Solution for Evil Sudoku #1287713524895
9
1
5
8
3
3
6
5
5
3
6
6
7
4
2
9
8
1
8
2
4
5
9
6
7
3
4
7
4
9
1
2
2
8
6
7
6
2
3
5
9
8
1
7
4
1
5
8
4
6
7
2
5
3
4
7
8
2
9
6
3
5
1
2
3
5
4
1
9
8
8
7
9
1
1
3
8
5
6
4
2
This Sudoku Puzzle has 60 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Quadruple, Naked Single, Locked Triple, Full House 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 8 → 8 (Hidden Single)
- Row 5 / Column 1 → 1 (Hidden Single)
- Row 5 / Column 9 → 7 (Hidden Single)
- Row 7 / Column 1 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 1 in b2 => r3c9<>1
- Locked Candidates Type 1 (Pointing): 5 in b7 => r9c5<>5
- Locked Candidates Type 2 (Claiming): 3 in c1 => r8c23,r9c2<>3
- Naked Quadruple: 2,3,6,9 in r789c7,r9c9 => r7c89<>2, r7c89<>6, r7c89<>9
- Row 7 / Column 8 → 1 (Naked Single)
- Row 7 / Column 9 → 1 (Naked Single)
- Locked Triple: 5,6,9 in r2c789 => r1c8,r2c23<>5, r1c89,r2c23,r3c9<>6, r1c89,r2c23,r3c9<>9
- Row 2 / Column 2 → 3 (Naked Single)
- Row 2 / Column 3 → 3 (Naked Single)
- Row 1 / Column 8 → 2 (Naked Single)
- Row 1 / Column 9 → 4 (Naked Single)
- Row 3 / Column 9 → 4 (Naked Single)
- Row 4 / Column 6 → 3 (Hidden Single)
- Row 9 / Column 9 → 2 (Hidden Single)
- Row 6 / Column 6 → 4 (Hidden Single)
- Row 7 / Column 4 → 2 (Hidden Single)
- Row 2 / Column 9 → 6 (Hidden Single)
- Row 5 / Column 7 → 4 (Hidden Single)
- Row 6 / Column 4 → 1 (Hidden Single)
- Row 3 / Column 6 → 1 (Hidden Single)
- Row 4 / Column 2 → 4 (Hidden Single)
- Row 6 / Column 7 → 2 (Hidden Single)
- Row 2 / Column 7 → 5 (Hidden Single)
- Row 2 / Column 8 → 9 (Naked Single)
- Row 5 / Column 8 → 6 (Naked Single)
- Row 4 / Column 8 → 5 (Full House)
- Row 6 / Column 8 → 5 (Full House)
- Row 5 / Column 5 → 9 (Naked Single)
- Row 4 / Column 4 → 6 (Full House)
- Row 5 / Column 2 → 2 (Full House)
- Row 5 / Column 3 → 2 (Full House)
- Row 4 / Column 3 → 9 (Full House)
- Row 6 / Column 2 → 6 (Naked Single)
- Row 8 / Column 3 → 6 (Naked Single)
- Row 8 / Column 2 → 9 (Naked Single)
- Row 3 / Column 2 → 5 (Full House)
- Row 9 / Column 2 → 5 (Full House)
- Row 1 / Column 3 → 5 (Naked Single)
- Row 3 / Column 3 → 5 (Naked Single)
- Row 8 / Column 6 → 9 (Naked Single)
- Row 8 / Column 7 → 3 (Naked Single)
- Row 9 / Column 1 → 3 (Naked Single)
- Row 1 / Column 5 → 6 (Naked Single)
- Row 1 / Column 6 → 6 (Naked Single)
- Row 9 / Column 4 → 8 (Naked Single)
- Row 3 / Column 4 → 9 (Full House)
- Row 8 / Column 1 → 2 (Naked Single)
- Row 1 / Column 1 → 9 (Naked Single)
- Row 3 / Column 1 → 6 (Full House)
- Row 3 / Column 5 → 8 (Naked Single)
- Row 9 / Column 5 → 8 (Naked Single)
- Row 7 / Column 6 → 5 (Naked Single)
- Row 7 / Column 5 → 3 (Naked Single)
- Row 7 / Column 7 → 9 (Hidden Single)
- Row 9 / Column 7 → 6 (Full House)
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