Solution for Evil Sudoku #4451298673492
8
2
4
9
6
3
5
1
7
5
9
1
8
4
7
6
3
2
6
3
7
1
5
2
8
9
4
3
4
8
2
9
5
6
7
1
2
5
6
7
1
4
3
8
9
9
7
1
3
8
6
4
2
5
4
5
6
7
8
2
1
3
9
9
2
8
1
6
3
4
7
5
7
1
3
5
4
9
2
6
8
This Sudoku Puzzle has 71 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 8 → 3 (Hidden Single)
- Row 6 / Column 9 → 5 (Hidden Single)
- Row 8 / Column 6 → 3 (Hidden Single)
- Row 5 / Column 3 → 5 (Hidden Single)
- Row 4 / Column 9 → 1 (Hidden Single)
- Locked Pair: 4,8 in r4c23 => r4c178,r6c13<>4, r4c148,r6c13<>8
- Row 4 / Column 1 → 3 (Naked Single)
- Row 6 / Column 4 → 3 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 7 in b1 => r3c46<>7
- Locked Candidates Type 1 (Pointing): 1 in b4 => r6c56<>1
- Locked Candidates Type 1 (Pointing): 9 in b5 => r6c78<>9
- Locked Candidates Type 1 (Pointing): 8 in b6 => r89c8<>8
- Locked Candidates Type 1 (Pointing): 5 in b8 => r123c6<>5
- Locked Candidates Type 2 (Claiming): 1 in c2 => r1c13,r3c13<>1
- Locked Candidates Type 2 (Claiming): 9 in c9 => r89c8,r9c7<>9
- Locked Pair: 2,6 in r9c78 => r7c7,r9c13<>6, r7c7,r8c8,r9c36<>2
- Row 8 / Column 3 → 2 (Hidden Single)
- Row 8 / Column 9 → 9 (Hidden Single)
- Row 9 / Column 9 → 8 (Full House)
- Row 9 / Column 6 → 5 (Naked Single)
- Row 9 / Column 1 → 1 (Naked Single)
- Row 6 / Column 1 → 6 (Naked Single)
- Row 9 / Column 3 → 9 (Naked Single)
- Row 6 / Column 3 → 1 (Naked Single)
- Locked Candidates Type 1 (Pointing): 8 in b8 => r7c123<>8
- Naked Pair: 4,8 in r48c2 => r27c2<>4, r2c2<>8
- Locked Candidates Type 1 (Pointing): 4 in b1 => r1c56<>4
- Locked Candidates Type 1 (Pointing): 8 in b1 => r1c456<>8
- Locked Pair: 1,9 in r1c56 => r1c7,r2c56,r3c6<>1, r1c7,r3c6<>9
- Row 1 / Column 7 → 6 (Naked Single)
- Row 3 / Column 6 → 2 (Naked Single)
- Row 1 / Column 4 → 5 (Naked Single)
- Row 2 / Column 7 → 1 (Naked Single)
- Row 2 / Column 8 → 5 (Naked Single)
- Row 3 / Column 8 → 9 (Full House)
- Row 9 / Column 7 → 2 (Naked Single)
- Row 9 / Column 8 → 6 (Full House)
- Row 7 / Column 6 → 8 (Naked Single)
- Row 7 / Column 5 → 2 (Full House)
- Row 3 / Column 4 → 6 (Naked Single)
- Row 2 / Column 2 → 6 (Naked Single)
- Row 6 / Column 7 → 4 (Naked Single)
- Row 3 / Column 3 → 7 (Naked Single)
- Row 7 / Column 2 → 5 (Naked Single)
- Row 6 / Column 6 → 9 (Naked Single)
- Row 7 / Column 7 → 7 (Naked Single)
- Row 4 / Column 7 → 9 (Full House)
- Row 8 / Column 8 → 4 (Full House)
- Row 3 / Column 1 → 5 (Naked Single)
- Row 3 / Column 2 → 1 (Full House)
- Row 1 / Column 6 → 1 (Naked Single)
- Row 6 / Column 5 → 8 (Naked Single)
- Row 6 / Column 8 → 2 (Full House)
- Row 7 / Column 1 → 4 (Naked Single)
- Row 7 / Column 3 → 6 (Full House)
- Row 8 / Column 2 → 8 (Naked Single)
- Row 4 / Column 2 → 4 (Full House)
- Row 8 / Column 1 → 7 (Full House)
- Row 1 / Column 1 → 8 (Full House)
- Row 4 / Column 3 → 8 (Full House)
- Row 1 / Column 3 → 4 (Full House)
- Row 1 / Column 5 → 9 (Full House)
- Row 2 / Column 5 → 4 (Naked Single)
- Row 5 / Column 5 → 1 (Full House)
- Row 5 / Column 4 → 7 (Naked Single)
- Row 4 / Column 8 → 7 (Naked Single)
- Row 4 / Column 4 → 2 (Full House)
- Row 2 / Column 4 → 8 (Full House)
- Row 2 / Column 6 → 7 (Full House)
- Row 5 / Column 6 → 4 (Full House)
- Row 5 / Column 8 → 8 (Full House)
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