Solution for Evil Sudoku #4176158432940
1
2
9
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8
6
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7
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6
5
4
3
1
7
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9
8
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7
8
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9
2
4
6
1
8
1
7
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3
5
9
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4
6
9
7
8
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5
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3
2
3
5
9
4
6
1
8
7
6
5
8
7
9
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9
3
2
8
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1
7
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7
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4
6
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8
5
9
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 2 / Column 4 → 3 (Naked Single)
- Row 3 / Column 4 → 2 (Naked Single)
- Row 1 / Column 5 → 5 (Hidden Single)
- Row 3 / Column 2 → 7 (Hidden Single)
- Row 3 / Column 7 → 4 (Hidden Single)
- Row 1 / Column 1 → 1 (Hidden Single)
- Row 8 / Column 5 → 4 (Hidden Single)
- Row 7 / Column 8 → 1 (Hidden Single)
- Row 2 / Column 8 → 9 (Naked Single)
- Row 1 / Column 9 → 8 (Naked Single)
- Row 1 / Column 7 → 3 (Naked Single)
- Row 3 / Column 9 → 1 (Full House)
- Row 3 / Column 6 → 8 (Naked Single)
- Row 2 / Column 5 → 1 (Full House)
- Row 3 / Column 3 → 3 (Full House)
- Row 8 / Column 6 → 5 (Hidden Single)
- Row 8 / Column 8 → 2 (Naked Single)
- Row 9 / Column 8 → 5 (Naked Single)
- Row 5 / Column 6 → 1 (Hidden Single)
- Row 9 / Column 1 → 3 (Hidden Single)
- Row 4 / Column 7 → 2 (Hidden Single)
- Row 1 / Column 2 → 2 (Hidden Single)
- Row 1 / Column 3 → 9 (Full House)
- Locked Candidates Type 1 (Pointing): 9 in b8 => r7c17<>9
- Row 8 / Column 2 → 9 (Hidden Single)
- Row 8 / Column 7 → 6 (Full House)
- Naked Triple: 2,6,8 in r279c3 => r5c3<>8, r6c3<>6
- Hidden Pair: 6,8 in r4c15 => r4c1<>9
- Row 6 / Column 1 → 9 (Hidden Single)
- Naked Triple: 4,5,7 in r6c349 => r6c5<>7
- Skyscraper: 7 in r6c9,r7c7 (connected by r67c4) => r5c7,r9c9<>7
- Row 5 / Column 7 → 9 (Naked Single)
- Row 9 / Column 9 → 9 (Naked Single)
- Row 4 / Column 9 → 5 (Naked Single)
- Row 6 / Column 9 → 7 (Full House)
- Uniqueness Test 1: 4/5 in r5c34,r6c34 => r5c4<>4, r5c4<>5
- Row 5 / Column 4 → 7 (Naked Single)
- Row 5 / Column 5 → 8 (Naked Single)
- Row 7 / Column 4 → 9 (Naked Single)
- Row 4 / Column 5 → 6 (Naked Single)
- Row 5 / Column 2 → 3 (Naked Single)
- Row 4 / Column 4 → 4 (Naked Single)
- Row 6 / Column 4 → 5 (Full House)
- Row 7 / Column 6 → 2 (Naked Single)
- Row 9 / Column 5 → 7 (Full House)
- Row 6 / Column 5 → 2 (Full House)
- Row 4 / Column 1 → 8 (Naked Single)
- Row 7 / Column 1 → 6 (Full House)
- Row 5 / Column 8 → 4 (Naked Single)
- Row 4 / Column 8 → 3 (Full House)
- Row 5 / Column 3 → 5 (Full House)
- Row 4 / Column 6 → 9 (Full House)
- Row 6 / Column 6 → 3 (Full House)
- Row 6 / Column 2 → 6 (Naked Single)
- Row 6 / Column 3 → 4 (Full House)
- Row 2 / Column 2 → 8 (Full House)
- Row 2 / Column 3 → 6 (Full House)
- Row 9 / Column 7 → 8 (Naked Single)
- Row 7 / Column 7 → 7 (Full House)
- Row 7 / Column 3 → 8 (Full House)
- Row 9 / Column 3 → 2 (Full House)
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