2
8
6
9
4
1
9
2
7
6
4
8
9
7
2
3
6
1
8
2
9
9
3
2
7
2
9
6
5
2
9
1
9
2
5
1
6
8
2
5
9
This Sudoku Puzzle has 46 steps and it is solved using Naked Single, Locked Candidates Type 1 (Pointing), Naked Pair, Turbot Fish, Empty Rectangle, Full House, Skyscraper, Hidden Single techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 4 / Column 8 → 8 (Naked Single)
- Locked Candidates Type 1 (Pointing): 1 in b3 => r6c7<>1
- Locked Candidates Type 1 (Pointing): 5 in b3 => r6c7<>5
- Naked Pair: 1,5 in r3c27 => r3c6<>5
- Turbot Fish: 5 r2c6 =5= r1c4 -5- r4c4 =5= r4c2 => r2c2<>5
- Empty Rectangle: 5 in b1 (r4c24) => r1c4<>5
- Row 1 / Column 4 → 3 (Naked Single)
- Row 2 / Column 5 → 4 (Naked Single)
- Row 2 / Column 6 → 5 (Naked Single)
- Row 2 / Column 7 → 1 (Naked Single)
- Row 2 / Column 2 → 3 (Full House)
- Row 3 / Column 7 → 5 (Full House)
- Row 3 / Column 2 → 1 (Naked Single)
- Skyscraper: 4 in r4c4,r9c6 (connected by r49c2) => r56c6,r8c4<>4
- Row 8 / Column 4 → 8 (Naked Single)
- Row 9 / Column 6 → 4 (Hidden Single)
- Row 9 / Column 2 → 7 (Naked Single)
- Row 1 / Column 2 → 5 (Naked Single)
- Row 1 / Column 1 → 7 (Full House)
- Row 4 / Column 2 → 4 (Full House)
- Row 4 / Column 4 → 5 (Full House)
- Row 8 / Column 3 → 3 (Naked Single)
- Row 9 / Column 5 → 3 (Naked Single)
- Row 9 / Column 3 → 8 (Full House)
- Row 5 / Column 3 → 7 (Full House)
- Row 7 / Column 1 → 4 (Full House)
- Row 7 / Column 5 → 7 (Full House)
- Row 8 / Column 7 → 4 (Naked Single)
- Row 6 / Column 7 → 3 (Full House)
- Row 5 / Column 6 → 6 (Naked Single)
- Row 7 / Column 9 → 1 (Naked Single)
- Row 7 / Column 8 → 3 (Full House)
- Row 8 / Column 9 → 6 (Naked Single)
- Row 8 / Column 8 → 7 (Full House)
- Row 6 / Column 1 → 5 (Naked Single)
- Row 5 / Column 1 → 3 (Full House)
- Row 3 / Column 6 → 8 (Naked Single)
- Row 3 / Column 5 → 6 (Full House)
- Row 6 / Column 5 → 8 (Full House)
- Row 6 / Column 6 → 7 (Full House)
- Row 5 / Column 8 → 1 (Naked Single)
- Row 6 / Column 8 → 6 (Full House)
- Row 6 / Column 9 → 4 (Naked Single)
- Row 5 / Column 9 → 5 (Full House)
- Row 5 / Column 4 → 4 (Full House)
- Row 6 / Column 4 → 1 (Full House)
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