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