Sudoku Solver

Solve any Sudoku puzzle

Puzzle (your clues)

Type the given digits 1–9 and leave unknown cells blank. Edits are saved to the URL so you can share the puzzle.

Every row, column and 3×3 box must contain the digits 1–9 exactly once.
Clues (given cells)
30
Solution
Unique solution
Solved by
Logic alone (no guessing)
Solution string
534678912672195348198342567859761423426853791713924856961537284287419635345286179
Sudoku SolverA completed 9×9 Sudoku grid. The 30 given clues are shown in bold; the remaining cells are filled so every row, column and 3×3 box contains the digits 1–9 exactly once, colour-coded by whether each was deduced by logic or found by search.534678912672195348198342567859761423426853791713924856961537284287419635345286179
  • Given
  • Deduced by logic
  • Filled by search

Über diesen Rechner

The Sudoku Solver fills any 9×9 Sudoku puzzle so every row, column and 3×3 box contains the digits 1–9 exactly once. Enter your clues on the interactive grid and it finds the solution instantly using backtracking search with the minimum-remaining-values heuristic. It checks that the clues are legal, tells you whether the puzzle has a single unique solution, and colour-codes each answer by whether it was deduced by pure logic or required a search.