Solution for Evil Sudoku #2153941278640
2
5
9
4
9
3
1
7
7
2
8
9
5
9
1
3
4
2
6
5
3
2
3
4
8
5
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 8 / Column 4 → 7 (Naked Single)
- Row 7 / Column 4 → 8 (Naked Single)
- Row 3 / Column 8 → 9 (Hidden Single)
- Row 8 / Column 8 → 6 (Naked Single)
- Row 9 / Column 1 → 9 (Hidden Single)
- Row 9 / Column 9 → 1 (Naked Single)
- Row 7 / Column 9 → 9 (Naked Single)
- Row 9 / Column 5 → 4 (Naked Single)
- Row 9 / Column 7 → 7 (Naked Single)
- Row 7 / Column 7 → 2 (Full House)
- Row 7 / Column 6 → 1 (Naked Single)
- Row 8 / Column 5 → 9 (Full House)
- Row 7 / Column 3 → 7 (Naked Single)
- Row 7 / Column 2 → 5 (Full House)
- Row 2 / Column 5 → 2 (Hidden Single)
- Row 5 / Column 6 → 9 (Hidden Single)
- Row 2 / Column 6 → 4 (Hidden Single)
- Row 2 / Column 8 → 8 (Naked Single)
- Row 1 / Column 8 → 4 (Naked Single)
- Row 1 / Column 1 → 7 (Hidden Single)
- Row 9 / Column 2 → 8 (Hidden Single)
- Row 9 / Column 3 → 6 (Full House)
- Row 6 / Column 7 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 6 in b2 => r3c17<>6
- Row 2 / Column 2 → 6 (Hidden Single)
- Row 2 / Column 7 → 3 (Full House)
- Naked Triple: 1,3,8 in r138c3 => r4c3<>3, r5c3<>1
- Hidden Pair: 1,3 in r6c15 => r6c1<>6
- Row 4 / Column 1 → 6 (Hidden Single)
- Naked Triple: 2,4,5 in r4c349 => r4c5<>5
- Skyscraper: 5 in r3c7,r4c9 (connected by r34c4) => r1c9,r5c7<>5
- Row 1 / Column 9 → 6 (Naked Single)
- Row 5 / Column 7 → 6 (Naked Single)
- Row 6 / Column 9 → 4 (Naked Single)
- Row 4 / Column 9 → 5 (Full House)
- Uniqueness Test 1: 2/4 in r4c34,r5c34 => r5c4<>2, r5c4<>4
- Row 5 / Column 4 → 5 (Naked Single)
- Row 3 / Column 4 → 6 (Naked Single)
- Row 5 / Column 5 → 1 (Naked Single)
- Row 3 / Column 6 → 8 (Naked Single)
- Row 1 / Column 5 → 5 (Full House)
- Row 6 / Column 4 → 2 (Naked Single)
- Row 4 / Column 4 → 4 (Full House)
- Row 5 / Column 2 → 7 (Naked Single)
- Row 6 / Column 5 → 3 (Naked Single)
- Row 4 / Column 5 → 8 (Full House)
- Row 4 / Column 6 → 7 (Naked Single)
- Row 6 / Column 6 → 6 (Full House)
- Row 1 / Column 7 → 1 (Naked Single)
- Row 1 / Column 3 → 8 (Full House)
- Row 3 / Column 7 → 5 (Full House)
- Row 6 / Column 8 → 7 (Naked Single)
- Row 5 / Column 8 → 2 (Full House)
- Row 6 / Column 1 → 1 (Full House)
- Row 5 / Column 3 → 4 (Full House)
- Row 3 / Column 1 → 3 (Full House)
- Row 3 / Column 3 → 1 (Full House)
- Row 4 / Column 3 → 2 (Naked Single)
- Row 4 / Column 2 → 3 (Full House)
- Row 8 / Column 3 → 3 (Full House)
- Row 8 / Column 2 → 1 (Full House)
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