Sudoku solver

Stuck on a puzzle from a paper, a book or another app? Enter it here to solve it: check the answer for a single cell, or see the whole solution.

How it works

• Tap a cell and type the digits, or paste the puzzle as text: 81 digits, row by row, with 0 or a dot for each blank.
• Reveal cell fills only the cell you've selected. Full solution fills the whole grid and lists every step.
• If a digit repeats, or the grid can't be filled, you'll see it before you ask for anything.
• It solves the classic 9×9 puzzle only, not variants such as Killer, Jigsaw or Sudoku X.

Share a puzzle

The page address holds the grid just as you see it, revealed cells included, so a reload keeps it and Share sends it. Share before revealing anything to send just the puzzle, or after, to show the answer.

Learn the moves

Each step of the solution names its technique and links to it in the Sudoku strategy guide, worked through on a real puzzle. Then try them yourself: play today's Sudoku.