2
6
3
4
9
8
1
3
8
6
1
2
9
5
1
9
4
8
6
2
3
7
4
8
5
9
3
1
2
6
6
9
1
8
3
5
5
3
2
8
6
1
4
7
9
8
4
6
3
1
1
3
8
6
7
6
3
1
2
8
This Sudoku Puzzle has 21 steps and it is solved using Full House, Naked Single techniques.
Naked Single
Explanation
Full House
Explanation
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