7
2
1
9
7
5
1
6
3
4
9
4
7
3
3
6
6
9
1
2
4
6
2
9
3
This Sudoku Puzzle has 60 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Skyscraper techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 9 / Column 7 → 6 (Hidden Single)
- Row 7 / Column 4 → 3 (Hidden Single)
- Row 2 / Column 5 → 3 (Hidden Single)
- Row 8 / Column 3 → 3 (Hidden Single)
- Row 2 / Column 4 → 1 (Hidden Single)
- Row 2 / Column 3 → 6 (Hidden Single)
- Row 1 / Column 6 → 6 (Hidden Single)
- Row 5 / Column 2 → 6 (Hidden Single)
- Row 4 / Column 5 → 6 (Hidden Single)
- Row 3 / Column 6 → 4 (Hidden Single)
- Row 3 / Column 2 → 8 (Naked Single)
- Row 3 / Column 4 → 2 (Naked Single)
- Row 1 / Column 4 → 8 (Full House)
- Row 1 / Column 8 → 2 (Hidden Single)
- Row 1 / Column 1 → 3 (Hidden Single)
- Row 3 / Column 1 → 9 (Naked Single)
- Row 3 / Column 7 → 7 (Naked Single)
- Row 3 / Column 8 → 3 (Full House)
- Locked Candidates Type 1 (Pointing): 7 in b4 => r8c1<>7
- Locked Candidates Type 1 (Pointing): 1 in b9 => r45c8<>1
- Locked Candidates Type 2 (Claiming): 2 in r5 => r4c6,r6c5<>2
- Skyscraper: 4 in r1c9,r9c8 (connected by r19c2) => r2c8,r8c9<>4
- Row 9 / Column 8 → 4 (Hidden Single)
- Row 8 / Column 1 → 4 (Hidden Single)
- Row 2 / Column 1 → 5 (Naked Single)
- Row 1 / Column 2 → 4 (Full House)
- Row 1 / Column 9 → 5 (Full House)
- Row 2 / Column 8 → 8 (Naked Single)
- Row 7 / Column 8 → 1 (Hidden Single)
- Row 9 / Column 3 → 8 (Hidden Single)
- Row 7 / Column 2 → 7 (Hidden Single)
- Row 9 / Column 2 → 5 (Full House)
- Row 9 / Column 4 → 9 (Naked Single)
- Row 5 / Column 4 → 5 (Full House)
- Row 9 / Column 6 → 1 (Naked Single)
- Row 9 / Column 5 → 7 (Full House)
- Row 5 / Column 8 → 7 (Naked Single)
- Row 4 / Column 8 → 5 (Full House)
- Row 4 / Column 3 → 2 (Naked Single)
- Row 6 / Column 3 → 5 (Full House)
- Row 8 / Column 9 → 7 (Hidden Single)
- Row 4 / Column 1 → 7 (Hidden Single)
- Row 6 / Column 7 → 2 (Hidden Single)
- Row 4 / Column 9 → 1 (Hidden Single)
- Row 6 / Column 9 → 4 (Hidden Single)
- Row 2 / Column 9 → 9 (Naked Single)
- Row 2 / Column 7 → 4 (Full House)
- Row 5 / Column 9 → 8 (Full House)
- Row 4 / Column 7 → 9 (Full House)
- Row 4 / Column 6 → 8 (Full House)
- Row 5 / Column 1 → 1 (Naked Single)
- Row 6 / Column 1 → 8 (Full House)
- Row 6 / Column 5 → 1 (Full House)
- Row 7 / Column 6 → 5 (Naked Single)
- Row 7 / Column 7 → 8 (Full House)
- Row 8 / Column 7 → 5 (Full House)
- Row 5 / Column 5 → 2 (Naked Single)
- Row 5 / Column 6 → 9 (Full House)
- Row 8 / Column 6 → 2 (Full House)
- Row 8 / Column 5 → 8 (Full House)
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