Solution for Evil Sudoku #1227836451942
4
1
6
6
9
8
6
7
3
5
3
8
7
9
5
3
8
4
6
8
7
6
3
6
3
1
2
3
1
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 5 / Column 8 → 3 (Hidden Single)
- Row 6 / Column 4 → 8 (Hidden Single)
- Row 5 / Column 3 → 6 (Hidden Single)
- Row 4 / Column 6 → 6 (Hidden Single)
- Row 2 / Column 2 → 7 (Hidden Single)
- Row 9 / Column 6 → 8 (Hidden Single)
- Row 8 / Column 7 → 6 (Hidden Single)
- Row 1 / Column 4 → 3 (Hidden Single)
- Row 3 / Column 3 → 3 (Hidden Single)
- Row 7 / Column 3 → 1 (Hidden Single)
- Row 7 / Column 6 → 9 (Hidden Single)
- Row 8 / Column 8 → 8 (Hidden Single)
- Row 1 / Column 7 → 8 (Hidden Single)
- Row 1 / Column 5 → 1 (Hidden Single)
- Row 5 / Column 4 → 1 (Hidden Single)
- Row 3 / Column 6 → 7 (Hidden Single)
- Row 2 / Column 1 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 4 in b4 => r8c2<>4
- Locked Candidates Type 1 (Pointing): 7 in b5 => r9c5<>7
- Locked Candidates Type 1 (Pointing): 5 in b6 => r4c2<>5
- Naked Pair: 2,9 in r35c7 => r4c7<>2
- X-Wing: 9 c38 r69 => r6c12,r9c9<>9
- Swordfish: 4 r378 c149 => r29c9,r9c4<>4
- Row 9 / Column 9 → 5 (Naked Single)
- Row 7 / Column 7 → 7 (Naked Single)
- Row 4 / Column 7 → 5 (Naked Single)
- Row 9 / Column 4 → 7 (Hidden Single)
- Naked Pair: 1,2 in r24c9 => r3c9<>2
- Empty Rectangle: 2 in b2 (r35c7) => r5c6<>2
- Row 5 / Column 6 → 4 (Naked Single)
- Row 2 / Column 8 → 4 (Hidden Single)
- Row 3 / Column 9 → 9 (Naked Single)
- Row 9 / Column 8 → 9 (Naked Single)
- Row 8 / Column 9 → 4 (Full House)
- Row 3 / Column 7 → 2 (Naked Single)
- Row 2 / Column 9 → 1 (Full House)
- Row 3 / Column 4 → 4 (Full House)
- Row 5 / Column 7 → 9 (Full House)
- Row 4 / Column 9 → 2 (Full House)
- Row 5 / Column 2 → 2 (Full House)
- Row 9 / Column 3 → 2 (Naked Single)
- Row 9 / Column 5 → 4 (Full House)
- Row 7 / Column 4 → 5 (Naked Single)
- Row 7 / Column 1 → 4 (Full House)
- Row 8 / Column 4 → 2 (Full House)
- Row 4 / Column 5 → 7 (Naked Single)
- Row 6 / Column 5 → 2 (Full House)
- Row 6 / Column 1 → 5 (Naked Single)
- Row 2 / Column 3 → 5 (Naked Single)
- Row 6 / Column 3 → 9 (Full House)
- Row 2 / Column 6 → 2 (Full House)
- Row 1 / Column 6 → 5 (Full House)
- Row 4 / Column 8 → 1 (Naked Single)
- Row 4 / Column 2 → 4 (Full House)
- Row 6 / Column 2 → 1 (Full House)
- Row 6 / Column 8 → 7 (Full House)
- Row 8 / Column 1 → 9 (Naked Single)
- Row 1 / Column 1 → 2 (Full House)
- Row 1 / Column 2 → 9 (Full House)
- Row 8 / Column 2 → 5 (Full House)
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