00
:
00
7
2
4
5
6
3
8
2
1
8
7
2
9
3
4
2
1
5
1
6
3
7
1
6
5
4
9
7
2
3
1
9
5
8
4
1
8
7
3
5
5
4
2
7
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