Solution for Evil Sudoku #1244713524895
1
8
3
4
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7
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7
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8
7
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4
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8
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4
This Sudoku Puzzle has 68 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Naked Single, Locked Pair, Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 3 / Column 2 → 4 (Hidden Single)
- Row 5 / Column 1 → 1 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 8 in b8 => r9c79<>8
- Locked Candidates Type 2 (Claiming): 3 in c1 => r8c23,r9c2<>3
- Locked Candidates Type 2 (Claiming): 8 in c9 => r1c8<>8
- Naked Triple: 3,6,9 in r4c46,r5c5 => r6c46<>6, r6c46<>9
- Row 6 / Column 4 → 1 (Naked Single)
- Row 6 / Column 6 → 1 (Naked Single)
- Row 3 / Column 9 → 1 (Hidden Single)
- Row 7 / Column 8 → 1 (Hidden Single)
- Row 1 / Column 9 → 8 (Hidden Single)
- Row 1 / Column 8 → 2 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 5 in b3 => r2c23<>5
- Locked Candidates Type 1 (Pointing): 6 in b3 => r2c234<>6
- Locked Candidates Type 1 (Pointing): 9 in b3 => r2c234<>9
- Row 2 / Column 2 → 3 (Naked Single)
- Row 2 / Column 4 → 7 (Naked Single)
- Row 2 / Column 3 → 7 (Naked Single)
- Row 8 / Column 6 → 7 (Hidden Single)
- Row 9 / Column 9 → 7 (Hidden Single)
- Row 5 / Column 8 → 7 (Hidden Single)
- Naked Triple: 5,6,9 in r1c56,r3c6 => r3c45<>6, r3c45<>9, r3c5<>5
- Row 3 / Column 4 → 8 (Naked Single)
- Row 3 / Column 5 → 8 (Naked Single)
- Naked Triple: 5,6,9 in r1c135 => r1c6<>5, r1c6<>6, r1c6<>9
- Row 1 / Column 6 → 9 (Naked Single)
- Locked Pair: 5,6 in r1c13 => r1c5,r3c13<>5, r1c5,r3c13<>6
- Row 1 / Column 5 → 6 (Naked Single)
- Row 1 / Column 1 → 5 (Naked Single)
- Row 1 / Column 3 → 5 (Naked Single)
- Row 3 / Column 6 → 5 (Naked Single)
- Row 9 / Column 2 → 5 (Hidden Single)
- Row 7 / Column 5 → 5 (Hidden Single)
- Row 4 / Column 8 → 5 (Hidden Single)
- Row 2 / Column 7 → 5 (Hidden Single)
- Row 4 / Column 2 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 6 in b5 => r4c3<>6
- Locked Candidates Type 2 (Claiming): 6 in c1 => r8c23<>6
- Row 5 / Column 3 → 6 (Hidden Single)
- Row 5 / Column 5 → 3 (Hidden Single)
- Row 4 / Column 6 → 6 (Naked Single)
- Row 9 / Column 5 → 9 (Naked Single)
- Row 4 / Column 4 → 9 (Naked Single)
- Row 4 / Column 3 → 3 (Full House)
- Row 7 / Column 6 → 3 (Naked Single)
- Locked Pair: 2,9 in r5c79 => r5c2,r6c7<>2, r5c2,r6c78<>9
- Row 5 / Column 2 → 9 (Naked Single)
- Row 5 / Column 7 → 2 (Naked Single)
- Row 5 / Column 9 → 2 (Naked Single)
- Row 6 / Column 2 → 2 (Naked Single)
- Row 8 / Column 2 → 2 (Naked Single)
- Row 8 / Column 3 → 9 (Naked Single)
- Row 3 / Column 3 → 2 (Naked Single)
- Row 7 / Column 1 → 6 (Naked Single)
- Row 3 / Column 1 → 9 (Naked Single)
- Row 8 / Column 1 → 3 (Full House)
- Row 9 / Column 1 → 3 (Full House)
- Row 7 / Column 4 → 2 (Naked Single)
- Row 7 / Column 7 → 9 (Full House)
- Row 7 / Column 9 → 9 (Full House)
- Row 9 / Column 4 → 6 (Full House)
- Row 9 / Column 7 → 6 (Naked Single)
- Row 2 / Column 9 → 6 (Naked Single)
- Row 2 / Column 8 → 9 (Full House)
- Row 6 / Column 7 → 8 (Naked Single)
- Row 8 / Column 7 → 8 (Naked Single)
- Row 8 / Column 8 → 8 (Naked Single)
- Row 6 / Column 8 → 6 (Naked Single)
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