3
1
5
7
6
2
8
9
4
7
8
4
1
9
5
3
6
2
6
9
2
3
4
8
5
1
7
6
4
8
2
5
9
1
7
3
5
1
9
4
3
7
6
2
8
7
2
3
8
1
6
4
5
9
5
2
7
4
8
1
9
3
6
9
4
3
2
7
6
8
5
1
6
8
1
9
3
5
2
7
4
This Sudoku Puzzle has 23 steps and it is solved using Full House, Naked Single techniques.
Naked Single
Explanation
Full House
Explanation
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