8
4
2
5
1
7
6
3
9
1
6
3
8
4
9
7
5
2
9
7
5
2
6
3
8
4
1
2
5
4
7
9
6
1
8
3
6
7
8
3
2
1
5
9
4
1
3
9
5
8
4
6
2
7
3
6
8
9
7
1
4
2
5
4
1
5
2
3
6
9
8
7
7
9
2
4
5
8
3
1
6
This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Locked Triple, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined, Naked Triple, Empty Rectangle, Uniqueness Test 1, Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 5 / Column 1 → 7 (Hidden Single)
- Row 4 / Column 8 → 3 (Hidden Single)
- Row 5 / Column 4 → 3 (Hidden Single)
- Locked Triple: 1,5,6 in r456c7 => r13c7,r5c9<>1, r139c7,r5c9,r6c8<>5, r1379c7,r5c9,r6c8<>6
- Row 9 / Column 7 → 3 (Naked Single)
- Row 7 / Column 7 → 7 (Naked Single)
- Row 7 / Column 1 → 3 (Hidden Single)
- Row 1 / Column 8 → 7 (Hidden Single)
- Row 8 / Column 2 → 7 (Hidden Single)
- Row 9 / Column 1 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 5 in b7 => r5c3<>5
- Locked Candidates Type 2 (Claiming): 9 in r2 => r1c4<>9
- X-Wing: 2 r68 c48 => r47c4<>2
- Row 4 / Column 1 → 2 (Hidden Single)
- Row 5 / Column 3 → 6 (Naked Single)
- Row 1 / Column 3 → 2 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 8 in b4 => r27c2<>8
- Locked Candidates Type 1 (Pointing): 8 in b7 => r3c3<>8
- Locked Candidates Type 2 (Claiming): 8 in r2 => r1c45,r3c5<>8
- Naked Triple: 1,5,6 in r1c459 => r1c1<>6
- Empty Rectangle: 6 in b9 (r38c1) => r3c9<>6
- Uniqueness Test 1: 8/9 in r1c17,r3c17 => r3c1<>8, r3c1<>9
- Row 3 / Column 1 → 6 (Naked Single)
- Row 2 / Column 2 → 1 (Naked Single)
- Row 8 / Column 1 → 9 (Naked Single)
- Row 1 / Column 1 → 8 (Full House)
- Row 3 / Column 3 → 9 (Full House)
- Row 7 / Column 2 → 6 (Naked Single)
- Row 1 / Column 7 → 9 (Naked Single)
- Row 3 / Column 7 → 8 (Naked Single)
- Row 7 / Column 9 → 2 (Naked Single)
- Row 5 / Column 9 → 4 (Naked Single)
- Row 5 / Column 6 → 1 (Naked Single)
- Row 6 / Column 8 → 2 (Naked Single)
- Row 5 / Column 7 → 5 (Naked Single)
- Row 5 / Column 5 → 2 (Full House)
- Row 8 / Column 6 → 6 (Naked Single)
- Row 6 / Column 7 → 6 (Naked Single)
- Row 4 / Column 7 → 1 (Full House)
- Row 4 / Column 6 → 8 (Naked Single)
- Row 8 / Column 8 → 5 (Naked Single)
- Row 9 / Column 9 → 6 (Full House)
- Row 9 / Column 5 → 8 (Naked Single)
- Row 4 / Column 2 → 5 (Naked Single)
- Row 4 / Column 4 → 6 (Full House)
- Row 6 / Column 2 → 8 (Full House)
- Row 6 / Column 6 → 4 (Naked Single)
- Row 2 / Column 6 → 9 (Full House)
- Row 6 / Column 4 → 5 (Full House)
- Row 3 / Column 8 → 4 (Naked Single)
- Row 2 / Column 8 → 6 (Full House)
- Row 8 / Column 3 → 1 (Naked Single)
- Row 8 / Column 4 → 2 (Full House)
- Row 9 / Column 3 → 5 (Naked Single)
- Row 9 / Column 4 → 9 (Full House)
- Row 7 / Column 3 → 8 (Full House)
- Row 1 / Column 4 → 1 (Naked Single)
- Row 2 / Column 5 → 4 (Naked Single)
- Row 2 / Column 4 → 8 (Full House)
- Row 7 / Column 4 → 4 (Full House)
- Row 7 / Column 5 → 1 (Full House)
- Row 1 / Column 9 → 5 (Naked Single)
- Row 1 / Column 5 → 6 (Full House)
- Row 3 / Column 5 → 5 (Full House)
- Row 3 / Column 9 → 1 (Full House)
Show More...