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Sudoku Solver with Steps
A step-by-step Sudoku solver that shows every move and names the technique behind it — naked singles to X-Wing — so you understand the solution instead of just seeing the answer.
See every deduction, not just the answer
Enter your puzzle and press Solve step by step. The solver walks the solution one move at a time, highlighting the cells and candidates involved and explaining each in plain English: "Hidden single — only this cell in the box can take a 5." Use Back, Next or Auto-play to move at your pace.
Every technique, linked to a guide
Each step names the exact technique it uses — naked single, hidden single, locked candidates, naked pair, hidden pair, X-Wing, Swordfish, XY-Wing — and links to a full strategy guide with worked examples, so the solver doubles as a way to learn.
Honest about hard puzzles
If a board needs a technique beyond the standard set, the solver says so rather than showing a wrong move, and offers the complete solution. You will never be shown a deduction that does not actually follow.
Prefer to practise? Pick a level — easy, medium, hard or expert — or read the strategy guides. Other tools: solver, photo scanner, hint and checker.