5
7
3
8
9
6
4
2
1
1
4
6
7
2
3
8
5
9
2
8
9
4
1
5
7
6
3
9
8
4
6
5
7
1
3
2
3
6
5
2
8
1
4
9
7
1
2
7
3
9
4
8
5
6
3
4
9
7
1
5
2
6
8
6
1
8
9
3
2
5
7
4
5
7
2
6
4
8
9
3
1
This Sudoku Puzzle has 63 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), Naked Triple, Skyscraper, Locked Candidates Type 2 (Claiming), undefined techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 4 / Column 7 → 1 (Naked Single)
- Row 1 / Column 9 → 9 (Hidden Single)
- Row 2 / Column 2 → 9 (Hidden Single)
- Row 6 / Column 5 → 9 (Hidden Single)
- Row 8 / Column 5 → 3 (Hidden Single)
- Row 5 / Column 7 → 3 (Hidden Single)
- Row 5 / Column 9 → 4 (Naked Single)
- Row 9 / Column 9 → 1 (Naked Single)
- Row 8 / Column 9 → 8 (Naked Single)
- Row 2 / Column 9 → 5 (Naked Single)
- Row 3 / Column 9 → 3 (Full House)
- Row 9 / Column 7 → 9 (Hidden Single)
- Row 6 / Column 4 → 4 (Hidden Single)
- Row 8 / Column 2 → 1 (Hidden Single)
- Row 7 / Column 6 → 8 (Hidden Single)
- Row 6 / Column 8 → 5 (Hidden Single)
- Row 4 / Column 8 → 2 (Full House)
- Row 9 / Column 4 → 5 (Hidden Single)
- Row 4 / Column 6 → 5 (Hidden Single)
- Row 2 / Column 4 → 7 (Hidden Single)
- Row 9 / Column 5 → 7 (Hidden Single)
- Row 2 / Column 8 → 1 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 2 in b5 => r5c13<>2
- Locked Candidates Type 1 (Pointing): 2 in b8 => r5c6<>2
- Locked Candidates Type 1 (Pointing): 4 in b8 => r1c6<>4
- Locked Candidates Type 1 (Pointing): 6 in b9 => r8c13<>6
- Naked Triple: 2,6,8 in r2c13,r3c2 => r1c13<>6, r1c1<>8
- Skyscraper: 8 in r2c1,r4c2 (connected by r24c5) => r3c2,r5c1<>8
- Row 4 / Column 2 → 8 (Hidden Single)
- Row 4 / Column 5 → 6 (Full House)
- Row 5 / Column 6 → 1 (Naked Single)
- Row 1 / Column 6 → 6 (Naked Single)
- Row 2 / Column 1 → 8 (Hidden Single)
- Row 1 / Column 4 → 1 (Hidden Single)
- Locked Candidates Type 2 (Claiming): 2 in c1 => r8c3,r9c2<>2
- XY-Wing: 3/7/5 in r17c1,r8c3 => r1c3,r8c1<>5
- Row 1 / Column 3 → 3 (Naked Single)
- Row 1 / Column 1 → 5 (Naked Single)
- Row 6 / Column 3 → 2 (Naked Single)
- Row 6 / Column 2 → 3 (Full House)
- Row 2 / Column 3 → 6 (Naked Single)
- Row 3 / Column 2 → 2 (Full House)
- Row 7 / Column 2 → 4 (Naked Single)
- Row 9 / Column 2 → 6 (Full House)
- Row 2 / Column 7 → 4 (Naked Single)
- Row 2 / Column 5 → 2 (Full House)
- Row 8 / Column 7 → 6 (Full House)
- Row 5 / Column 3 → 7 (Naked Single)
- Row 5 / Column 1 → 6 (Full House)
- Row 8 / Column 3 → 5 (Full House)
- Row 3 / Column 4 → 8 (Naked Single)
- Row 1 / Column 5 → 4 (Full House)
- Row 1 / Column 8 → 8 (Full House)
- Row 5 / Column 5 → 8 (Full House)
- Row 3 / Column 8 → 6 (Full House)
- Row 5 / Column 4 → 2 (Full House)
- Row 7 / Column 8 → 7 (Naked Single)
- Row 7 / Column 1 → 3 (Full House)
- Row 8 / Column 8 → 4 (Full House)
- Row 9 / Column 1 → 2 (Naked Single)
- Row 8 / Column 1 → 7 (Full House)
- Row 8 / Column 6 → 2 (Full House)
- Row 9 / Column 6 → 4 (Full House)
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