Sudoku solver: get help and learn the techniques
Enter your puzzle and get the next step explained, with the technique behind it and why it works.
Try an example:
How the solver works
Click a cell and enter the digits from your puzzle, or load an example. The solver finds the next logical step, highlights the pattern on the grid and explains the technique behind it. You can also analyze the entire puzzle to see exactly which techniques you need, from Naked Single to X-Wing and Simple Coloring.
Learn the techniques behind each step
If you want to learn to solve sudoku on your own, each technique has its own page with interactive examples you can work through step by step, a procedure for your own puzzles and the most common mistakes to avoid. All techniques are collected in the overview, ordered by difficulty level from Easy to Brutal.
See all sudoku techniques