5
6
9
2
4
3
1
8
7
8
9
7
6
2
8
6
4
7
6
1
8
2
8
4
7
2
6
2
6
3
8
7
1
8
6
2
8
6
7
6
2
8
5
This Sudoku Puzzle has 47 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), Skyscraper, Naked Pair, undefined, Empty Rectangle techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 7 / Column 9 → 9 (Naked Single)
- Row 6 / Column 3 → 5 (Hidden Single)
- Row 8 / Column 3 → 4 (Full House)
- Row 1 / Column 5 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 4 in b9 => r6c8<>4
- Skyscraper: 5 in r2c5,r5c6 (connected by r25c7) => r3c6,r4c5<>5
- Row 5 / Column 6 → 5 (Hidden Single)
- Naked Pair: 2,3 in r37c6 => r69c6<>3
- Locked Candidates Type 1 (Pointing): 3 in b5 => r8c5<>3
- Skyscraper: 3 in r7c6,r8c7 (connected by r3c67) => r7c8,r8c4<>3
- Row 7 / Column 8 → 4 (Naked Single)
- Row 9 / Column 4 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 3 in b8 => r7c2<>3
- Row 7 / Column 2 → 5 (Naked Single)
- X-Wing: 1 c49 r18 => r1c8,r8c57<>1
- Empty Rectangle: 1 in b5 (r2c57) => r6c7<>1
- W-Wing: 3/1 in r1c4,r9c8 connected by 1 in r8c49 => r1c8<>3
- Row 1 / Column 8 → 7 (Naked Single)
- Row 1 / Column 9 → 1 (Naked Single)
- Row 1 / Column 4 → 3 (Full House)
- Row 8 / Column 9 → 7 (Full House)
- Row 2 / Column 7 → 5 (Naked Single)
- Row 2 / Column 5 → 1 (Full House)
- Row 3 / Column 6 → 2 (Naked Single)
- Row 3 / Column 4 → 5 (Full House)
- Row 7 / Column 4 → 2 (Naked Single)
- Row 7 / Column 6 → 3 (Full House)
- Row 8 / Column 4 → 1 (Full House)
- Row 8 / Column 7 → 3 (Naked Single)
- Row 9 / Column 8 → 1 (Full House)
- Row 9 / Column 6 → 9 (Naked Single)
- Row 6 / Column 6 → 1 (Full House)
- Row 8 / Column 5 → 5 (Full House)
- Row 8 / Column 2 → 9 (Full House)
- Row 9 / Column 2 → 3 (Full House)
- Row 3 / Column 7 → 9 (Naked Single)
- Row 3 / Column 8 → 3 (Full House)
- Row 6 / Column 8 → 9 (Naked Single)
- Row 4 / Column 8 → 5 (Full House)
- Row 4 / Column 7 → 1 (Naked Single)
- Row 5 / Column 7 → 4 (Naked Single)
- Row 5 / Column 1 → 9 (Full House)
- Row 6 / Column 7 → 7 (Full House)
- Row 6 / Column 5 → 3 (Naked Single)
- Row 4 / Column 5 → 9 (Full House)
- Row 4 / Column 1 → 3 (Full House)
- Row 6 / Column 1 → 4 (Full House)
Show More...