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