Solution for Evil Sudoku #1298563142740
2
9
8
6
8
3
5
1
4
1
9
7
8
8
4
3
5
1
6
9
5
2
5
6
1
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 6 / Column 2 → 4 (Naked Single)
- Row 6 / Column 3 → 2 (Naked Single)
- Row 2 / Column 7 → 5 (Hidden Single)
- Row 2 / Column 2 → 7 (Naked Single)
- Row 5 / Column 8 → 1 (Hidden Single)
- Row 3 / Column 3 → 1 (Hidden Single)
- Row 5 / Column 1 → 6 (Hidden Single)
- Row 9 / Column 1 → 5 (Hidden Single)
- Row 1 / Column 1 → 3 (Naked Single)
- Row 1 / Column 3 → 5 (Naked Single)
- Row 3 / Column 1 → 4 (Full House)
- Row 4 / Column 3 → 3 (Naked Single)
- Row 5 / Column 2 → 5 (Full House)
- Row 7 / Column 3 → 4 (Naked Single)
- Row 8 / Column 3 → 9 (Full House)
- Row 4 / Column 8 → 6 (Hidden Single)
- Row 2 / Column 8 → 2 (Naked Single)
- Row 2 / Column 9 → 6 (Naked Single)
- Row 4 / Column 5 → 5 (Hidden Single)
- Row 9 / Column 9 → 4 (Hidden Single)
- Row 3 / Column 4 → 2 (Hidden Single)
- Row 8 / Column 1 → 2 (Hidden Single)
- Row 7 / Column 1 → 7 (Full House)
- Locked Candidates Type 1 (Pointing): 7 in b6 => r39c7<>7
- Row 8 / Column 8 → 7 (Hidden Single)
- Row 3 / Column 8 → 8 (Full House)
- Naked Triple: 2,3,8 in r7c279 => r7c5<>3, r7c6<>8
- Hidden Pair: 3,8 in r59c4 => r9c4<>7
- Row 9 / Column 6 → 7 (Hidden Single)
- Naked Triple: 1,6,9 in r167c6 => r5c6<>9
- Skyscraper: 9 in r1c6,r5c5 (connected by r15c9) => r3c5,r6c6<>9
- Row 3 / Column 5 → 7 (Naked Single)
- Row 1 / Column 4 → 6 (Naked Single)
- Row 1 / Column 6 → 9 (Naked Single)
- Row 1 / Column 9 → 7 (Full House)
- Uniqueness Test 1: 1/6 in r6c56,r7c56 => r6c5<>1, r6c5<>6
- Row 6 / Column 5 → 9 (Naked Single)
- Row 5 / Column 5 → 3 (Naked Single)
- Row 6 / Column 7 → 7 (Naked Single)
- Row 5 / Column 4 → 8 (Naked Single)
- Row 8 / Column 5 → 4 (Naked Single)
- Row 4 / Column 7 → 2 (Naked Single)
- Row 5 / Column 9 → 9 (Full House)
- Row 5 / Column 6 → 2 (Full House)
- Row 6 / Column 4 → 1 (Naked Single)
- Row 6 / Column 6 → 6 (Full House)
- Row 9 / Column 4 → 3 (Naked Single)
- Row 9 / Column 7 → 8 (Full House)
- Row 2 / Column 5 → 1 (Naked Single)
- Row 2 / Column 4 → 4 (Full House)
- Row 7 / Column 5 → 6 (Full House)
- Row 4 / Column 4 → 7 (Full House)
- Row 4 / Column 6 → 4 (Full House)
- Row 8 / Column 6 → 8 (Naked Single)
- Row 7 / Column 6 → 1 (Full House)
- Row 8 / Column 2 → 3 (Full House)
- Row 7 / Column 2 → 8 (Full House)
- Row 3 / Column 9 → 3 (Naked Single)
- Row 3 / Column 7 → 9 (Full House)
- Row 7 / Column 7 → 3 (Full House)
- Row 7 / Column 9 → 2 (Full House)
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