8
1
6
5
4
7
9
8
3
5
4
8
2
3
9
1
7
6
9
3
7
8
6
1
5
2
4
2
2
5
8
3
4
6
7
1
8
1
7
9
6
2
3
5
4
6
4
3
1
7
5
2
8
9
1
5
8
4
6
2
3
9
7
4
2
3
7
9
1
6
8
5
7
9
6
3
5
8
4
1
2
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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