Solution for Evil Sudoku #2437286954140
2
9
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9
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5
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5
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1
This Sudoku Puzzle has 61 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), Naked Triple, Hidden Pair, Skyscraper, Uniqueness Test 1 techniques.
Naked Single
Explanation
Hidden Single
Explanation
Hidden Pair
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 4 / Column 2 → 5 (Naked Single)
- Row 4 / Column 3 → 4 (Naked Single)
- Row 1 / Column 1 → 2 (Hidden Single)
- Row 5 / Column 1 → 8 (Hidden Single)
- Row 2 / Column 3 → 3 (Hidden Single)
- Row 5 / Column 8 → 9 (Hidden Single)
- Row 7 / Column 3 → 9 (Hidden Single)
- Row 8 / Column 7 → 2 (Hidden Single)
- Row 8 / Column 2 → 1 (Naked Single)
- Row 9 / Column 1 → 6 (Naked Single)
- Row 7 / Column 1 → 5 (Naked Single)
- Row 9 / Column 3 → 2 (Full House)
- Row 6 / Column 3 → 6 (Naked Single)
- Row 3 / Column 3 → 5 (Full House)
- Row 5 / Column 2 → 2 (Full House)
- Row 6 / Column 8 → 8 (Hidden Single)
- Row 8 / Column 8 → 4 (Naked Single)
- Row 8 / Column 9 → 8 (Naked Single)
- Row 6 / Column 5 → 2 (Hidden Single)
- Row 1 / Column 9 → 5 (Hidden Single)
- Row 2 / Column 1 → 4 (Hidden Single)
- Row 3 / Column 1 → 1 (Full House)
- Row 7 / Column 4 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 1 in b6 => r17c7<>1
- Row 2 / Column 8 → 1 (Hidden Single)
- Row 7 / Column 8 → 7 (Full House)
- Naked Triple: 4,6,7 in r3c279 => r3c5<>6, r3c6<>7
- Hidden Pair: 6,7 in r15c4 => r1c4<>1
- Row 1 / Column 6 → 1 (Hidden Single)
- Naked Triple: 3,8,9 in r349c6 => r5c6<>3
- Skyscraper: 3 in r5c5,r9c6 (connected by r59c9) => r4c6,r7c5<>3
- Row 7 / Column 5 → 1 (Naked Single)
- Row 9 / Column 4 → 8 (Naked Single)
- Row 9 / Column 6 → 3 (Naked Single)
- Row 9 / Column 9 → 1 (Full House)
- Uniqueness Test 1: 8/9 in r3c56,r4c56 => r4c5<>8, r4c5<>9
- Row 4 / Column 5 → 3 (Naked Single)
- Row 4 / Column 7 → 1 (Naked Single)
- Row 5 / Column 5 → 6 (Naked Single)
- Row 4 / Column 4 → 9 (Naked Single)
- Row 4 / Column 6 → 8 (Full House)
- Row 6 / Column 7 → 4 (Naked Single)
- Row 5 / Column 9 → 3 (Full House)
- Row 2 / Column 5 → 5 (Naked Single)
- Row 5 / Column 4 → 7 (Naked Single)
- Row 5 / Column 6 → 4 (Full House)
- Row 8 / Column 4 → 5 (Naked Single)
- Row 8 / Column 5 → 9 (Full House)
- Row 3 / Column 5 → 8 (Full House)
- Row 3 / Column 6 → 9 (Naked Single)
- Row 6 / Column 6 → 5 (Naked Single)
- Row 2 / Column 6 → 7 (Full House)
- Row 1 / Column 4 → 6 (Full House)
- Row 6 / Column 4 → 1 (Full House)
- Row 2 / Column 2 → 6 (Full House)
- Row 1 / Column 7 → 7 (Full House)
- Row 3 / Column 2 → 7 (Full House)
- Row 7 / Column 9 → 6 (Naked Single)
- Row 3 / Column 9 → 4 (Full House)
- Row 3 / Column 7 → 6 (Full House)
- Row 7 / Column 7 → 3 (Full House)
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