Solution for Evil Sudoku #3317836259492
6
3
9
2
4
7
8
1
5
1
2
7
8
6
5
4
9
3
4
8
5
3
1
9
6
7
2
1
9
6
5
2
8
4
7
3
3
4
2
6
7
1
9
5
8
8
5
7
9
4
3
2
6
1
3
8
2
9
6
1
7
5
4
7
1
6
5
3
4
2
8
9
5
9
4
7
2
8
1
3
6
This Sudoku Puzzle has 70 steps and it is solved using Hidden Single, Locked Pair, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Full House, Naked Pair techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 1 / Column 4 → 1 (Hidden Single)
- Row 2 / Column 9 → 9 (Hidden Single)
- Row 4 / Column 2 → 9 (Hidden Single)
- Row 7 / Column 5 → 1 (Hidden Single)
- Row 1 / Column 6 → 7 (Hidden Single)
- Locked Pair: 4,6 in r78c6 => r239c6,r79c4<>4, r269c6,r79c4<>6
- Row 9 / Column 6 → 9 (Naked Single)
- Row 6 / Column 4 → 9 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 6 in b2 => r2c12<>6
- Locked Candidates Type 1 (Pointing): 1 in b4 => r4c789<>1
- Locked Candidates Type 1 (Pointing): 3 in b5 => r23c4<>3
- Locked Candidates Type 1 (Pointing): 7 in b8 => r45c4<>7
- Locked Candidates Type 1 (Pointing): 5 in b9 => r46c7<>5
- Locked Candidates Type 2 (Claiming): 3 in r1 => r2c12,r3c1<>3
- Locked Pair: 2,8 in r23c1 => r2c2,r3c3,r47c1<>8, r3c3,r79c1<>2
- Row 7 / Column 2 → 8 (Hidden Single)
- Row 7 / Column 1 → 3 (Hidden Single)
- Row 1 / Column 1 → 6 (Naked Single)
- Row 1 / Column 2 → 3 (Full House)
- Row 4 / Column 1 → 1 (Naked Single)
- Row 9 / Column 1 → 7 (Naked Single)
- Row 9 / Column 4 → 2 (Naked Single)
- Row 7 / Column 4 → 7 (Naked Single)
- Locked Candidates Type 1 (Pointing): 6 in b4 => r789c3<>6
- Naked Pair: 4,6 in r8c26 => r8c38<>4, r8c8<>6
- Locked Candidates Type 1 (Pointing): 4 in b9 => r45c9<>4
- Locked Candidates Type 1 (Pointing): 6 in b9 => r456c9<>6
- Locked Pair: 3,7 in r45c9 => r3c9,r4c7<>3, r3c9,r4c78,r5c8<>7
- Row 3 / Column 9 → 2 (Naked Single)
- Row 4 / Column 7 → 8 (Naked Single)
- Row 2 / Column 8 → 1 (Naked Single)
- Row 3 / Column 1 → 8 (Naked Single)
- Row 2 / Column 1 → 2 (Full House)
- Row 3 / Column 8 → 7 (Naked Single)
- Row 2 / Column 7 → 3 (Full House)
- Row 6 / Column 9 → 1 (Naked Single)
- Row 4 / Column 3 → 6 (Naked Single)
- Row 5 / Column 3 → 8 (Full House)
- Row 3 / Column 4 → 4 (Naked Single)
- Row 8 / Column 8 → 2 (Naked Single)
- Row 6 / Column 7 → 2 (Naked Single)
- Row 3 / Column 3 → 5 (Naked Single)
- Row 2 / Column 2 → 4 (Full House)
- Row 3 / Column 6 → 3 (Full House)
- Row 4 / Column 4 → 3 (Naked Single)
- Row 7 / Column 7 → 5 (Naked Single)
- Row 8 / Column 3 → 1 (Naked Single)
- Row 8 / Column 2 → 6 (Naked Single)
- Row 9 / Column 2 → 5 (Full House)
- Row 4 / Column 9 → 7 (Naked Single)
- Row 5 / Column 4 → 6 (Naked Single)
- Row 2 / Column 4 → 8 (Full House)
- Row 9 / Column 7 → 1 (Naked Single)
- Row 8 / Column 7 → 7 (Full House)
- Row 8 / Column 6 → 4 (Full House)
- Row 7 / Column 6 → 6 (Full House)
- Row 9 / Column 3 → 4 (Naked Single)
- Row 7 / Column 3 → 2 (Full House)
- Row 7 / Column 9 → 4 (Full House)
- Row 9 / Column 9 → 6 (Full House)
- Row 5 / Column 9 → 3 (Full House)
- Row 5 / Column 8 → 4 (Naked Single)
- Row 5 / Column 5 → 7 (Full House)
- Row 6 / Column 5 → 5 (Naked Single)
- Row 2 / Column 6 → 5 (Naked Single)
- Row 2 / Column 5 → 6 (Full House)
- Row 4 / Column 5 → 4 (Full House)
- Row 4 / Column 8 → 5 (Full House)
- Row 6 / Column 6 → 8 (Full House)
- Row 6 / Column 8 → 6 (Full House)
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