Skip to content
Sudoku Hike

Sudoku solver, step by step

Stuck on a sudoku from a newspaper, a book or another app? Enter it, and the solver shows you the next step, explained, so you can carry on yourself and learn how.

Enter the puzzle

81 digits, row by row, with 0 or . for an empty cell.

How it works

  1. Enter the puzzle: tap a cell, then a digit, or paste all 81 digits.
  2. Choose Check. The solver makes sure the puzzle has exactly one solution and tells you how hard it is.
  3. Choose Next step whenever you’re stuck. You see the easiest step, the cells it’s about and why it works, with a link to the technique’s guide.
  4. Apply the step, or carry on with your own digits. Undo takes steps back, and you can show the whole solution at the end.

It’s free for everyone, no account needed. Our own Daily and the games you’re playing are left to you: they’re not solved here.