5
6
8
4
1
7
2
3
9
2
7
4
9
3
5
1
6
8
9
3
1
6
2
8
4
7
5
8
2
2
3
4
4
7
9
5
3
9
7
6
8
2
6
1
2
1
1
6
7
5
9
3
8
4
6
8
6
9
5
3
1
7
1
7
2
3
7
4
1
5
4
9
5
9
1
8
6
2
2
4
3
This Sudoku Puzzle has 55 steps and it is solved using Hidden Single, Locked Triple, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Locked Pair, Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 6 / Column 3 → 5 (Hidden Single)
- Row 8 / Column 2 → 5 (Hidden Single)
- Locked Triple: 2,4,6 in r789c5 => r3c5,r78c4,r8c6<>2, r3c5,r78c4,r8c6<>6, r78c4,r8c6<>4
- Row 3 / Column 5 → 6 (Naked Single)
- Row 8 / Column 6 → 1 (Naked Single)
- Row 7 / Column 4 → 7 (Naked Single)
- Row 8 / Column 4 → 7 (Naked Single)
- Row 5 / Column 7 → 7 (Hidden Single)
- Row 5 / Column 8 → 5 (Hidden Single)
- Row 7 / Column 7 → 5 (Hidden Single)
- Row 5 / Column 9 → 9 (Hidden Single)
- Row 7 / Column 8 → 9 (Hidden Single)
- Row 1 / Column 7 → 9 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 4 in b2 => r1c2<>4
- Locked Candidates Type 1 (Pointing): 1 in b6 => r4c23<>1
- Locked Candidates Type 2 (Claiming): 6 in r8 => r7c9,r9c78<>6
- Locked Candidates Type 2 (Claiming): 6 in r7 => r9c13<>6
- Locked Candidates Type 2 (Claiming): 6 in c4 => r56c6<>6
- Locked Pair: 2,4 in r56c6 => r1c6,r56c4<>2, r1c6,r56c4<>4
- Row 1 / Column 6 → 4 (Naked Single)
- Row 5 / Column 4 → 6 (Naked Single)
- Row 6 / Column 4 → 6 (Naked Single)
- Row 5 / Column 6 → 2 (Naked Single)
- Row 6 / Column 6 → 2 (Naked Single)
- Row 6 / Column 9 → 4 (Naked Single)
- Locked Candidates Type 1 (Pointing): 2 in b4 => r4c789<>2
- Locked Pair: 1,6 in r4c78 => r4c239<>6, r4c9<>1
- Row 4 / Column 9 → 6 (Naked Single)
- Row 4 / Column 7 → 1 (Naked Single)
- Row 4 / Column 8 → 1 (Naked Single)
- Row 8 / Column 9 → 2 (Naked Single)
- Row 9 / Column 7 → 2 (Naked Single)
- Row 1 / Column 9 → 1 (Naked Single)
- Row 7 / Column 9 → 1 (Naked Single)
- Row 8 / Column 5 → 4 (Naked Single)
- Row 9 / Column 8 → 4 (Naked Single)
- Row 2 / Column 7 → 6 (Naked Single)
- Row 2 / Column 8 → 2 (Full House)
- Row 9 / Column 5 → 4 (Naked Single)
- Row 1 / Column 4 → 2 (Naked Single)
- Row 7 / Column 5 → 2 (Naked Single)
- Row 8 / Column 8 → 6 (Naked Single)
- Row 9 / Column 1 → 1 (Naked Single)
- Row 9 / Column 3 → 1 (Naked Single)
- Row 1 / Column 2 → 6 (Naked Single)
- Row 3 / Column 4 → 1 (Naked Single)
- Row 2 / Column 1 → 4 (Naked Single)
- Row 2 / Column 2 → 1 (Full House)
- Row 3 / Column 1 → 2 (Full House)
- Row 5 / Column 3 → 4 (Full House)
- Row 7 / Column 1 → 6 (Full House)
- Row 5 / Column 2 → 4 (Full House)
- Row 4 / Column 2 → 2 (Naked Single)
- Row 4 / Column 3 → 2 (Naked Single)
- Row 7 / Column 3 → 6 (Naked Single)
Show More...