Solution for Evil Sudoku #1226713524895
1
8
3
4
2
2
7
3
7
2
6
2
5
8
7
1
2
3
7
8
1
4
1
6
5
4
This Sudoku Puzzle has 64 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Hidden Pair, Naked Quadruple, Naked Single, Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Hidden Pair
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 5 / Column 1 → 1 (Hidden Single)
- Row 7 / Column 1 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 4 in b3 => r5c9<>4
- Locked Candidates Type 1 (Pointing): 5 in b7 => r9c5<>5
- Locked Candidates Type 1 (Pointing): 6 in b7 => r8c78<>6
- Locked Candidates Type 1 (Pointing): 8 in b8 => r9c79<>8
- Locked Candidates Type 2 (Claiming): 3 in c1 => r8c23,r9c2<>3
- Locked Candidates Type 2 (Claiming): 8 in c9 => r1c8<>8
- Hidden Pair: 4,8 in r13c9 => r13c9<>6, r13c9<>9, r3c9<>1
- Locked Candidates Type 1 (Pointing): 1 in b3 => r2c4<>1
- Naked Quadruple: 3,4,6,9 in r5c2357 => r5c89<>6, r5c89<>9
- Row 5 / Column 8 → 7 (Naked Single)
- Row 5 / Column 9 → 7 (Naked Single)
- Row 9 / Column 9 → 9 (Naked Single)
- Row 9 / Column 7 → 3 (Naked Single)
- Row 7 / Column 7 → 6 (Naked Single)
- Row 8 / Column 7 → 8 (Naked Single)
- Row 9 / Column 1 → 5 (Naked Single)
- Row 9 / Column 5 → 8 (Naked Single)
- Row 7 / Column 9 → 1 (Naked Single)
- Row 8 / Column 8 → 2 (Full House)
- Row 7 / Column 8 → 2 (Full House)
- Row 9 / Column 2 → 2 (Naked Single)
- Row 9 / Column 4 → 7 (Full House)
- Row 2 / Column 9 → 6 (Naked Single)
- Row 8 / Column 3 → 9 (Naked Single)
- Row 7 / Column 4 → 9 (Naked Single)
- Row 2 / Column 4 → 9 (Naked Single)
- Row 8 / Column 2 → 6 (Naked Single)
- Row 8 / Column 6 → 3 (Full House)
- Row 8 / Column 1 → 3 (Full House)
- Row 7 / Column 5 → 5 (Full House)
- Row 7 / Column 6 → 5 (Full House)
- Row 4 / Column 4 → 6 (Naked Single)
- Row 6 / Column 4 → 1 (Naked Single)
- Row 2 / Column 7 → 5 (Naked Single)
- Row 1 / Column 5 → 6 (Naked Single)
- Row 3 / Column 5 → 6 (Naked Single)
- Row 1 / Column 6 → 7 (Naked Single)
- Row 3 / Column 6 → 1 (Naked Single)
- Row 3 / Column 4 → 8 (Naked Single)
- Row 1 / Column 8 → 9 (Naked Single)
- Row 2 / Column 2 → 3 (Naked Single)
- Row 2 / Column 8 → 1 (Naked Single)
- Row 1 / Column 1 → 9 (Naked Single)
- Row 3 / Column 1 → 9 (Naked Single)
- Row 3 / Column 9 → 4 (Naked Single)
- Row 1 / Column 9 → 8 (Full House)
- Row 2 / Column 3 → 7 (Naked Single)
- Row 3 / Column 2 → 5 (Naked Single)
- Row 1 / Column 3 → 4 (Naked Single)
- Row 3 / Column 3 → 2 (Naked Single)
- Row 5 / Column 3 → 3 (Naked Single)
- Row 4 / Column 3 → 5 (Full House)
- Row 5 / Column 5 → 9 (Naked Single)
- Row 4 / Column 6 → 4 (Full House)
- Row 6 / Column 6 → 4 (Full House)
- Row 4 / Column 8 → 8 (Naked Single)
- Row 4 / Column 2 → 9 (Full House)
- Row 5 / Column 2 → 4 (Naked Single)
- Row 6 / Column 2 → 8 (Full House)
- Row 5 / Column 7 → 4 (Naked Single)
- Row 6 / Column 7 → 9 (Naked Single)
- Row 6 / Column 8 → 5 (Naked Single)
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