Solution for Evil Sudoku #2162948531792
8
4
1
5
7
2
9
6
3
6
5
2
9
8
3
7
1
4
7
9
3
4
6
1
8
2
5
6
1
8
3
5
9
7
2
4
4
7
5
8
2
6
1
3
9
9
3
2
1
7
4
5
8
6
4
9
5
1
8
6
2
3
7
2
6
8
3
4
7
5
9
1
3
1
7
2
5
9
6
4
8
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 4 → 6 (Hidden Single)
- Row 2 / Column 9 → 1 (Hidden Single)
- Row 4 / Column 2 → 1 (Hidden Single)
- Row 7 / Column 5 → 6 (Hidden Single)
- Row 1 / Column 6 → 2 (Hidden Single)
- Locked Pair: 7,8 in r78c6 => r239c6,r79c4<>7, r269c6,r79c4<>8
- Row 9 / Column 6 → 1 (Naked Single)
- Row 6 / Column 4 → 1 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 8 in b2 => r2c12<>8
- Locked Candidates Type 1 (Pointing): 6 in b4 => r4c789<>6
- Locked Candidates Type 1 (Pointing): 4 in b5 => r23c4<>4
- Locked Candidates Type 1 (Pointing): 2 in b8 => r45c4<>2
- Locked Candidates Type 1 (Pointing): 3 in b9 => r46c7<>3
- Locked Candidates Type 2 (Claiming): 4 in r1 => r2c12,r3c1<>4
- Locked Pair: 5,9 in r23c1 => r2c2,r3c3,r47c1<>9, r3c3,r79c1<>5
- Row 7 / Column 2 → 9 (Hidden Single)
- Row 7 / Column 1 → 4 (Hidden Single)
- Row 1 / Column 1 → 8 (Naked Single)
- Row 1 / Column 2 → 4 (Full House)
- Row 4 / Column 1 → 6 (Naked Single)
- Row 9 / Column 1 → 2 (Naked Single)
- Row 9 / Column 4 → 5 (Naked Single)
- Row 7 / Column 4 → 2 (Naked Single)
- Locked Candidates Type 1 (Pointing): 8 in b4 => r789c3<>8
- Naked Pair: 7,8 in r8c26 => r8c38<>7, r8c8<>8
- Locked Candidates Type 1 (Pointing): 7 in b9 => r45c9<>7
- Locked Candidates Type 1 (Pointing): 8 in b9 => r456c9<>8
- Locked Pair: 2,4 in r45c9 => r3c9,r4c78,r5c8<>2, r3c9,r4c7<>4
- Row 3 / Column 9 → 5 (Naked Single)
- Row 4 / Column 7 → 9 (Naked Single)
- Row 2 / Column 8 → 6 (Naked Single)
- Row 3 / Column 1 → 9 (Naked Single)
- Row 2 / Column 1 → 5 (Full House)
- Row 3 / Column 8 → 2 (Naked Single)
- Row 2 / Column 7 → 4 (Full House)
- Row 6 / Column 9 → 6 (Naked Single)
- Row 4 / Column 3 → 8 (Naked Single)
- Row 5 / Column 3 → 9 (Full House)
- Row 3 / Column 4 → 7 (Naked Single)
- Row 8 / Column 8 → 5 (Naked Single)
- Row 6 / Column 7 → 5 (Naked Single)
- Row 3 / Column 3 → 3 (Naked Single)
- Row 2 / Column 2 → 7 (Full House)
- Row 3 / Column 6 → 4 (Full House)
- Row 4 / Column 4 → 4 (Naked Single)
- Row 7 / Column 7 → 3 (Naked Single)
- Row 8 / Column 3 → 6 (Naked Single)
- Row 8 / Column 2 → 8 (Naked Single)
- Row 9 / Column 2 → 3 (Full House)
- Row 4 / Column 9 → 2 (Naked Single)
- Row 5 / Column 4 → 8 (Naked Single)
- Row 2 / Column 4 → 9 (Full House)
- Row 9 / Column 7 → 6 (Naked Single)
- Row 8 / Column 7 → 2 (Full House)
- Row 8 / Column 6 → 7 (Full House)
- Row 7 / Column 6 → 8 (Full House)
- Row 9 / Column 3 → 7 (Naked Single)
- Row 7 / Column 3 → 5 (Full House)
- Row 7 / Column 9 → 7 (Full House)
- Row 9 / Column 9 → 8 (Full House)
- Row 5 / Column 9 → 4 (Full House)
- Row 5 / Column 8 → 7 (Naked Single)
- Row 5 / Column 5 → 2 (Full House)
- Row 6 / Column 5 → 3 (Naked Single)
- Row 2 / Column 6 → 3 (Naked Single)
- Row 2 / Column 5 → 8 (Full House)
- Row 4 / Column 5 → 7 (Full House)
- Row 4 / Column 8 → 3 (Full House)
- Row 6 / Column 6 → 9 (Full House)
- Row 6 / Column 8 → 8 (Full House)
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