5
9
6
8
1
5
9
8
7
9
2
6
8
5
7
2
4
6
3
2
7
1
6
8
This Sudoku Puzzle has 61 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, Naked Triple, Skyscraper techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 6 / Column 6 → 4 (Naked Single)
- Row 8 / Column 4 → 9 (Naked Single)
- Row 9 / Column 1 → 3 (Naked Single)
- Row 3 / Column 6 → 2 (Naked Single)
- Row 6 / Column 5 → 3 (Naked Single)
- Row 7 / Column 4 → 4 (Naked Single)
- Row 8 / Column 6 → 6 (Naked Single)
- Row 3 / Column 5 → 4 (Naked Single)
- Row 6 / Column 4 → 1 (Naked Single)
- Row 2 / Column 4 → 3 (Naked Single)
- Row 4 / Column 4 → 2 (Full House)
- Row 9 / Column 5 → 5 (Naked Single)
- Row 7 / Column 5 → 8 (Full House)
- Row 1 / Column 5 → 7 (Naked Single)
- Row 2 / Column 6 → 9 (Full House)
- Row 5 / Column 5 → 9 (Full House)
- Row 4 / Column 6 → 7 (Full House)
- Row 6 / Column 8 → 5 (Naked Single)
- Row 9 / Column 3 → 9 (Naked Single)
- Row 6 / Column 2 → 8 (Naked Single)
- Row 6 / Column 7 → 6 (Full House)
- Row 4 / Column 1 → 1 (Naked Single)
- Row 1 / Column 1 → 2 (Naked Single)
- Row 7 / Column 1 → 7 (Naked Single)
- Row 5 / Column 1 → 6 (Naked Single)
- Row 3 / Column 1 → 8 (Full House)
- Row 4 / Column 7 → 8 (Hidden Single)
- Row 8 / Column 3 → 8 (Hidden Single)
- Row 2 / Column 3 → 6 (Hidden Single)
- Row 3 / Column 9 → 6 (Hidden Single)
- Row 8 / Column 7 → 7 (Hidden Single)
- Row 4 / Column 9 → 9 (Hidden Single)
- Row 7 / Column 7 → 9 (Hidden Single)
- Row 2 / Column 2 → 7 (Hidden Single)
- Row 5 / Column 3 → 7 (Hidden Single)
- Row 1 / Column 7 → 5 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 4 in b1 => r1c9<>4
- Naked Pair: 2,4 in r29c7 => r5c7<>2, r5c7<>4
- Naked Triple: 1,3,5 in r178c9 => r5c9<>1, r5c9<>3
- Skyscraper: 1 in r3c7,r7c9 (connected by r37c3) => r1c9<>1
- Row 1 / Column 9 → 3 (Naked Single)
- Row 3 / Column 7 → 1 (Naked Single)
- Row 3 / Column 3 → 3 (Full House)
- Row 5 / Column 7 → 3 (Naked Single)
- Row 4 / Column 8 → 4 (Naked Single)
- Row 5 / Column 2 → 4 (Naked Single)
- Row 2 / Column 8 → 2 (Naked Single)
- Row 2 / Column 7 → 4 (Full House)
- Row 9 / Column 7 → 2 (Full House)
- Row 9 / Column 9 → 4 (Full House)
- Row 4 / Column 3 → 5 (Naked Single)
- Row 4 / Column 2 → 3 (Full House)
- Row 5 / Column 9 → 2 (Naked Single)
- Row 5 / Column 8 → 1 (Full House)
- Row 8 / Column 8 → 3 (Full House)
- Row 1 / Column 2 → 1 (Naked Single)
- Row 1 / Column 3 → 4 (Full House)
- Row 7 / Column 3 → 1 (Full House)
- Row 8 / Column 2 → 5 (Full House)
- Row 7 / Column 9 → 5 (Full House)
- Row 8 / Column 9 → 1 (Full House)
Show More...