Solution for Evil Sudoku #1245126738992
1
2
8
8
3
1
6
9
1
2
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7
8
7
8
2
5
7
9
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5
8
4
This Sudoku Puzzle has 71 steps and it is solved using Hidden Single, Locked Pair, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Full House, Naked Pair techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 1 / Column 8 → 8 (Hidden Single)
- Row 6 / Column 9 → 4 (Hidden Single)
- Row 8 / Column 6 → 8 (Hidden Single)
- Row 5 / Column 3 → 4 (Hidden Single)
- Row 4 / Column 9 → 5 (Hidden Single)
- Locked Pair: 6,9 in r4c23 => r4c148,r6c13<>6, r4c178,r6c13<>9
- Row 4 / Column 1 → 8 (Naked Single)
- Row 6 / Column 4 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 3 in b1 => r3c46<>3
- Locked Candidates Type 1 (Pointing): 5 in b4 => r6c56<>5
- Locked Candidates Type 1 (Pointing): 2 in b5 => r6c78<>2
- Locked Candidates Type 1 (Pointing): 6 in b6 => r89c8<>6
- Locked Candidates Type 1 (Pointing): 4 in b8 => r123c6<>4
- Locked Candidates Type 2 (Claiming): 5 in c2 => r1c13,r3c13<>5
- Locked Candidates Type 2 (Claiming): 2 in c9 => r89c8,r9c7<>2
- Locked Pair: 1,7 in r9c78 => r7c7,r9c13<>7, r7c7,r8c8,r9c36<>1
- Row 8 / Column 3 → 1 (Hidden Single)
- Row 8 / Column 9 → 2 (Hidden Single)
- Row 9 / Column 9 → 6 (Full House)
- Row 9 / Column 6 → 4 (Naked Single)
- Row 9 / Column 1 → 5 (Naked Single)
- Row 6 / Column 1 → 7 (Naked Single)
- Row 9 / Column 3 → 2 (Naked Single)
- Row 6 / Column 3 → 5 (Naked Single)
- Locked Candidates Type 1 (Pointing): 6 in b8 => r7c123<>6
- Naked Pair: 6,9 in r48c2 => r2c2<>6, r27c2<>9
- Locked Candidates Type 1 (Pointing): 6 in b1 => r1c456<>6
- Locked Candidates Type 1 (Pointing): 9 in b1 => r1c56<>9
- Locked Pair: 2,5 in r1c56 => r1c7,r3c6<>2, r1c7,r2c56,r3c6<>5
- Row 1 / Column 7 → 7 (Naked Single)
- Row 3 / Column 6 → 1 (Naked Single)
- Row 1 / Column 4 → 4 (Naked Single)
- Row 2 / Column 7 → 5 (Naked Single)
- Row 2 / Column 8 → 4 (Naked Single)
- Row 3 / Column 8 → 2 (Full House)
- Row 9 / Column 7 → 1 (Naked Single)
- Row 9 / Column 8 → 7 (Full House)
- Row 7 / Column 6 → 6 (Naked Single)
- Row 7 / Column 5 → 1 (Full House)
- Row 3 / Column 4 → 7 (Naked Single)
- Row 2 / Column 2 → 7 (Naked Single)
- Row 6 / Column 7 → 9 (Naked Single)
- Row 3 / Column 3 → 3 (Naked Single)
- Row 7 / Column 2 → 4 (Naked Single)
- Row 6 / Column 6 → 2 (Naked Single)
- Row 7 / Column 7 → 3 (Naked Single)
- Row 4 / Column 7 → 2 (Full House)
- Row 8 / Column 8 → 9 (Full House)
- Row 3 / Column 1 → 4 (Naked Single)
- Row 3 / Column 2 → 5 (Full House)
- Row 1 / Column 6 → 5 (Naked Single)
- Row 6 / Column 5 → 6 (Naked Single)
- Row 6 / Column 8 → 1 (Full House)
- Row 7 / Column 1 → 9 (Naked Single)
- Row 7 / Column 3 → 7 (Full House)
- Row 8 / Column 2 → 6 (Naked Single)
- Row 4 / Column 2 → 9 (Full House)
- Row 8 / Column 1 → 3 (Full House)
- Row 1 / Column 1 → 6 (Full House)
- Row 4 / Column 3 → 6 (Full House)
- Row 1 / Column 3 → 9 (Full House)
- Row 1 / Column 5 → 2 (Full House)
- Row 2 / Column 5 → 9 (Naked Single)
- Row 5 / Column 5 → 5 (Full House)
- Row 5 / Column 4 → 3 (Naked Single)
- Row 4 / Column 8 → 3 (Naked Single)
- Row 4 / Column 4 → 1 (Full House)
- Row 2 / Column 4 → 6 (Full House)
- Row 2 / Column 6 → 3 (Full House)
- Row 5 / Column 6 → 9 (Full House)
- Row 5 / Column 8 → 6 (Full House)
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