Solution for Evil Sudoku #1217859423642
4
3
9
9
6
8
9
7
5
2
5
8
7
6
2
5
8
4
9
8
7
9
5
9
5
3
1
5
3
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 → 5 (Hidden Single)
- Row 6 / Column 4 → 8 (Hidden Single)
- Row 5 / Column 3 → 9 (Hidden Single)
- Row 4 / Column 6 → 9 (Hidden Single)
- Row 2 / Column 2 → 7 (Hidden Single)
- Row 9 / Column 6 → 8 (Hidden Single)
- Row 8 / Column 7 → 9 (Hidden Single)
- Row 1 / Column 4 → 5 (Hidden Single)
- Row 3 / Column 3 → 5 (Hidden Single)
- Row 7 / Column 3 → 3 (Hidden Single)
- Row 7 / Column 6 → 6 (Hidden Single)
- Row 8 / Column 8 → 8 (Hidden Single)
- Row 1 / Column 7 → 8 (Hidden Single)
- Row 1 / Column 5 → 3 (Hidden Single)
- Row 5 / Column 4 → 3 (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): 2 in b6 => r4c2<>2
- Naked Pair: 1,6 in r35c7 => r4c7<>1
- X-Wing: 6 c38 r69 => r6c12,r9c9<>6
- Swordfish: 4 r378 c149 => r29c9,r9c4<>4
- Row 9 / Column 9 → 2 (Naked Single)
- Row 7 / Column 7 → 7 (Naked Single)
- Row 4 / Column 7 → 2 (Naked Single)
- Row 9 / Column 4 → 7 (Hidden Single)
- Naked Pair: 1,3 in r24c9 => r3c9<>1
- Empty Rectangle: 1 in b2 (r35c7) => r5c6<>1
- Row 5 / Column 6 → 4 (Naked Single)
- Row 2 / Column 8 → 4 (Hidden Single)
- Row 3 / Column 9 → 6 (Naked Single)
- Row 9 / Column 8 → 6 (Naked Single)
- Row 8 / Column 9 → 4 (Full House)
- Row 3 / Column 7 → 1 (Naked Single)
- Row 2 / Column 9 → 3 (Full House)
- Row 3 / Column 4 → 4 (Full House)
- Row 5 / Column 7 → 6 (Full House)
- Row 4 / Column 9 → 1 (Full House)
- Row 5 / Column 2 → 1 (Full House)
- Row 9 / Column 3 → 1 (Naked Single)
- Row 9 / Column 5 → 4 (Full House)
- Row 7 / Column 4 → 2 (Naked Single)
- Row 7 / Column 1 → 4 (Full House)
- Row 8 / Column 4 → 1 (Full House)
- Row 4 / Column 5 → 7 (Naked Single)
- Row 6 / Column 5 → 1 (Full House)
- Row 6 / Column 1 → 2 (Naked Single)
- Row 2 / Column 3 → 2 (Naked Single)
- Row 6 / Column 3 → 6 (Full House)
- Row 2 / Column 6 → 1 (Full House)
- Row 1 / Column 6 → 2 (Full House)
- Row 4 / Column 8 → 3 (Naked Single)
- Row 4 / Column 2 → 4 (Full House)
- Row 6 / Column 2 → 3 (Full House)
- Row 6 / Column 8 → 7 (Full House)
- Row 8 / Column 1 → 6 (Naked Single)
- Row 1 / Column 1 → 1 (Full House)
- Row 1 / Column 2 → 6 (Full House)
- Row 8 / Column 2 → 2 (Full House)
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