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