Solution for Hard Sudoku #128713524895
5
2
8
8
3
8
7
7
2
9
1
2
1
8
5
7
3
4
9
7
4
1
1
9
3
8
3
8
7
This Sudoku Puzzle has 55 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 5 → 2 (Hidden Single)
- Row 9 / Column 5 → 6 (Naked Single)
- Row 1 / Column 5 → 4 (Naked Single)
- Row 7 / Column 5 → 7 (Full House)
- Row 9 / Column 9 → 9 (Hidden Single)
- Row 9 / Column 3 → 2 (Naked Single)
- Row 9 / Column 8 → 5 (Naked Single)
- Row 9 / Column 4 → 8 (Full House)
- Row 8 / Column 4 → 4 (Hidden Single)
- Row 7 / Column 8 → 4 (Hidden Single)
- Row 7 / Column 6 → 2 (Hidden Single)
- Row 8 / Column 6 → 5 (Full House)
- Row 8 / Column 7 → 2 (Hidden Single)
- Row 8 / Column 9 → 1 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 6 in b5 => r5c123789<>6
- Locked Candidates Type 1 (Pointing): 9 in b5 => r5c123<>9
- Row 7 / Column 3 → 9 (Hidden Single)
- Locked Candidates Type 2 (Claiming): 1 in r3 => r12c7<>1
- Row 1 / Column 7 → 6 (Naked Single)
- Row 1 / Column 2 → 9 (Naked Single)
- Row 1 / Column 1 → 1 (Full House)
- Row 1 / Column 6 → 1 (Full House)
- Row 6 / Column 7 → 5 (Naked Single)
- Row 2 / Column 6 → 6 (Naked Single)
- Row 2 / Column 4 → 5 (Naked Single)
- Row 5 / Column 6 → 9 (Naked Single)
- Row 5 / Column 4 → 6 (Full House)
- Row 3 / Column 4 → 9 (Full House)
- Row 2 / Column 9 → 4 (Naked Single)
- Row 2 / Column 7 → 3 (Naked Single)
- Row 2 / Column 1 → 7 (Full House)
- Row 2 / Column 3 → 7 (Full House)
- Row 3 / Column 9 → 5 (Naked Single)
- Row 3 / Column 7 → 1 (Full House)
- Row 3 / Column 8 → 1 (Full House)
- Row 5 / Column 7 → 4 (Full House)
- Row 5 / Column 3 → 3 (Naked Single)
- Row 5 / Column 1 → 2 (Naked Single)
- Row 5 / Column 2 → 8 (Naked Single)
- Row 5 / Column 8 → 2 (Naked Single)
- Row 8 / Column 3 → 6 (Naked Single)
- Row 7 / Column 1 → 5 (Full House)
- Row 7 / Column 2 → 5 (Full House)
- Row 8 / Column 1 → 3 (Full House)
- Row 5 / Column 9 → 7 (Naked Single)
- Row 6 / Column 2 → 6 (Naked Single)
- Row 6 / Column 8 → 6 (Naked Single)
- Row 4 / Column 3 → 4 (Naked Single)
- Row 4 / Column 1 → 6 (Naked Single)
- Row 4 / Column 9 → 6 (Naked Single)
- Row 4 / Column 2 → 4 (Naked Single)
- Row 6 / Column 1 → 9 (Naked Single)
- Row 6 / Column 9 → 8 (Naked Single)
- Row 4 / Column 8 → 3 (Naked Single)
- Row 3 / Column 2 → 3 (Naked Single)
Show More...