Su Doku
Hard 9 - Answer
4
3
6
7
9
5
2
1
8
1
9
7
2
6
8
5
3
4
2
5
8
1
3
4
6
9
7
6
1
3
4
2
7
8
5
9
9
2
4
5
8
3
1
7
6
7
8
5
9
1
6
4
2
3
5
4
2
6
7
9
3
8
1
3
7
1
8
4
2
9
6
5
8
6
9
3
5
1
7
4
2
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