Tool · AI Sudoku Solver
AI Sudoku Solver
SudokuDX's AI Sudoku solver solves any 9×9 puzzle instantly — or walks it one logical step at a time so you can learn the technique. Type the givens, paste an 81-character string, or scan a screenshot or photo of a puzzle. You can also drag an image onto this page.
0 givens · drag, paste or upload a screenshot to load a puzzle
How to use the AI Sudoku solver
- Scan image or Take photo reads a screenshot or newspaper puzzle straight into the grid — always double-check the digits.
- Type digits 1–9 into the grid. Arrow keys navigate; Backspace clears. Paste an 81-character string into any cell.
- Next step shows one deduction at a time; Solve with logic applies every technique it can; Solve finishes the grid outright.
- Candidates are shown in every empty cell so you can follow the eliminations.
Frequently asked questions
How does the AI Sudoku solver work?
Enter the given digits of any 9×9 Sudoku puzzle — or upload a screenshot or photo — and SudokuDX's AI Sudoku solver will solve it step by step, showing the technique used at each step: naked and hidden singles, pairs and triples, pointing pairs, box-line reductions and X-Wings.
Can I solve a Sudoku from a photo or screenshot?
Yes. Tap Scan image, upload a screenshot or snap a photo of a newspaper puzzle, and the AI Sudoku solver reads the grid automatically. You can fix any misread cell before solving.
Can the AI Sudoku solver handle any puzzle?
Yes — any well-formed 9×9 puzzle. The AI Sudoku solver uses the same logic engine that grades our own puzzles, and warns you if a puzzle has no solution or more than one.
Is the AI Sudoku solver free?
Yes. The AI Sudoku solver is free and unlimited, including candidate display, step-by-step technique explanations and image scanning.