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