Solution for Evil Sudoku #4196453871239
6
9
7
3
8
4
5
1
2
8
1
3
2
5
6
7
4
9
4
5
2
7
9
1
8
3
6
2
4
1
8
5
9
7
6
3
3
8
5
6
2
7
4
9
1
6
7
9
1
4
3
5
2
8
1
3
5
9
2
6
4
7
8
9
6
4
5
7
8
1
3
2
2
8
7
3
1
4
9
6
5
This Sudoku Puzzle has 56 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Naked Triple, undefined techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 6 / Column 4 → 4 (Hidden Single)
- Row 7 / Column 6 → 4 (Hidden Single)
- Row 1 / Column 2 → 9 (Hidden Single)
- Row 2 / Column 8 → 9 (Hidden Single)
- Row 5 / Column 3 → 9 (Hidden Single)
- Row 4 / Column 9 → 9 (Hidden Single)
- Row 7 / Column 7 → 2 (Hidden Single)
- Row 8 / Column 4 → 5 (Hidden Single)
- Row 4 / Column 6 → 5 (Hidden Single)
- Row 8 / Column 9 → 4 (Hidden Single)
- Row 3 / Column 8 → 3 (Hidden Single)
- Row 5 / Column 7 → 1 (Hidden Single)
- Row 4 / Column 1 → 2 (Hidden Single)
- Row 7 / Column 3 → 5 (Hidden Single)
- Row 9 / Column 9 → 5 (Hidden Single)
- Row 2 / Column 5 → 5 (Hidden Single)
- Row 8 / Column 5 → 7 (Hidden Single)
- Row 6 / Column 7 → 5 (Hidden Single)
- Row 4 / Column 8 → 7 (Hidden Single)
- Row 4 / Column 7 → 6 (Naked Single)
- Row 4 / Column 3 → 1 (Full House)
- Row 6 / Column 9 → 8 (Full House)
- Row 3 / Column 9 → 6 (Full House)
- Row 6 / Column 1 → 7 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 2 in b8 => r9c3<>2
- Naked Triple: 6,7,8 in r13c4,r2c6 => r1c5<>6
- W-Wing: 7/8 in r2c7,r3c4 connected by 8 in r1c47 => r2c6,r3c7<>7
- Row 2 / Column 6 → 6 (Naked Single)
- Row 1 / Column 4 → 8 (Naked Single)
- Row 2 / Column 1 → 3 (Naked Single)
- Row 9 / Column 6 → 2 (Naked Single)
- Row 5 / Column 6 → 7 (Full House)
- Row 1 / Column 7 → 4 (Naked Single)
- Row 3 / Column 4 → 7 (Naked Single)
- Row 5 / Column 4 → 6 (Full House)
- Row 5 / Column 5 → 2 (Full House)
- Row 2 / Column 2 → 8 (Naked Single)
- Row 2 / Column 7 → 7 (Full House)
- Row 3 / Column 7 → 8 (Full House)
- Row 1 / Column 5 → 1 (Naked Single)
- Row 1 / Column 1 → 6 (Full House)
- Row 3 / Column 5 → 4 (Full House)
- Row 7 / Column 1 → 1 (Full House)
- Row 3 / Column 3 → 2 (Naked Single)
- Row 3 / Column 2 → 1 (Full House)
- Row 8 / Column 3 → 6 (Naked Single)
- Row 6 / Column 3 → 3 (Naked Single)
- Row 6 / Column 2 → 6 (Full House)
- Row 9 / Column 3 → 8 (Full House)
- Row 7 / Column 2 → 3 (Naked Single)
- Row 8 / Column 2 → 2 (Full House)
- Row 8 / Column 8 → 1 (Full House)
- Row 9 / Column 8 → 6 (Naked Single)
- Row 7 / Column 8 → 8 (Full House)
- Row 7 / Column 5 → 6 (Full House)
- Row 9 / Column 5 → 3 (Full House)
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