Solution for Evil Sudoku #3136915784240
3
4
1
6
7
6
3
2
7
1
6
5
9
3
9
4
7
8
8
5
6
9
1
9
3
7
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 6 → 8 (Naked Single)
- Row 3 / Column 6 → 4 (Naked Single)
- Row 1 / Column 5 → 1 (Hidden Single)
- Row 3 / Column 8 → 3 (Hidden Single)
- Row 3 / Column 3 → 7 (Hidden Single)
- Row 1 / Column 9 → 9 (Hidden Single)
- Row 7 / Column 2 → 9 (Hidden Single)
- Row 2 / Column 2 → 2 (Naked Single)
- Row 1 / Column 1 → 5 (Naked Single)
- Row 1 / Column 3 → 8 (Naked Single)
- Row 3 / Column 1 → 9 (Full House)
- Row 3 / Column 4 → 5 (Naked Single)
- Row 2 / Column 5 → 9 (Full House)
- Row 3 / Column 7 → 8 (Full House)
- Row 8 / Column 5 → 7 (Hidden Single)
- Row 8 / Column 4 → 1 (Hidden Single)
- Row 8 / Column 2 → 4 (Naked Single)
- Row 9 / Column 2 → 1 (Naked Single)
- Row 5 / Column 4 → 9 (Hidden Single)
- Row 9 / Column 9 → 8 (Hidden Single)
- Row 4 / Column 3 → 4 (Hidden Single)
- Row 1 / Column 8 → 4 (Hidden Single)
- Row 1 / Column 7 → 2 (Full House)
- Locked Candidates Type 1 (Pointing): 2 in b8 => r7c39<>2
- Row 8 / Column 8 → 2 (Hidden Single)
- Row 8 / Column 3 → 6 (Full House)
- Naked Triple: 4,5,6 in r279c7 => r5c7<>5, r6c7<>6
- Hidden Pair: 5,6 in r4c59 => r4c9<>2
- Row 6 / Column 9 → 2 (Hidden Single)
- Naked Triple: 1,3,7 in r6c167 => r6c5<>3
- Skyscraper: 3 in r6c1,r7c3 (connected by r67c6) => r5c3,r9c1<>3
- Row 5 / Column 3 → 2 (Naked Single)
- Row 9 / Column 1 → 2 (Naked Single)
- Row 4 / Column 1 → 1 (Naked Single)
- Row 6 / Column 1 → 3 (Full House)
- Uniqueness Test 1: 1/7 in r5c67,r6c67 => r5c6<>1, r5c6<>7
- Row 5 / Column 6 → 3 (Naked Single)
- Row 5 / Column 5 → 5 (Naked Single)
- Row 7 / Column 6 → 2 (Naked Single)
- Row 4 / Column 5 → 6 (Naked Single)
- Row 5 / Column 8 → 8 (Naked Single)
- Row 4 / Column 6 → 7 (Naked Single)
- Row 6 / Column 6 → 1 (Full House)
- Row 7 / Column 4 → 4 (Naked Single)
- Row 9 / Column 5 → 3 (Full House)
- Row 6 / Column 5 → 4 (Full House)
- Row 4 / Column 9 → 5 (Naked Single)
- Row 7 / Column 9 → 6 (Full House)
- Row 5 / Column 2 → 7 (Naked Single)
- Row 4 / Column 2 → 8 (Full House)
- Row 5 / Column 7 → 1 (Full House)
- Row 4 / Column 4 → 2 (Full House)
- Row 6 / Column 4 → 8 (Full House)
- Row 6 / Column 8 → 6 (Naked Single)
- Row 6 / Column 7 → 7 (Full House)
- Row 2 / Column 8 → 5 (Full House)
- Row 2 / Column 7 → 6 (Full House)
- Row 9 / Column 3 → 5 (Naked Single)
- Row 7 / Column 3 → 3 (Full House)
- Row 7 / Column 7 → 5 (Full House)
- Row 9 / Column 7 → 4 (Full House)
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