9
4
8
7
2
3
1
7
4
5
9
5
3
9
1
6
5
4
2
9
5
4
9
9
6
8
7
This Sudoku Puzzle has 57 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming) techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 3 / Column 4 → 4 (Hidden Single)
- Row 6 / Column 6 → 4 (Hidden Single)
- Row 3 / Column 5 → 9 (Hidden Single)
- Row 8 / Column 4 → 3 (Hidden Single)
- Row 8 / Column 8 → 5 (Hidden Single)
- Row 8 / Column 3 → 1 (Naked Single)
- Row 8 / Column 1 → 7 (Naked Single)
- Row 8 / Column 6 → 2 (Full House)
- Row 9 / Column 5 → 8 (Naked Single)
- Row 7 / Column 5 → 7 (Naked Single)
- Row 3 / Column 8 → 8 (Hidden Single)
- Row 3 / Column 1 → 1 (Hidden Single)
- Row 1 / Column 4 → 8 (Hidden Single)
- Row 7 / Column 2 → 8 (Hidden Single)
- Row 5 / Column 6 → 8 (Hidden Single)
- Row 2 / Column 4 → 6 (Hidden Single)
- Row 2 / Column 6 → 5 (Naked Single)
- Row 1 / Column 5 → 2 (Full House)
- Row 5 / Column 5 → 5 (Full House)
- Row 2 / Column 2 → 3 (Naked Single)
- Row 3 / Column 3 → 6 (Naked Single)
- Row 1 / Column 3 → 5 (Full House)
- Row 3 / Column 9 → 3 (Full House)
- Row 6 / Column 2 → 7 (Naked Single)
- Row 9 / Column 2 → 5 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 6 in b7 => r45c1<>6
- Locked Candidates Type 1 (Pointing): 3 in b9 => r6c7<>3
- Locked Candidates Type 2 (Claiming): 2 in r6 => r4c78,r5c89<>2
- Row 6 / Column 8 → 2 (Hidden Single)
- Row 6 / Column 9 → 9 (Naked Single)
- Row 2 / Column 9 → 2 (Naked Single)
- Row 2 / Column 7 → 9 (Full House)
- Row 6 / Column 7 → 8 (Naked Single)
- Row 6 / Column 3 → 3 (Full House)
- Row 5 / Column 1 → 2 (Naked Single)
- Row 9 / Column 3 → 4 (Naked Single)
- Row 4 / Column 3 → 8 (Full House)
- Row 4 / Column 1 → 4 (Naked Single)
- Row 5 / Column 4 → 7 (Naked Single)
- Row 4 / Column 4 → 2 (Full House)
- Row 9 / Column 9 → 1 (Naked Single)
- Row 5 / Column 9 → 6 (Naked Single)
- Row 7 / Column 7 → 3 (Naked Single)
- Row 7 / Column 9 → 4 (Naked Single)
- Row 1 / Column 9 → 7 (Full House)
- Row 9 / Column 7 → 2 (Full House)
- Row 9 / Column 6 → 6 (Naked Single)
- Row 7 / Column 6 → 1 (Full House)
- Row 7 / Column 1 → 6 (Full House)
- Row 9 / Column 1 → 3 (Full House)
- Row 4 / Column 8 → 1 (Naked Single)
- Row 5 / Column 2 → 1 (Naked Single)
- Row 4 / Column 2 → 6 (Full House)
- Row 4 / Column 7 → 7 (Full House)
- Row 1 / Column 7 → 1 (Full House)
- Row 1 / Column 8 → 6 (Full House)
- Row 5 / Column 8 → 3 (Full House)
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