2
8
1
9
7
3
4
5
6
9
3
6
1
4
5
8
2
7
5
4
7
2
8
6
9
3
1
7
2
4
8
6
9
1
3
5
3
6
1
7
5
2
4
8
9
8
9
5
4
1
3
7
6
2
6
1
7
3
4
2
5
9
8
2
9
4
5
1
8
6
7
3
3
5
8
6
7
9
1
2
4
This Sudoku Puzzle has 58 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), undefined techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 1 / Column 7 → 5 (Hidden Single)
- Row 8 / Column 6 → 8 (Hidden Single)
- Row 2 / Column 8 → 8 (Hidden Single)
- Row 7 / Column 5 → 9 (Hidden Single)
- Row 8 / Column 8 → 7 (Hidden Single)
- Row 7 / Column 3 → 7 (Hidden Single)
- Row 2 / Column 2 → 7 (Hidden Single)
- Row 1 / Column 9 → 7 (Hidden Single)
- Row 8 / Column 2 → 4 (Hidden Single)
- Row 3 / Column 1 → 4 (Hidden Single)
- Row 1 / Column 5 → 3 (Hidden Single)
- Row 8 / Column 3 → 2 (Hidden Single)
- Row 3 / Column 5 → 2 (Hidden Single)
- Row 4 / Column 5 → 6 (Naked Single)
- Row 1 / Column 1 → 2 (Hidden Single)
- Row 8 / Column 4 → 5 (Hidden Single)
- Row 9 / Column 5 → 7 (Naked Single)
- Row 9 / Column 4 → 6 (Full House)
- Row 6 / Column 1 → 1 (Hidden Single)
- Row 5 / Column 4 → 7 (Hidden Single)
- Row 7 / Column 1 → 6 (Hidden Single)
- Row 7 / Column 7 → 3 (Naked Single)
- Row 7 / Column 9 → 8 (Full House)
- Locked Candidates Type 1 (Pointing): 6 in b1 => r56c3<>6
- W-Wing: 1/4 in r2c4,r9c9 connected by 4 in r6c49 => r2c9<>1
- Row 2 / Column 9 → 6 (Naked Single)
- Row 8 / Column 9 → 9 (Naked Single)
- Row 8 / Column 7 → 6 (Full House)
- Row 1 / Column 6 → 6 (Hidden Single)
- Row 1 / Column 3 → 1 (Full House)
- Row 3 / Column 3 → 6 (Full House)
- Row 6 / Column 8 → 6 (Hidden Single)
- Row 5 / Column 2 → 6 (Hidden Single)
- Row 5 / Column 9 → 3 (Hidden Single)
- Row 3 / Column 9 → 1 (Naked Single)
- Row 4 / Column 8 → 9 (Naked Single)
- Row 3 / Column 8 → 3 (Full House)
- Row 3 / Column 7 → 9 (Full House)
- Row 9 / Column 9 → 4 (Naked Single)
- Row 6 / Column 9 → 2 (Full House)
- Row 5 / Column 7 → 4 (Full House)
- Row 9 / Column 7 → 1 (Full House)
- Row 6 / Column 2 → 3 (Naked Single)
- Row 4 / Column 2 → 2 (Full House)
- Row 5 / Column 5 → 5 (Naked Single)
- Row 2 / Column 5 → 4 (Full House)
- Row 6 / Column 4 → 4 (Naked Single)
- Row 4 / Column 6 → 1 (Naked Single)
- Row 4 / Column 4 → 3 (Full House)
- Row 2 / Column 4 → 1 (Full House)
- Row 2 / Column 6 → 5 (Full House)
- Row 5 / Column 1 → 8 (Naked Single)
- Row 9 / Column 1 → 5 (Full House)
- Row 9 / Column 3 → 8 (Full House)
- Row 6 / Column 6 → 9 (Naked Single)
- Row 5 / Column 6 → 2 (Full House)
- Row 5 / Column 3 → 9 (Full House)
- Row 6 / Column 3 → 5 (Full House)
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