3
9
6
5
2
4
1
7
8
7
4
8
1
6
3
5
9
2
1
5
2
9
8
7
4
6
3
8
3
2
7
4
5
9
6
1
6
7
4
9
8
1
3
2
5
5
1
9
3
2
6
8
7
4
2
5
7
4
1
9
6
8
3
8
3
9
2
5
6
4
1
7
6
4
1
7
3
8
2
9
5
This Sudoku Puzzle has 27 steps and it is solved using Naked Single, Full House techniques.
Naked Single
Explanation
Full House
Explanation
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