbers from the Sudoku you are solving and compare your result with the standard one. You can fully trust our algorithms as they have been tested hundreds of times. The program checks more than a thousand possible combinations of your Sudoku solution per second and ultimately provides the only correct one.