Solution for Evil Sudoku #1173584126943
7
4
4
9
2
3
2
1
2
6
3
9
1
8
2
9
5
1
4
4
8
6
7
8
5
8
2
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 6 → 2 (Naked Single)
- Row 8 / Column 6 → 4 (Naked Single)
- Row 5 / Column 4 → 9 (Hidden Single)
- Row 2 / Column 8 → 4 (Hidden Single)
- Row 3 / Column 4 → 7 (Hidden Single)
- Row 4 / Column 4 → 3 (Naked Single)
- Row 4 / Column 5 → 4 (Naked Single)
- Row 8 / Column 4 → 1 (Naked Single)
- Row 2 / Column 4 → 5 (Full House)
- Row 4 / Column 3 → 7 (Naked Single)
- Row 4 / Column 9 → 8 (Full House)
- Row 6 / Column 1 → 8 (Hidden Single)
- Row 5 / Column 8 → 2 (Hidden Single)
- Row 2 / Column 6 → 8 (Hidden Single)
- Row 5 / Column 3 → 4 (Hidden Single)
- Row 9 / Column 7 → 4 (Hidden Single)
- Row 6 / Column 5 → 5 (Hidden Single)
- Row 3 / Column 7 → 8 (Hidden Single)
- Row 1 / Column 2 → 8 (Hidden Single)
- Row 7 / Column 7 → 1 (Hidden Single)
- Row 1 / Column 3 → 2 (Hidden Single)
- Row 9 / Column 2 → 2 (Hidden Single)
- Row 8 / Column 2 → 7 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 5 in b3 => r1c1<>5
- X-Wing: 3 r27 c39 => r159c9,r9c3<>3
- Row 5 / Column 7 → 3 (Hidden Single)
- X-Wing: 9 r27 c29 => r9c9<>9
- Naked Pair: 6,7 in r59c9 => r12c9<>6, r1c9<>7
- Row 1 / Column 9 → 5 (Naked Single)
- Row 8 / Column 7 → 5 (Hidden Single)
- Empty Rectangle: 6 in b3 (r8c18) => r1c1<>6
- XY-Wing: 1/9/3 in r1c1,r2c29 => r1c8,r2c3<>3
- Row 1 / Column 1 → 3 (Hidden Single)
- Row 2 / Column 9 → 3 (Hidden Single)
- Row 7 / Column 9 → 9 (Naked Single)
- Row 7 / Column 2 → 5 (Naked Single)
- Row 7 / Column 3 → 3 (Full House)
- Row 5 / Column 2 → 1 (Naked Single)
- Row 2 / Column 2 → 9 (Full House)
- Row 5 / Column 1 → 5 (Full House)
- Row 3 / Column 1 → 6 (Naked Single)
- Row 2 / Column 3 → 1 (Naked Single)
- Row 3 / Column 3 → 5 (Full House)
- Row 3 / Column 8 → 9 (Full House)
- Row 2 / Column 5 → 6 (Full House)
- Row 9 / Column 3 → 6 (Full House)
- Row 1 / Column 5 → 1 (Full House)
- Row 8 / Column 1 → 9 (Naked Single)
- Row 9 / Column 1 → 1 (Full House)
- Row 9 / Column 9 → 7 (Naked Single)
- Row 5 / Column 9 → 6 (Full House)
- Row 5 / Column 6 → 7 (Full House)
- Row 6 / Column 7 → 7 (Full House)
- Row 6 / Column 6 → 6 (Full House)
- Row 1 / Column 7 → 6 (Full House)
- Row 1 / Column 8 → 7 (Full House)
- Row 8 / Column 5 → 3 (Naked Single)
- Row 8 / Column 8 → 6 (Full House)
- Row 9 / Column 8 → 3 (Full House)
- Row 9 / Column 5 → 9 (Full House)
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