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