1
7
6
2
8
3
2
5
9
1
7
9
3
4
8
7
1
6
2
5
3
8
6
7
9
5
2
8
4
7
6
5
8
4
1
4
1
7
3
8
2
5
2
1
9
4
6
9
4
5
7
How to Play
- Fill the grid so that every row, column, and 3x3 box contains the digits 1 to 9.
- Select a difficulty level to start a new game.
- Use the number pad or keyboard to fill in cells.
- Relax and enjoy the process.