3
6
7
1
2
2
7
1
4
8
3
9
4
2
6
8
1
2
4
6
2
8
9
7
3
9
6
8
3
5
6
3
7
9
3
5
How to play: Fill the 9×9 grid so that every row, column, and 3×3 box contains the digits 1-9.
Gray cells are given numbers that cannot be changed. Click dropdown arrows to select numbers, or use keyboard (1-9 keys, Space/Backspace to clear).