4
1
6
1
7
8
3
2
6
5
1
2
8
4
3
2
1
6
1
5
2
6
4
8
1
3
2
6
8
6
4
This Sudoku Puzzle has 58 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, Naked Triple, Remote Pair, Naked Single, Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 6 / Column 5 → 6 (Hidden Single)
- Row 2 / Column 2 → 2 (Hidden Single)
- Row 3 / Column 5 → 2 (Hidden Single)
- Row 3 / Column 4 → 5 (Hidden Single)
- Row 6 / Column 2 → 5 (Hidden Single)
- Row 4 / Column 2 → 3 (Hidden Single)
- Row 6 / Column 8 → 3 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 4 in b2 => r2c7<>4
- Locked Candidates Type 1 (Pointing): 9 in b2 => r2c17<>9
- Locked Candidates Type 1 (Pointing): 4 in b6 => r5c5<>4
- Naked Pair: 7,9 in r5c5,r6c4 => r4c45<>7, r4c456<>9
- Naked Pair: 7,9 in r4c8,r6c7 => r5c79<>7, r5c79<>9
- Naked Triple: 3,7,9 in r79c9,r8c8 => r79c7<>3, r789c7<>7, r789c7<>9
- Locked Candidates Type 1 (Pointing): 3 in b9 => r1c9<>3
- Remote Pair: 7/9 r6c4 -9- r6c7 -7- r4c8 -9- r8c8 => r8c4<>7, r8c4<>9
- Row 8 / Column 4 → 8 (Naked Single)
- Row 4 / Column 4 → 4 (Naked Single)
- Row 2 / Column 4 → 9 (Naked Single)
- Row 2 / Column 6 → 4 (Full House)
- Row 6 / Column 4 → 7 (Full House)
- Row 6 / Column 7 → 9 (Full House)
- Row 4 / Column 5 → 5 (Naked Single)
- Row 5 / Column 5 → 9 (Naked Single)
- Row 4 / Column 6 → 8 (Full House)
- Row 4 / Column 8 → 7 (Naked Single)
- Row 4 / Column 3 → 9 (Full House)
- Row 8 / Column 8 → 9 (Full House)
- Row 9 / Column 5 → 7 (Naked Single)
- Row 7 / Column 5 → 4 (Full House)
- Row 8 / Column 6 → 5 (Naked Single)
- Row 7 / Column 6 → 9 (Full House)
- Row 9 / Column 9 → 3 (Naked Single)
- Row 7 / Column 9 → 7 (Naked Single)
- Row 9 / Column 3 → 5 (Naked Single)
- Row 7 / Column 1 → 3 (Naked Single)
- Row 9 / Column 7 → 1 (Naked Single)
- Row 9 / Column 1 → 9 (Full House)
- Row 2 / Column 1 → 7 (Naked Single)
- Row 2 / Column 7 → 3 (Full House)
- Row 7 / Column 3 → 2 (Naked Single)
- Row 7 / Column 7 → 5 (Full House)
- Row 8 / Column 7 → 2 (Full House)
- Row 1 / Column 1 → 5 (Naked Single)
- Row 3 / Column 1 → 6 (Naked Single)
- Row 5 / Column 1 → 1 (Full House)
- Row 3 / Column 2 → 9 (Naked Single)
- Row 1 / Column 7 → 8 (Naked Single)
- Row 8 / Column 3 → 7 (Naked Single)
- Row 8 / Column 2 → 1 (Full House)
- Row 5 / Column 2 → 7 (Full House)
- Row 5 / Column 3 → 6 (Full House)
- Row 3 / Column 3 → 8 (Naked Single)
- Row 1 / Column 3 → 3 (Full House)
- Row 1 / Column 9 → 9 (Full House)
- Row 3 / Column 9 → 4 (Naked Single)
- Row 3 / Column 7 → 7 (Full House)
- Row 5 / Column 7 → 4 (Full House)
- Row 5 / Column 9 → 8 (Full House)
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