Solution for Hard Sudoku #1296437512818
4
3
5
7
6
1
9
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8
9
1
7
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8
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6
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9
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7
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6
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2
8
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9
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1
7
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6
9
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8
9
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4
6
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7
5
2
9
7
5
1
4
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8
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1
8
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7
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This Sudoku Puzzle has 61 steps and it is solved using Hidden Single, Locked Triple, Naked Single, Locked Candidates Type 1 (Pointing), Naked Pair, undefined, Skyscraper, Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 8 / Column 8 → 6 (Hidden Single)
- Locked Triple: 3,4,6 in r3c456 => r1c5,r3c3<>3, r1c5,r2c46,r3c37<>4, r2c46<>6
- Row 1 / Column 5 → 1 (Naked Single)
- Row 7 / Column 5 → 6 (Naked Single)
- Locked Candidates Type 1 (Pointing): 2 in b2 => r2c8<>2
- Locked Candidates Type 1 (Pointing): 5 in b2 => r2c23<>5
- Locked Candidates Type 1 (Pointing): 5 in b8 => r7c7<>5
- Naked Pair: 3,4 in r39c5 => r46c5<>3, r4c5<>4
- X-Wing: 7 r37 c37 => r2c37,r458c7,r568c3<>7
- Skyscraper: 7 in r5c8,r8c9 (connected by r58c2) => r46c9<>7
- Row 8 / Column 9 → 7 (Hidden Single)
- Row 7 / Column 3 → 7 (Hidden Single)
- Row 3 / Column 3 → 8 (Naked Single)
- Row 3 / Column 7 → 7 (Naked Single)
- Row 8 / Column 7 → 9 (Hidden Single)
- Row 2 / Column 7 → 4 (Naked Single)
- Row 1 / Column 8 → 2 (Naked Single)
- Row 2 / Column 3 → 1 (Naked Single)
- Row 2 / Column 8 → 9 (Naked Single)
- Row 1 / Column 9 → 8 (Full House)
- Row 9 / Column 8 → 1 (Naked Single)
- Row 6 / Column 8 → 7 (Naked Single)
- Row 5 / Column 8 → 4 (Full House)
- Row 7 / Column 7 → 8 (Naked Single)
- Row 6 / Column 5 → 9 (Naked Single)
- Row 7 / Column 4 → 5 (Naked Single)
- Row 7 / Column 6 → 1 (Full House)
- Row 9 / Column 7 → 5 (Naked Single)
- Row 9 / Column 9 → 2 (Full House)
- Row 4 / Column 5 → 7 (Naked Single)
- Row 6 / Column 9 → 5 (Naked Single)
- Row 4 / Column 9 → 9 (Full House)
- Row 2 / Column 4 → 2 (Naked Single)
- Row 4 / Column 7 → 3 (Naked Single)
- Row 5 / Column 7 → 1 (Full House)
- Row 6 / Column 3 → 3 (Naked Single)
- Row 2 / Column 6 → 5 (Naked Single)
- Row 5 / Column 4 → 3 (Naked Single)
- Row 4 / Column 1 → 6 (Naked Single)
- Row 5 / Column 2 → 7 (Naked Single)
- Row 5 / Column 3 → 9 (Naked Single)
- Row 5 / Column 6 → 2 (Full House)
- Row 6 / Column 4 → 6 (Naked Single)
- Row 4 / Column 6 → 4 (Full House)
- Row 4 / Column 2 → 5 (Full House)
- Row 6 / Column 1 → 1 (Full House)
- Row 8 / Column 3 → 4 (Naked Single)
- Row 1 / Column 3 → 5 (Full House)
- Row 2 / Column 1 → 7 (Naked Single)
- Row 2 / Column 2 → 6 (Full House)
- Row 3 / Column 4 → 4 (Naked Single)
- Row 8 / Column 4 → 8 (Full House)
- Row 8 / Column 6 → 3 (Naked Single)
- Row 3 / Column 6 → 6 (Full House)
- Row 3 / Column 5 → 3 (Full House)
- Row 8 / Column 2 → 1 (Full House)
- Row 9 / Column 5 → 4 (Full House)
- Row 1 / Column 2 → 3 (Naked Single)
- Row 1 / Column 1 → 4 (Full House)
- Row 9 / Column 1 → 3 (Full House)
- Row 9 / Column 2 → 8 (Full House)
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