A number puzzle on a 9×9 grid. Place the digits 1 to 9 so that none repeats in any row, column, or box.
The goal is to fill the whole grid with non-repeating digits under three rules. Just 4 steps to a solved puzzle.
The 9×9 grid is split into nine 3×3 boxes. Some cells are already filled — those are your starting clues.
In every row and every column, the digits 1 through 9 each appear exactly once.
Inside each 3×3 box, all nine digits also appear with no repeats — that's the third rule.
Not sure? Pencil in candidate notes in a cell and cross out the wrong ones as you go.
Sudoku is a puzzle of pure logic with no math at all: there's nothing to add up, only the search for the one correct digit. A good puzzle always has a single solution, and you reach it by elimination. On muta.pro you can pick a level from easy to expert, jot notes, check for mistakes, and take a hint — right in the browser, with no install.