Solution for Evil Sudoku #2281439275640
6
7
2
3
5
4
9
1
8
8
1
3
9
2
7
4
6
5
4
5
9
1
6
8
2
3
7
1
3
5
8
2
7
4
9
6
7
4
6
5
9
1
3
8
2
9
8
2
6
4
3
5
7
1
5
4
9
2
6
3
7
8
1
2
3
8
1
7
4
6
5
9
7
1
6
8
9
5
3
2
4
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 6 / Column 8 → 7 (Naked Single)
- Row 6 / Column 7 → 5 (Naked Single)
- Row 2 / Column 3 → 4 (Hidden Single)
- Row 2 / Column 8 → 6 (Naked Single)
- Row 5 / Column 2 → 2 (Hidden Single)
- Row 8 / Column 7 → 8 (Hidden Single)
- Row 5 / Column 9 → 3 (Hidden Single)
- Row 3 / Column 7 → 2 (Hidden Single)
- Row 9 / Column 9 → 4 (Hidden Single)
- Row 1 / Column 9 → 9 (Naked Single)
- Row 1 / Column 7 → 4 (Naked Single)
- Row 3 / Column 9 → 7 (Full House)
- Row 4 / Column 7 → 9 (Naked Single)
- Row 5 / Column 8 → 4 (Full House)
- Row 7 / Column 7 → 7 (Full House)
- Row 4 / Column 2 → 3 (Hidden Single)
- Row 2 / Column 2 → 5 (Naked Single)
- Row 2 / Column 1 → 3 (Naked Single)
- Row 4 / Column 5 → 4 (Hidden Single)
- Row 9 / Column 1 → 7 (Hidden Single)
- Row 3 / Column 6 → 5 (Hidden Single)
- Row 8 / Column 9 → 5 (Hidden Single)
- Row 7 / Column 9 → 6 (Full House)
- Locked Candidates Type 1 (Pointing): 6 in b4 => r39c3<>6
- Row 8 / Column 2 → 6 (Hidden Single)
- Row 3 / Column 2 → 1 (Full House)
- Naked Triple: 1,5,9 in r7c138 => r7c4<>1, r7c5<>9
- Hidden Pair: 1,9 in r59c6 => r9c6<>6
- Row 9 / Column 4 → 6 (Hidden Single)
- Naked Triple: 2,3,8 in r167c4 => r5c4<>8
- Skyscraper: 8 in r1c4,r5c5 (connected by r15c1) => r3c5,r6c4<>8
- Row 3 / Column 5 → 6 (Naked Single)
- Row 1 / Column 6 → 3 (Naked Single)
- Row 1 / Column 4 → 8 (Naked Single)
- Row 1 / Column 1 → 6 (Full House)
- Uniqueness Test 1: 2/3 in r6c45,r7c45 => r6c5<>2, r6c5<>3
- Row 6 / Column 5 → 8 (Naked Single)
- Row 5 / Column 5 → 9 (Naked Single)
- Row 6 / Column 3 → 6 (Naked Single)
- Row 5 / Column 6 → 1 (Naked Single)
- Row 8 / Column 5 → 7 (Naked Single)
- Row 4 / Column 3 → 5 (Naked Single)
- Row 5 / Column 1 → 8 (Full House)
- Row 5 / Column 4 → 5 (Full House)
- Row 6 / Column 6 → 2 (Naked Single)
- Row 6 / Column 4 → 3 (Full House)
- Row 9 / Column 6 → 9 (Naked Single)
- Row 9 / Column 3 → 1 (Full House)
- Row 2 / Column 5 → 2 (Naked Single)
- Row 2 / Column 6 → 7 (Full House)
- Row 7 / Column 5 → 3 (Full House)
- Row 4 / Column 6 → 6 (Full House)
- Row 4 / Column 4 → 7 (Full House)
- Row 8 / Column 4 → 1 (Naked Single)
- Row 7 / Column 4 → 2 (Full House)
- Row 8 / Column 8 → 9 (Full House)
- Row 7 / Column 8 → 1 (Full House)
- Row 3 / Column 1 → 9 (Naked Single)
- Row 3 / Column 3 → 8 (Full House)
- Row 7 / Column 3 → 9 (Full House)
- Row 7 / Column 1 → 5 (Full House)
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