Solution for Evil Sudoku #1437214598692
4
5
2
1
6
3
8
7
9
3
9
6
8
5
7
4
2
1
1
8
7
2
4
9
5
3
6
3
2
6
5
4
8
7
9
1
1
4
8
6
7
9
5
3
2
7
9
5
3
1
2
4
6
8
6
1
4
2
3
7
9
8
5
2
8
5
9
6
4
7
1
3
9
7
3
8
5
1
6
2
4
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 2 / Column 4 → 8 (Hidden Single)
- Row 9 / Column 2 → 8 (Hidden Single)
- Row 4 / Column 1 → 3 (Hidden Single)
- Row 5 / Column 7 → 3 (Hidden Single)
- Row 6 / Column 1 → 7 (Hidden Single)
- Locked Pair: 4,6 in r6c78 => r4c79,r6c269<>4, r4c79,r6c239<>6
- Row 6 / Column 9 → 8 (Naked Single)
- Row 4 / Column 6 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 3 in b2 => r789c4<>3
- Locked Candidates Type 1 (Pointing): 4 in b4 => r12c2<>4
- Locked Candidates Type 1 (Pointing): 1 in b5 => r4c23<>1
- Locked Candidates Type 1 (Pointing): 7 in b6 => r4c45<>7
- Locked Candidates Type 1 (Pointing): 9 in b9 => r7c46<>9
- Locked Candidates Type 2 (Claiming): 1 in c1 => r1c23,r2c2<>1
- Locked Pair: 2,5 in r1c23 => r1c47,r2c2,r3c3<>2, r1c79,r3c3<>5
- Row 2 / Column 7 → 2 (Hidden Single)
- Row 2 / Column 1 → 1 (Hidden Single)
- Row 1 / Column 1 → 4 (Full House)
- Row 1 / Column 4 → 3 (Naked Single)
- Row 1 / Column 9 → 7 (Naked Single)
- Row 1 / Column 7 → 1 (Naked Single)
- Row 4 / Column 9 → 5 (Naked Single)
- Row 4 / Column 7 → 7 (Naked Single)
- Locked Candidates Type 1 (Pointing): 4 in b2 => r3c789<>4
- Naked Pair: 4,6 in r26c8 => r38c8<>6, r8c8<>4
- Locked Candidates Type 1 (Pointing): 4 in b9 => r9c456<>4
- Locked Candidates Type 1 (Pointing): 6 in b9 => r9c45<>6
- Locked Pair: 1,7 in r9c45 => r7c4,r9c3<>1, r78c4,r8c5,r9c3<>7
- Row 9 / Column 3 → 5 (Naked Single)
- Row 7 / Column 4 → 2 (Naked Single)
- Row 1 / Column 3 → 2 (Naked Single)
- Row 1 / Column 2 → 5 (Full House)
- Row 8 / Column 2 → 3 (Naked Single)
- Row 8 / Column 3 → 7 (Naked Single)
- Row 7 / Column 2 → 1 (Full House)
- Row 9 / Column 6 → 3 (Naked Single)
- Row 3 / Column 4 → 4 (Naked Single)
- Row 3 / Column 5 → 2 (Full House)
- Row 4 / Column 3 → 6 (Naked Single)
- Row 8 / Column 8 → 5 (Naked Single)
- Row 7 / Column 6 → 5 (Naked Single)
- Row 3 / Column 3 → 9 (Naked Single)
- Row 2 / Column 2 → 6 (Full House)
- Row 6 / Column 3 → 1 (Full House)
- Row 4 / Column 4 → 1 (Naked Single)
- Row 3 / Column 8 → 3 (Naked Single)
- Row 7 / Column 7 → 9 (Naked Single)
- Row 2 / Column 8 → 4 (Naked Single)
- Row 2 / Column 9 → 9 (Full House)
- Row 4 / Column 5 → 4 (Naked Single)
- Row 4 / Column 2 → 2 (Full House)
- Row 9 / Column 4 → 7 (Naked Single)
- Row 3 / Column 9 → 6 (Naked Single)
- Row 3 / Column 7 → 5 (Full House)
- Row 7 / Column 8 → 7 (Naked Single)
- Row 7 / Column 9 → 3 (Full House)
- Row 6 / Column 8 → 6 (Full House)
- Row 9 / Column 9 → 4 (Full House)
- Row 6 / Column 7 → 4 (Full House)
- Row 9 / Column 7 → 6 (Full House)
- Row 9 / Column 5 → 1 (Full House)
- Row 5 / Column 6 → 9 (Naked Single)
- Row 8 / Column 5 → 6 (Naked Single)
- Row 5 / Column 5 → 7 (Full House)
- Row 6 / Column 2 → 9 (Naked Single)
- Row 5 / Column 2 → 4 (Full House)
- Row 5 / Column 4 → 6 (Full House)
- Row 6 / Column 6 → 2 (Full House)
- Row 8 / Column 6 → 4 (Full House)
- Row 8 / Column 4 → 9 (Full House)
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