Solution for Evil Sudoku #1147698521342
7
1
3
8
5
2
6
9
4
4
6
8
1
9
7
2
3
5
9
5
2
4
6
3
7
8
1
2
4
7
1
3
6
9
8
5
8
5
9
7
2
4
3
1
6
3
1
6
8
9
5
2
4
7
5
2
9
3
7
8
4
6
1
6
8
3
5
4
1
9
7
2
1
7
4
6
2
9
5
3
8
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 8 → 8 (Hidden Single)
- Row 6 / Column 6 → 6 (Hidden Single)
- Row 4 / Column 9 → 6 (Hidden Single)
- Row 7 / Column 7 → 1 (Hidden Single)
- Row 2 / Column 5 → 9 (Hidden Single)
- Row 7 / Column 3 → 9 (Hidden Single)
- Row 6 / Column 1 → 9 (Hidden Single)
- Row 4 / Column 4 → 8 (Hidden Single)
- Row 8 / Column 2 → 7 (Hidden Single)
- Row 7 / Column 5 → 8 (Hidden Single)
- Row 3 / Column 1 → 6 (Hidden Single)
- Row 2 / Column 8 → 6 (Hidden Single)
- Row 4 / Column 7 → 3 (Hidden Single)
- Row 6 / Column 5 → 1 (Hidden Single)
- Row 5 / Column 1 → 1 (Hidden Single)
- Row 9 / Column 2 → 6 (Hidden Single)
- Row 4 / Column 3 → 7 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 2 in b2 => r8c4<>2
- Locked Candidates Type 1 (Pointing): 7 in b5 => r5c9<>7
- Locked Candidates Type 1 (Pointing): 5 in b8 => r8c8<>5
- Naked Pair: 3,4 in r3c35 => r3c4<>4
- X-Wing: 3 r27 c69 => r1c9,r89c6<>3
- Swordfish: 5 c378 r169 => r1c29,r6c9<>5
- Row 1 / Column 9 → 2 (Naked Single)
- Row 3 / Column 7 → 7 (Naked Single)
- Row 3 / Column 4 → 2 (Naked Single)
- Row 6 / Column 9 → 7 (Hidden Single)
- Naked Pair: 1,4 in r1c24 => r1c3<>4
- Empty Rectangle: 4 in b4 (r3c35) => r4c5<>4
- Row 4 / Column 5 → 5 (Naked Single)
- Row 2 / Column 2 → 5 (Hidden Single)
- Row 1 / Column 3 → 3 (Naked Single)
- Row 2 / Column 9 → 3 (Naked Single)
- Row 1 / Column 8 → 5 (Full House)
- Row 3 / Column 3 → 4 (Naked Single)
- Row 1 / Column 2 → 1 (Full House)
- Row 3 / Column 5 → 3 (Full House)
- Row 6 / Column 3 → 5 (Full House)
- Row 1 / Column 4 → 4 (Full House)
- Row 8 / Column 5 → 4 (Full House)
- Row 7 / Column 9 → 4 (Naked Single)
- Row 5 / Column 9 → 5 (Full House)
- Row 6 / Column 7 → 2 (Naked Single)
- Row 6 / Column 8 → 4 (Full House)
- Row 9 / Column 7 → 5 (Full House)
- Row 5 / Column 4 → 7 (Naked Single)
- Row 5 / Column 6 → 4 (Full House)
- Row 9 / Column 6 → 2 (Naked Single)
- Row 7 / Column 2 → 2 (Naked Single)
- Row 7 / Column 6 → 3 (Full House)
- Row 4 / Column 2 → 4 (Full House)
- Row 4 / Column 1 → 2 (Full House)
- Row 2 / Column 4 → 1 (Naked Single)
- Row 2 / Column 6 → 7 (Full House)
- Row 8 / Column 6 → 1 (Full House)
- Row 8 / Column 4 → 5 (Full House)
- Row 9 / Column 8 → 3 (Naked Single)
- Row 8 / Column 8 → 2 (Full House)
- Row 8 / Column 1 → 3 (Full House)
- Row 9 / Column 1 → 4 (Full House)
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