1
3
4
5
7
9
2
2
7
3
9
4
1
6
9
7
2
1
3
4
1
2
5
7
9
6
7
5
4
3
9
8
2
1
2
9
8
7
9
8
5
4
6
7
2
1
3
7
6
3
9
1
2
5
4
8
2
8
9
7
6
This Sudoku Puzzle has 31 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Uniqueness Test 4, Discontinuous Nice Loop, Give Up techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
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