Solution for Evil Sudoku #4161752849342
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8
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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 3 → 9 (Hidden Single)
- Row 3 / Column 7 → 5 (Hidden Single)
- Row 4 / Column 9 → 5 (Hidden Single)
- Row 8 / Column 5 → 5 (Hidden Single)
- Row 3 / Column 5 → 2 (Hidden Single)
- Row 7 / Column 2 → 2 (Hidden Single)
- Row 6 / Column 6 → 2 (Hidden Single)
- Row 6 / Column 1 → 7 (Hidden Single)
- Row 4 / Column 4 → 7 (Hidden Single)
- Row 2 / Column 8 → 1 (Hidden Single)
- Row 5 / Column 9 → 9 (Hidden Single)
- Row 7 / Column 9 → 7 (Hidden Single)
- Row 8 / Column 2 → 7 (Hidden Single)
- Row 6 / Column 3 → 3 (Hidden Single)
- Row 4 / Column 5 → 9 (Hidden Single)
- Row 1 / Column 8 → 7 (Hidden Single)
- Row 6 / Column 7 → 1 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 8 in b2 => r2c2<>8
- Locked Candidates Type 1 (Pointing): 1 in b5 => r5c1<>1
- Locked Candidates Type 1 (Pointing): 4 in b8 => r2c6<>4
- Naked Pair: 3,6 in r7c57 => r7c6<>6
- X-Wing: 3 r38 c14 => r12c4,r9c1<>3
- Swordfish: 8 c237 r149 => r49c1,r9c8<>8
- Row 9 / Column 1 → 4 (Naked Single)
- Row 7 / Column 3 → 1 (Naked Single)
- Row 7 / Column 6 → 4 (Naked Single)
- Row 4 / Column 1 → 1 (Hidden Single)
- Naked Pair: 6,9 in r9c68 => r9c7<>6
- Empty Rectangle: 6 in b6 (r7c57) => r6c5<>6
- Row 6 / Column 5 → 8 (Naked Single)
- Row 2 / Column 6 → 8 (Hidden Single)
- Row 5 / Column 1 → 8 (Hidden Single)
- Row 4 / Column 3 → 4 (Naked Single)
- Row 1 / Column 3 → 8 (Full House)
- Row 4 / Column 2 → 6 (Full House)
- Row 4 / Column 7 → 8 (Full House)
- Row 8 / Column 1 → 3 (Naked Single)
- Row 3 / Column 1 → 6 (Full House)
- Row 9 / Column 2 → 8 (Full House)
- Row 9 / Column 7 → 3 (Naked Single)
- Row 7 / Column 7 → 6 (Full House)
- Row 7 / Column 5 → 3 (Full House)
- Row 2 / Column 5 → 6 (Full House)
- Row 3 / Column 8 → 4 (Naked Single)
- Row 3 / Column 4 → 3 (Full House)
- Row 9 / Column 8 → 9 (Naked Single)
- Row 8 / Column 8 → 8 (Full House)
- Row 6 / Column 8 → 6 (Full House)
- Row 9 / Column 6 → 6 (Full House)
- Row 6 / Column 9 → 4 (Full House)
- Row 1 / Column 4 → 4 (Naked Single)
- Row 2 / Column 4 → 9 (Full House)
- Row 2 / Column 9 → 3 (Naked Single)
- Row 1 / Column 9 → 6 (Full House)
- Row 1 / Column 2 → 3 (Full House)
- Row 2 / Column 2 → 4 (Full House)
- Row 5 / Column 6 → 1 (Naked Single)
- Row 5 / Column 4 → 6 (Full House)
- Row 8 / Column 4 → 1 (Full House)
- Row 8 / Column 6 → 9 (Full House)
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