5
1
2
3
7
4
2
9
4
6
7
5
1
3
8
3
4
1
2
5
4
1
8
2
3
5
9
7
6
5
2
3
9
6
7
4
8
1
6
7
9
1
4
3
2
4
1
5
3
8
1
3
4
6
7
5
3
5
8
2
4
1
This Sudoku Puzzle has 19 steps and it is solved using Full House, Naked Single techniques.
Naked Single
Explanation
Full House
Explanation
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