Solution for Evil Sudoku #2372384956192
4
8
7
3
9
2
1
6
5
6
3
9
1
8
5
4
7
2
1
5
2
7
4
6
9
3
8
7
4
9
8
1
6
2
5
3
3
5
6
7
2
4
9
1
8
8
2
1
3
9
5
4
6
7
9
2
4
6
7
8
5
3
1
8
6
1
5
4
3
2
9
7
5
7
3
2
1
9
6
8
4
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 8 / Column 1 → 6 (Hidden Single)
- Row 9 / Column 6 → 7 (Hidden Single)
- Row 6 / Column 8 → 6 (Hidden Single)
- Row 3 / Column 5 → 7 (Hidden Single)
- Row 9 / Column 4 → 2 (Hidden Single)
- Locked Pair: 1,4 in r23c4 => r1c46,r3c6,r78c4<>1, r1c46,r3c6,r48c4<>4
- Row 1 / Column 4 → 6 (Naked Single)
- Row 4 / Column 6 → 6 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 5 in b1 => r46c3<>5
- Locked Candidates Type 1 (Pointing): 2 in b2 => r56c6<>2
- Locked Candidates Type 1 (Pointing): 8 in b5 => r78c6<>8
- Locked Candidates Type 1 (Pointing): 7 in b6 => r6c123<>7
- Locked Candidates Type 1 (Pointing): 4 in b8 => r8c89<>4
- Locked Candidates Type 2 (Claiming): 2 in r2 => r1c13,r3c13<>2
- Locked Candidates Type 2 (Claiming): 8 in r9 => r78c9,r8c8<>8
- Locked Pair: 3,9 in r78c9 => r13c9,r7c7<>9, r36c9,r7c7,r8c8<>3
- Row 3 / Column 8 → 3 (Hidden Single)
- Row 3 / Column 9 → 8 (Hidden Single)
- Row 9 / Column 9 → 4 (Naked Single)
- Row 9 / Column 8 → 8 (Full House)
- Row 6 / Column 9 → 7 (Naked Single)
- Row 1 / Column 9 → 2 (Naked Single)
- Row 1 / Column 6 → 9 (Naked Single)
- Row 3 / Column 6 → 2 (Naked Single)
- Locked Candidates Type 1 (Pointing): 4 in b6 => r123c7<>4
- Naked Pair: 1,4 in r2c48 => r2c27<>1, r2c2<>4
- Locked Candidates Type 1 (Pointing): 1 in b1 => r56c1<>1
- Locked Candidates Type 1 (Pointing): 4 in b1 => r456c1<>4
- Locked Pair: 2,8 in r56c1 => r56c2,r6c3,r7c1<>2, r6c3,r7c1<>8
- Row 7 / Column 1 → 9 (Naked Single)
- Row 6 / Column 3 → 3 (Naked Single)
- Row 4 / Column 1 → 7 (Naked Single)
- Row 7 / Column 2 → 2 (Naked Single)
- Row 7 / Column 9 → 3 (Naked Single)
- Row 8 / Column 9 → 9 (Full House)
- Row 8 / Column 2 → 7 (Naked Single)
- Row 8 / Column 3 → 8 (Full House)
- Row 6 / Column 7 → 4 (Naked Single)
- Row 5 / Column 7 → 3 (Full House)
- Row 4 / Column 3 → 9 (Naked Single)
- Row 7 / Column 6 → 1 (Naked Single)
- Row 2 / Column 2 → 9 (Naked Single)
- Row 3 / Column 3 → 5 (Naked Single)
- Row 6 / Column 6 → 8 (Naked Single)
- Row 7 / Column 7 → 5 (Naked Single)
- Row 7 / Column 4 → 8 (Full House)
- Row 8 / Column 8 → 1 (Full House)
- Row 2 / Column 7 → 7 (Naked Single)
- Row 1 / Column 3 → 7 (Naked Single)
- Row 2 / Column 3 → 2 (Full House)
- Row 5 / Column 6 → 4 (Naked Single)
- Row 8 / Column 6 → 3 (Full House)
- Row 6 / Column 1 → 2 (Naked Single)
- Row 2 / Column 8 → 4 (Naked Single)
- Row 1 / Column 8 → 5 (Full House)
- Row 2 / Column 4 → 1 (Full House)
- Row 3 / Column 4 → 4 (Full House)
- Row 1 / Column 7 → 1 (Naked Single)
- Row 1 / Column 1 → 4 (Full House)
- Row 3 / Column 1 → 1 (Full House)
- Row 5 / Column 1 → 8 (Full House)
- Row 3 / Column 7 → 9 (Full House)
- Row 4 / Column 5 → 5 (Naked Single)
- Row 5 / Column 2 → 1 (Naked Single)
- Row 5 / Column 5 → 2 (Full House)
- Row 8 / Column 4 → 5 (Naked Single)
- Row 4 / Column 4 → 3 (Full House)
- Row 4 / Column 2 → 4 (Full House)
- Row 6 / Column 5 → 1 (Full House)
- Row 8 / Column 5 → 4 (Full House)
- Row 6 / Column 2 → 5 (Full House)
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