Solution for Evil Sudoku #1174198236592
3
1
5
8
2
6
6
4
7
6
2
7
2
3
9
4
5
6
1
9
9
3
1
6
This Sudoku Puzzle has 70 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 6 → 7 (Hidden Single)
- Row 2 / Column 1 → 6 (Hidden Single)
- Row 4 / Column 8 → 6 (Hidden Single)
- Row 7 / Column 5 → 7 (Hidden Single)
- Row 1 / Column 4 → 4 (Hidden Single)
- Locked Pair: 5,8 in r78c4 => r239c4,r79c6<>5, r269c4,r79c6<>8
- Row 9 / Column 4 → 6 (Naked Single)
- Row 6 / Column 6 → 6 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 8 in b2 => r2c89<>8
- Locked Candidates Type 1 (Pointing): 9 in b5 => r23c6<>9
- Locked Candidates Type 1 (Pointing): 7 in b6 => r4c123<>7
- Locked Candidates Type 1 (Pointing): 3 in b7 => r46c3<>3
- Locked Candidates Type 1 (Pointing): 4 in b8 => r45c6<>4
- Locked Candidates Type 2 (Claiming): 9 in r1 => r2c89,r3c9<>9
- Locked Pair: 1,2 in r23c9 => r2c8,r3c7,r47c9<>1, r3c7,r79c9<>2
- Row 7 / Column 8 → 1 (Hidden Single)
- Row 7 / Column 9 → 9 (Hidden Single)
- Row 1 / Column 9 → 8 (Naked Single)
- Row 1 / Column 8 → 9 (Full House)
- Row 4 / Column 9 → 7 (Naked Single)
- Row 9 / Column 9 → 4 (Naked Single)
- Row 9 / Column 6 → 2 (Naked Single)
- Row 7 / Column 6 → 4 (Naked Single)
- Locked Candidates Type 1 (Pointing): 8 in b6 => r789c7<>8
- Naked Pair: 5,8 in r8c48 => r8c27<>5, r8c2<>8
- Locked Candidates Type 1 (Pointing): 5 in b7 => r45c1<>5
- Locked Candidates Type 1 (Pointing): 8 in b7 => r456c1<>8
- Locked Pair: 4,9 in r45c1 => r3c1,r4c23,r5c2<>4, r3c1,r4c3<>9
- Row 3 / Column 1 → 2 (Naked Single)
- Row 4 / Column 3 → 1 (Naked Single)
- Row 2 / Column 2 → 7 (Naked Single)
- Row 3 / Column 2 → 4 (Naked Single)
- Row 2 / Column 3 → 9 (Full House)
- Row 3 / Column 9 → 1 (Naked Single)
- Row 2 / Column 9 → 2 (Full House)
- Row 6 / Column 1 → 7 (Naked Single)
- Row 4 / Column 7 → 8 (Naked Single)
- Row 5 / Column 7 → 1 (Full House)
- Row 8 / Column 2 → 2 (Naked Single)
- Row 3 / Column 6 → 5 (Naked Single)
- Row 6 / Column 3 → 2 (Naked Single)
- Row 7 / Column 3 → 3 (Naked Single)
- Row 8 / Column 7 → 7 (Naked Single)
- Row 3 / Column 7 → 3 (Naked Single)
- Row 2 / Column 8 → 5 (Full House)
- Row 3 / Column 4 → 9 (Full House)
- Row 4 / Column 6 → 9 (Naked Single)
- Row 9 / Column 3 → 7 (Naked Single)
- Row 8 / Column 3 → 4 (Full House)
- Row 9 / Column 7 → 5 (Naked Single)
- Row 7 / Column 7 → 2 (Full House)
- Row 8 / Column 8 → 8 (Naked Single)
- Row 8 / Column 4 → 5 (Full House)
- Row 9 / Column 8 → 3 (Full House)
- Row 9 / Column 1 → 8 (Full House)
- Row 7 / Column 4 → 8 (Full House)
- Row 7 / Column 1 → 5 (Full House)
- Row 4 / Column 1 → 4 (Naked Single)
- Row 5 / Column 1 → 9 (Full House)
- Row 5 / Column 6 → 8 (Naked Single)
- Row 2 / Column 6 → 1 (Full House)
- Row 5 / Column 2 → 5 (Naked Single)
- Row 5 / Column 5 → 4 (Full House)
- Row 6 / Column 5 → 3 (Naked Single)
- Row 2 / Column 4 → 3 (Naked Single)
- Row 2 / Column 5 → 8 (Full House)
- Row 4 / Column 5 → 5 (Full House)
- Row 4 / Column 2 → 3 (Full House)
- Row 6 / Column 2 → 8 (Full House)
- Row 6 / Column 4 → 1 (Full House)
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