Solution for Evil Sudoku #1172713524895
8
1
4
2
6
3
7
5
7
7
2
3
8
9
8
1
4
5
1
5
6
1
7
4
2
8
6
5
2
1
5
4
9
3
7
8
3
8
4
2
6
7
9
5
1
9
9
2
3
1
3
9
4
8
4
9
5
1
3
2
6
8
2
3
3
2
5
4
8
7
1
7
8
6
1
7
6
9
4
3
5
This Sudoku Puzzle has 66 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, 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 6 / Column 2 → 7 (Hidden Single)
- Row 9 / Column 5 → 1 (Hidden Single)
- Row 2 / Column 8 → 7 (Hidden Single)
- Row 9 / Column 7 → 4 (Hidden Single)
- Row 3 / Column 8 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 4 in b1 => r1c5<>4
- Locked Candidates Type 1 (Pointing): 8 in b2 => r2c1<>8
- Locked Candidates Type 1 (Pointing): 1 in b4 => r1c3<>1
- Locked Candidates Type 1 (Pointing): 5 in b9 => r5c9<>5
- Locked Candidates Type 2 (Claiming): 3 in r9 => r78c8,r8c9<>3
- Naked Pair: 6,9 in r6c47 => r6c369<>6, r6c369<>9
- Row 6 / Column 6 → 1 (Naked Single)
- Row 6 / Column 9 → 8 (Naked Single)
- Row 6 / Column 3 → 8 (Naked Single)
- Row 4 / Column 3 → 1 (Hidden Single)
- Row 1 / Column 1 → 8 (Hidden Single)
- Row 1 / Column 3 → 4 (Hidden Single)
- Row 7 / Column 1 → 4 (Hidden Single)
- Row 2 / Column 1 → 2 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 5 in b1 => r78c2<>5
- Locked Candidates Type 1 (Pointing): 6 in b1 => r78c2<>6
- Locked Pair: 3,9 in r78c2 => r123c2,r789c3,r9c1<>9
- Row 5 / Column 3 → 9 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 5 in b4 => r9c1<>5
- Row 9 / Column 1 → 6 (Naked Single)
- Row 4 / Column 1 → 5 (Full House)
- Row 5 / Column 1 → 5 (Full House)
- Row 7 / Column 3 → 5 (Naked Single)
- Row 8 / Column 3 → 2 (Naked Single)
- Row 9 / Column 3 → 2 (Naked Single)
- Row 9 / Column 9 → 5 (Hidden Single)
- Row 9 / Column 8 → 3 (Hidden Single)
- Locked Pair: 3,6 in r5c79 => r4c7,r5c5<>3, r4c78,r5c5,r6c7<>6
- Row 5 / Column 5 → 6 (Naked Single)
- Row 4 / Column 7 → 9 (Naked Single)
- Row 4 / Column 8 → 9 (Naked Single)
- Row 6 / Column 7 → 9 (Naked Single)
- Row 2 / Column 5 → 9 (Naked Single)
- Row 5 / Column 7 → 3 (Naked Single)
- Row 5 / Column 9 → 3 (Naked Single)
- Row 6 / Column 4 → 9 (Naked Single)
- Row 4 / Column 6 → 4 (Naked Single)
- Row 7 / Column 8 → 6 (Naked Single)
- Row 8 / Column 8 → 6 (Naked Single)
- Row 1 / Column 5 → 2 (Naked Single)
- Row 7 / Column 5 → 3 (Naked Single)
- Row 4 / Column 4 → 3 (Naked Single)
- Row 7 / Column 4 → 3 (Naked Single)
- Row 8 / Column 9 → 9 (Naked Single)
- Row 3 / Column 5 → 4 (Naked Single)
- Row 7 / Column 2 → 9 (Naked Single)
- Row 8 / Column 5 → 4 (Naked Single)
- Row 1 / Column 9 → 6 (Naked Single)
- Row 1 / Column 2 → 1 (Full House)
- Row 1 / Column 7 → 1 (Full House)
- Row 3 / Column 9 → 6 (Naked Single)
- Row 8 / Column 2 → 3 (Naked Single)
- Row 2 / Column 7 → 1 (Naked Single)
- Row 3 / Column 7 → 2 (Naked Single)
- Row 3 / Column 2 → 5 (Naked Single)
- Row 2 / Column 2 → 6 (Full House)
- Row 3 / Column 6 → 5 (Naked Single)
- Row 2 / Column 4 → 8 (Naked Single)
- Row 2 / Column 6 → 8 (Naked Single)
- Row 8 / Column 6 → 8 (Naked Single)
- Row 8 / Column 4 → 5 (Naked Single)
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