Sudoku
Fill the grid so that every row, column, and 3x3 box contains the digits 1 to 9.
How to Play
Click on a cell to select it, then use the number pad (or keyboard 1-9) to fill it.
- Initial numbers cannot be changed.
- Selected cell is highlighted in blue.
- Same numbers are highlighted to help you spot patterns.
- Conflicts (duplicates in row/col/box) are highlighted in red.