2
4
8
3
5
9
1
7
6
1
5
9
2
6
7
3
4
8
6
7
3
8
4
1
9
2
5
6
9
4
5
8
1
7
2
3
7
8
5
6
3
2
9
1
4
1
3
2
7
9
4
5
8
6
9
3
5
8
6
7
4
1
2
4
7
1
5
2
3
8
9
6
2
6
8
4
1
9
3
5
7
This Sudoku Puzzle has 15 steps and it is solved using Full House, Naked Single techniques.
Naked Single
Explanation
Full House
Explanation
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