00
:
00
4
1
8
3
1
2
9
3
6
5
6
4
7
2
1
5
9
3
4
1
3
6
1
5
7
9
8
8
6
1
5
7
6
9
8
2
6
1
4
9
8
5
7
2
Number
Corner Notes
Center Notes
Erase
Undo
Auto Notes
Check Solution
Lock Mode
1
9
2
9
3
9
4
9
5
9
6
9
7
9
8
9
9
9
Easy
Medium
Hard
Expert