3
7
9
6
5
2
1
4
8
4
5
2
8
1
9
3
6
7
6
8
6
4
7
3
2
5
9
2
3
7
9
8
7
5
6
4
9
4
8
5
4
1
2
3
1
1
4
5
6
3
2
8
9
7
5
1
3
8
9
6
4
2
1
6
8
4
1
2
3
7
9
5
9
2
1
7
5
4
3
6
8
This Sudoku Puzzle has 20 steps and it is solved using Full House, Naked Single techniques.
Naked Single
Explanation
Full House
Explanation
Show More...