Solution for Evil Sudoku #4175968124342
8
3
1
6
2
9
7
5
4
2
5
6
4
7
1
3
8
9
4
9
7
8
5
3
6
2
1
5
7
2
1
6
8
9
4
3
9
4
3
7
2
5
6
1
8
1
8
6
9
3
4
5
7
2
4
8
5
3
9
7
2
1
6
1
3
2
5
6
4
8
9
7
7
6
9
2
1
8
3
4
5
This Sudoku Puzzle has 60 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, undefined, Swordfish, Naked Single, Empty Rectangle, Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 3 / Column 3 → 4 (Hidden Single)
- Row 3 / Column 7 → 6 (Hidden Single)
- Row 4 / Column 9 → 6 (Hidden Single)
- Row 8 / Column 5 → 6 (Hidden Single)
- Row 3 / Column 5 → 8 (Hidden Single)
- Row 7 / Column 2 → 8 (Hidden Single)
- Row 6 / Column 6 → 8 (Hidden Single)
- Row 6 / Column 1 → 9 (Hidden Single)
- Row 4 / Column 4 → 9 (Hidden Single)
- Row 2 / Column 8 → 5 (Hidden Single)
- Row 5 / Column 9 → 4 (Hidden Single)
- Row 7 / Column 9 → 9 (Hidden Single)
- Row 8 / Column 2 → 9 (Hidden Single)
- Row 6 / Column 3 → 3 (Hidden Single)
- Row 4 / Column 5 → 4 (Hidden Single)
- Row 1 / Column 8 → 9 (Hidden Single)
- Row 6 / Column 7 → 5 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 1 in b2 => r2c2<>1
- Locked Candidates Type 1 (Pointing): 5 in b5 => r5c1<>5
- Locked Candidates Type 1 (Pointing): 2 in b8 => r2c6<>2
- Naked Pair: 3,7 in r7c57 => r7c6<>7
- X-Wing: 3 r38 c14 => r12c4,r9c1<>3
- Swordfish: 1 c237 r149 => r49c1,r9c8<>1
- Row 9 / Column 1 → 2 (Naked Single)
- Row 7 / Column 3 → 5 (Naked Single)
- Row 7 / Column 6 → 2 (Naked Single)
- Row 4 / Column 1 → 5 (Hidden Single)
- Naked Pair: 4,7 in r9c68 => r9c7<>7
- Empty Rectangle: 7 in b6 (r7c57) => r6c5<>7
- Row 6 / Column 5 → 1 (Naked Single)
- Row 2 / Column 6 → 1 (Hidden Single)
- Row 5 / Column 1 → 1 (Hidden Single)
- Row 4 / Column 3 → 2 (Naked Single)
- Row 1 / Column 3 → 1 (Full House)
- Row 4 / Column 2 → 7 (Full House)
- Row 4 / Column 7 → 1 (Full House)
- Row 8 / Column 1 → 3 (Naked Single)
- Row 3 / Column 1 → 7 (Full House)
- Row 9 / Column 2 → 1 (Full House)
- Row 9 / Column 7 → 3 (Naked Single)
- Row 7 / Column 7 → 7 (Full House)
- Row 7 / Column 5 → 3 (Full House)
- Row 2 / Column 5 → 7 (Full House)
- Row 3 / Column 8 → 2 (Naked Single)
- Row 3 / Column 4 → 3 (Full House)
- Row 9 / Column 8 → 4 (Naked Single)
- Row 8 / Column 8 → 1 (Full House)
- Row 6 / Column 8 → 7 (Full House)
- Row 9 / Column 6 → 7 (Full House)
- Row 6 / Column 9 → 2 (Full House)
- Row 1 / Column 4 → 2 (Naked Single)
- Row 2 / Column 4 → 4 (Full House)
- Row 2 / Column 9 → 3 (Naked Single)
- Row 1 / Column 9 → 7 (Full House)
- Row 1 / Column 2 → 3 (Full House)
- Row 2 / Column 2 → 2 (Full House)
- Row 5 / Column 6 → 5 (Naked Single)
- Row 5 / Column 4 → 7 (Full House)
- Row 8 / Column 4 → 5 (Full House)
- Row 8 / Column 6 → 4 (Full House)
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