Solution for Evil Sudoku #1282713524895
1
8
3
4
2
8
7
3
7
8
2
2
5
8
7
1
8
3
7
8
1
4
1
2
5
4
This Sudoku Puzzle has 61 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Naked Single, Hidden Pair, Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Hidden Pair
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 8 / Column 8 → 8 (Hidden Single)
- Row 5 / Column 1 → 1 (Hidden Single)
- Row 7 / Column 1 → 4 (Hidden Single)
- Row 8 / Column 6 → 7 (Hidden Single)
- Row 5 / Column 8 → 7 (Hidden Single)
- Row 9 / Column 9 → 7 (Hidden Single)
- Row 1 / Column 3 → 7 (Hidden Single)
- Row 2 / Column 4 → 7 (Hidden Single)
- Row 1 / Column 9 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 1 in b2 => r3c9<>1
- Locked Candidates Type 1 (Pointing): 2 in b7 => r8c7<>2
- Locked Candidates Type 1 (Pointing): 5 in b7 => r9c5<>5
- Locked Candidates Type 2 (Claiming): 3 in c1 => r8c23,r9c2<>3
- Naked Pair: 6,9 in r47c4 => r369c4<>6, r369c4<>9
- Row 6 / Column 4 → 1 (Naked Single)
- Row 9 / Column 4 → 8 (Naked Single)
- Row 3 / Column 4 → 8 (Naked Single)
- Row 3 / Column 6 → 1 (Hidden Single)
- Hidden Pair: 4,8 in r3c23 => r3c2<>2, r3c23<>5, r3c23<>6, r3c23<>9
- Row 3 / Column 2 → 4 (Naked Single)
- Row 3 / Column 3 → 4 (Naked Single)
- Row 8 / Column 2 → 2 (Hidden Single)
- Row 4 / Column 6 → 4 (Hidden Single)
- Row 5 / Column 7 → 4 (Hidden Single)
- Row 7 / Column 6 → 3 (Hidden Single)
- Row 5 / Column 5 → 3 (Hidden Single)
- Row 5 / Column 9 → 2 (Hidden Single)
- Row 7 / Column 7 → 2 (Hidden Single)
- Row 7 / Column 5 → 5 (Hidden Single)
- Row 1 / Column 6 → 5 (Hidden Single)
- Row 3 / Column 1 → 2 (Hidden Single)
- Row 1 / Column 8 → 2 (Hidden Single)
- Row 6 / Column 6 → 6 (Hidden Single)
- Row 4 / Column 4 → 9 (Full House)
- Row 7 / Column 4 → 6 (Naked Single)
- Row 9 / Column 5 → 9 (Full House)
- Row 1 / Column 5 → 6 (Full House)
- Row 3 / Column 5 → 6 (Full House)
- Row 1 / Column 1 → 9 (Full House)
- Row 3 / Column 9 → 9 (Naked Single)
- Row 7 / Column 9 → 1 (Naked Single)
- Row 2 / Column 9 → 6 (Full House)
- Row 7 / Column 8 → 9 (Full House)
- Row 2 / Column 7 → 5 (Naked Single)
- Row 2 / Column 8 → 1 (Full House)
- Row 2 / Column 2 → 3 (Full House)
- Row 2 / Column 3 → 3 (Full House)
- Row 6 / Column 8 → 5 (Naked Single)
- Row 6 / Column 7 → 9 (Full House)
- Row 4 / Column 8 → 6 (Full House)
- Row 6 / Column 2 → 9 (Full House)
- Row 4 / Column 2 → 5 (Full House)
- Row 4 / Column 3 → 5 (Full House)
- Row 5 / Column 2 → 6 (Full House)
- Row 5 / Column 3 → 6 (Full House)
- Row 9 / Column 2 → 6 (Naked Single)
- Row 8 / Column 3 → 9 (Naked Single)
- Row 8 / Column 1 → 3 (Naked Single)
- Row 8 / Column 7 → 6 (Full House)
- Row 9 / Column 7 → 3 (Full House)
- Row 9 / Column 1 → 5 (Full House)
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