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