3
9
6
5
2
4
1
7
8
7
1
6
9
2
1
2
9
7
6
2
7
5
6
1
6
7
9
8
1
2
5
1
2
6
8
7
2
5
7
4
1
9
6
3
3
2
6
1
7
6
4
1
7
3
8
2
9
5
This Sudoku Puzzle has 23 steps and it is solved using Full House, Naked Single techniques.
Naked Single
Explanation
Full House
Explanation
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