Sudoku Online
About this game
Classic 9×9 sudoku at four difficulties, from Easy to Expert, plus variants that change the rules: X-Sudoku adds the diagonals, Windoku adds extra regions, Killer Sudoku sets target sums for groups of cells, and Kropki uses markers between neighbouring cells. Plenty to keep a sudoku fan busy.
Controls
Select a cell, then enter a digit so that 1–9 appear once in every row, column and 3×3 box.
