Solution for Evil Sudoku #1134257618942
4
7
1
5
2
7
6
5
3
8
9
2
7
5
1
9
8
7
5
6
7
8
2
5
4
4
2
5
7
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 → 7 (Hidden Single)
- Row 6 / Column 6 → 2 (Hidden Single)
- Row 4 / Column 9 → 2 (Hidden Single)
- Row 7 / Column 7 → 8 (Hidden Single)
- Row 2 / Column 5 → 5 (Hidden Single)
- Row 7 / Column 3 → 5 (Hidden Single)
- Row 6 / Column 1 → 5 (Hidden Single)
- Row 4 / Column 4 → 7 (Hidden Single)
- Row 8 / Column 2 → 4 (Hidden Single)
- Row 7 / Column 5 → 7 (Hidden Single)
- Row 3 / Column 1 → 2 (Hidden Single)
- Row 2 / Column 8 → 2 (Hidden Single)
- Row 4 / Column 7 → 9 (Hidden Single)
- Row 6 / Column 5 → 8 (Hidden Single)
- Row 5 / Column 1 → 8 (Hidden Single)
- Row 9 / Column 2 → 2 (Hidden Single)
- Row 4 / Column 3 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 1 in b2 => r8c4<>1
- Locked Candidates Type 1 (Pointing): 4 in b5 => r5c9<>4
- Locked Candidates Type 1 (Pointing): 6 in b8 => r8c8<>6
- Naked Pair: 3,9 in r3c35 => r3c4<>3
- X-Wing: 9 r27 c69 => r1c9,r89c6<>9
- Swordfish: 6 c378 r169 => r1c29,r6c9<>6
- Row 1 / Column 9 → 1 (Naked Single)
- Row 3 / Column 7 → 4 (Naked Single)
- Row 3 / Column 4 → 1 (Naked Single)
- Row 6 / Column 9 → 4 (Hidden Single)
- Naked Pair: 3,8 in r1c24 => r1c3<>3
- Empty Rectangle: 3 in b4 (r3c35) => r4c5<>3
- Row 4 / Column 5 → 6 (Naked Single)
- Row 2 / Column 2 → 6 (Hidden Single)
- Row 1 / Column 3 → 9 (Naked Single)
- Row 2 / Column 9 → 9 (Naked Single)
- Row 1 / Column 8 → 6 (Full House)
- Row 3 / Column 3 → 3 (Naked Single)
- Row 1 / Column 2 → 8 (Full House)
- Row 3 / Column 5 → 9 (Full House)
- Row 6 / Column 3 → 6 (Full House)
- Row 1 / Column 4 → 3 (Full House)
- Row 8 / Column 5 → 3 (Full House)
- Row 7 / Column 9 → 3 (Naked Single)
- Row 5 / Column 9 → 6 (Full House)
- Row 6 / Column 7 → 1 (Naked Single)
- Row 6 / Column 8 → 3 (Full House)
- Row 9 / Column 7 → 6 (Full House)
- Row 5 / Column 4 → 4 (Naked Single)
- Row 5 / Column 6 → 3 (Full House)
- Row 9 / Column 6 → 1 (Naked Single)
- Row 7 / Column 2 → 1 (Naked Single)
- Row 7 / Column 6 → 9 (Full House)
- Row 4 / Column 2 → 3 (Full House)
- Row 4 / Column 1 → 1 (Full House)
- Row 2 / Column 4 → 8 (Naked Single)
- Row 2 / Column 6 → 4 (Full House)
- Row 8 / Column 6 → 8 (Full House)
- Row 8 / Column 4 → 6 (Full House)
- Row 9 / Column 8 → 9 (Naked Single)
- Row 8 / Column 8 → 1 (Full House)
- Row 8 / Column 1 → 9 (Full House)
- Row 9 / Column 1 → 3 (Full House)
Show More...