Welcome to the Sudoku Explainer!

This application can solve a Sudoku step by step, and explain at each step the technique that is used. It also allows you to get all the techniques that can be applied at any step of the solving process, and to explain and apply any of them.

To enter the Sudoku puzzle, select a cell with the arrow keys or by clicking on it. Then type the value, or click on one of the possible values. Press the spacebar or click again to clear the cell. Hold the Ctrl-key while clicking to toggle a candidate of an empty cell.

The following buttons are available: