Sudoku Solver Step by Step
Paste any sudoku puzzle and walk through the solution one logical move at a time, with plain-English explanations for every step.
Accepted formats: 81 characters with dots/zeros for blanks, or a 9×9 grid (spaces and newlines welcome).
How this works
- Paste any sudoku puzzle or click cells to enter one by hand.
- Click Solve step by step.
- The solver walks you through every logical move — each step names the technique (naked single, hidden pair, X-wing…) and explains why it works.
- If the puzzle requires guessing past a certain point, the walkthrough flags it explicitly rather than pretending the rest was logical.
Want to play instead? Try our free online sudoku.
Paste any sudoku puzzle below — 81 characters with dots or zeros for blanks, or a 9×9 grid pasted from elsewhere. The solver walks you through every move one logical step at a time, naming the technique that justifies each placement and explaining the deduction in plain English. Stuck on a tough puzzle? Use this to see exactly which technique unlocks the next step. Learning sudoku? Every move links to the matching strategy guide. The solver handles naked and hidden singles, pointing and claiming pairs, naked and hidden pairs, naked triples, and X-Wings — when a puzzle requires backtracking past those, the walkthrough flags it explicitly so you know which moves were earned by logic and which by trial and error.