Solution for Evil Sudoku #1271713524895
6
1
9
8
3
3
5
4
2
3
8
5
7
4
2
1
9
6
7
2
4
9
5
6
7
3
8
7
8
5
2
2
6
7
8
1
9
2
4
5
3
8
6
7
4
1
6
7
4
9
9
2
5
3
4
7
8
3
6
2
9
5
1
2
5
3
4
1
7
8
6
1
6
1
1
8
8
5
3
4
2
This Sudoku Puzzle has 62 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Single, Full House, Locked Triple, Naked Pair, Avoidable Rectangle Type 1 techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 2 / Column 4 → 7 (Hidden Single)
- Row 8 / Column 6 → 7 (Hidden Single)
- Row 7 / Column 1 → 4 (Hidden Single)
- Row 3 / Column 4 → 1 (Hidden Single)
- Row 9 / Column 4 → 8 (Hidden Single)
- Row 7 / Column 4 → 2 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 4 in b3 => r5c9<>4
- Locked Candidates Type 1 (Pointing): 5 in b7 => r9c5<>5
- Locked Candidates Type 2 (Claiming): 6 in c4 => r46c6,r5c5<>6
- Locked Candidates Type 2 (Claiming): 9 in c4 => r46c6,r5c5<>9
- Row 5 / Column 5 → 3 (Naked Single)
- Row 6 / Column 6 → 4 (Naked Single)
- Row 4 / Column 6 → 4 (Naked Single)
- Row 7 / Column 6 → 3 (Hidden Single)
- Row 5 / Column 7 → 4 (Hidden Single)
- Row 7 / Column 5 → 5 (Hidden Single)
- Row 3 / Column 2 → 4 (Hidden Single)
- Row 9 / Column 5 → 6 (Hidden Single)
- Row 1 / Column 9 → 4 (Hidden Single)
- Row 3 / Column 9 → 8 (Hidden Single)
- Row 3 / Column 5 → 9 (Naked Single)
- Row 1 / Column 5 → 8 (Full House)
- Row 1 / Column 8 → 2 (Hidden Single)
- Locked Triple: 2,6,9 in r5c123 => r4c23,r5c89,r6c2<>6, r4c23,r5c89,r6c2<>9, r5c9,r6c2<>2
- Row 5 / Column 8 → 9 (Naked Single)
- Row 5 / Column 9 → 9 (Naked Single)
- Row 9 / Column 9 → 2 (Naked Single)
- Row 6 / Column 7 → 2 (Hidden Single)
- Row 4 / Column 4 → 9 (Hidden Single)
- Row 6 / Column 4 → 6 (Full House)
- Row 2 / Column 7 → 9 (Hidden Single)
- Row 7 / Column 7 → 6 (Naked Single)
- Row 7 / Column 8 → 1 (Full House)
- Row 7 / Column 9 → 1 (Full House)
- Row 9 / Column 7 → 3 (Naked Single)
- Row 8 / Column 7 → 8 (Full House)
- Row 8 / Column 8 → 8 (Naked Single)
- Row 2 / Column 9 → 6 (Naked Single)
- Row 2 / Column 8 → 5 (Full House)
- Row 2 / Column 2 → 3 (Full House)
- Row 2 / Column 3 → 3 (Full House)
- Row 6 / Column 8 → 5 (Naked Single)
- Row 4 / Column 8 → 6 (Naked Single)
- Row 4 / Column 3 → 5 (Naked Single)
- Row 6 / Column 2 → 8 (Naked Single)
- Row 4 / Column 2 → 8 (Naked Single)
- Row 8 / Column 1 → 3 (Hidden Single)
- Row 9 / Column 2 → 5 (Hidden Single)
- Row 9 / Column 1 → 9 (Full House)
- Row 1 / Column 3 → 9 (Hidden Single)
- Naked Pair: 2,6 in r5c12 => r5c3<>2, r5c3<>6
- Row 5 / Column 3 → 6 (Naked Single)
- Row 3 / Column 3 → 2 (Naked Single)
- Row 5 / Column 1 → 2 (Naked Single)
- Row 5 / Column 2 → 2 (Naked Single)
- Row 8 / Column 3 → 2 (Naked Single)
- Row 8 / Column 2 → 6 (Naked Single)
- Avoidable Rectangle Type 1: 2/6 in r3c13,r5c13 => r3c1<>6
- Row 3 / Column 1 → 5 (Naked Single)
- Row 1 / Column 1 → 6 (Full House)
- Row 3 / Column 6 → 6 (Full House)
- Row 1 / Column 6 → 5 (Full House)
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