7
2
3
4
6
8
9
5
1
1
8
5
7
2
9
3
6
4
9
4
6
5
3
1
7
8
2
5
7
2
1
8
6
1
3
9
4
3
8
5
9
7
6
4
2
1
6
9
3
2
4
8
7
5
8
5
4
3
9
7
6
1
5
9
7
6
2
5
1
8
5
3
2
1
3
6
9
8
4
9
7
This Sudoku Puzzle has 25 steps and it is solved using Full House, Naked Single techniques.
Naked Single
Explanation
Full House
Explanation
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