Solution for Evil Sudoku #2167825143943
8
6
3
7
5
4
1
9
2
9
1
5
2
3
8
7
4
6
4
2
7
1
9
6
8
5
3
2
8
9
3
4
7
5
1
6
1
5
7
6
2
9
3
8
4
6
3
4
5
1
8
9
7
2
9
2
1
4
3
8
6
7
5
4
6
3
5
7
1
8
9
2
7
8
5
2
6
9
3
4
1
This Sudoku Puzzle has 60 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), undefined, Naked Pair, Empty Rectangle techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 7 / Column 4 → 4 (Naked Single)
- Row 8 / Column 4 → 5 (Naked Single)
- Row 2 / Column 2 → 5 (Hidden Single)
- Row 5 / Column 6 → 9 (Hidden Single)
- Row 3 / Column 6 → 6 (Hidden Single)
- Row 4 / Column 6 → 7 (Naked Single)
- Row 4 / Column 5 → 5 (Naked Single)
- Row 8 / Column 6 → 1 (Naked Single)
- Row 2 / Column 6 → 8 (Full House)
- Row 4 / Column 7 → 6 (Naked Single)
- Row 4 / Column 1 → 2 (Full House)
- Row 5 / Column 2 → 4 (Hidden Single)
- Row 6 / Column 9 → 2 (Hidden Single)
- Row 2 / Column 4 → 2 (Hidden Single)
- Row 5 / Column 7 → 5 (Hidden Single)
- Row 9 / Column 3 → 5 (Hidden Single)
- Row 6 / Column 5 → 8 (Hidden Single)
- Row 3 / Column 3 → 2 (Hidden Single)
- Row 1 / Column 8 → 2 (Hidden Single)
- Row 7 / Column 3 → 1 (Hidden Single)
- Row 1 / Column 7 → 4 (Hidden Single)
- Row 9 / Column 8 → 4 (Hidden Single)
- Row 8 / Column 8 → 6 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 8 in b1 => r1c9<>8
- X-Wing: 7 r27 c17 => r159c1,r9c7<>7
- Row 5 / Column 3 → 7 (Hidden Single)
- X-Wing: 9 r27 c18 => r9c1<>9
- Naked Pair: 3,6 in r59c1 => r12c1<>3, r1c1<>6
- Row 1 / Column 1 → 8 (Naked Single)
- Row 8 / Column 3 → 8 (Hidden Single)
- Empty Rectangle: 3 in b1 (r8c29) => r1c9<>3
- XY-Wing: 1/9/7 in r1c9,r2c18 => r1c2,r2c7<>7
- Row 1 / Column 9 → 7 (Hidden Single)
- Row 2 / Column 1 → 7 (Hidden Single)
- Row 7 / Column 1 → 9 (Naked Single)
- Row 7 / Column 8 → 8 (Naked Single)
- Row 7 / Column 7 → 7 (Full House)
- Row 5 / Column 8 → 1 (Naked Single)
- Row 2 / Column 8 → 9 (Full House)
- Row 5 / Column 9 → 8 (Full House)
- Row 3 / Column 9 → 3 (Naked Single)
- Row 2 / Column 7 → 1 (Naked Single)
- Row 3 / Column 7 → 8 (Full House)
- Row 3 / Column 2 → 9 (Full House)
- Row 2 / Column 5 → 3 (Full House)
- Row 9 / Column 7 → 3 (Full House)
- Row 1 / Column 5 → 1 (Full House)
- Row 8 / Column 9 → 9 (Naked Single)
- Row 9 / Column 9 → 1 (Full House)
- Row 9 / Column 1 → 6 (Naked Single)
- Row 5 / Column 1 → 3 (Full House)
- Row 5 / Column 4 → 6 (Full House)
- Row 6 / Column 3 → 6 (Full House)
- Row 6 / Column 4 → 3 (Full House)
- Row 1 / Column 3 → 3 (Full House)
- Row 1 / Column 2 → 6 (Full House)
- Row 8 / Column 5 → 7 (Naked Single)
- Row 8 / Column 2 → 3 (Full House)
- Row 9 / Column 2 → 7 (Full House)
- Row 9 / Column 5 → 9 (Full House)
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