Solution for Evil Sudoku #1342713524895
7
1
8
4
7
2
8
1
4
1
2
5
7
2
8
3
4
2
4
5
1
3
4
7
4
3
This Sudoku Puzzle has 64 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Naked Single, Locked Pair, Locked Triple, Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 1 / Column 5 → 1 (Hidden Single)
- Row 3 / Column 7 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 8 in b4 => r79c1<>8
- Locked Candidates Type 2 (Claiming): 3 in r1 => r2c12,r3c2<>3
- Locked Candidates Type 2 (Claiming): 8 in r9 => r8c9<>8
- Naked Pair: 6,9 in r4c36 => r4c1478<>6, r4c1478<>9
- Row 4 / Column 4 → 1 (Naked Single)
- Row 4 / Column 7 → 8 (Naked Single)
- Row 4 / Column 8 → 7 (Naked Single)
- Row 4 / Column 1 → 7 (Naked Single)
- Row 6 / Column 7 → 1 (Hidden Single)
- Row 5 / Column 1 → 8 (Hidden Single)
- Row 9 / Column 9 → 8 (Hidden Single)
- Row 3 / Column 9 → 7 (Hidden Single)
- Row 8 / Column 2 → 7 (Hidden Single)
- Row 9 / Column 5 → 7 (Hidden Single)
- Row 7 / Column 2 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 5 in b4 => r1c3<>5
- Locked Candidates Type 1 (Pointing): 2 in b7 => r1c3<>2
- Naked Pair: 6,9 in r4c6,r6c4 => r5c5,r6c6<>6, r5c5,r6c6<>9
- Row 5 / Column 5 → 3 (Naked Single)
- Row 6 / Column 6 → 3 (Naked Single)
- Row 2 / Column 8 → 3 (Hidden Single)
- Row 1 / Column 2 → 3 (Hidden Single)
- Row 7 / Column 1 → 3 (Hidden Single)
- Row 2 / Column 2 → 2 (Hidden Single)
- Locked Pair: 6,9 in r23c5 => r2c46,r3c6,r78c5<>6, r2c46,r3c6,r78c5<>9
- Row 7 / Column 5 → 2 (Naked Single)
- Row 8 / Column 5 → 2 (Naked Single)
- Row 3 / Column 6 → 5 (Naked Single)
- Row 2 / Column 4 → 8 (Naked Single)
- Row 2 / Column 6 → 8 (Naked Single)
- Row 9 / Column 3 → 2 (Hidden Single)
- Row 1 / Column 9 → 2 (Hidden Single)
- Row 9 / Column 8 → 1 (Hidden Single)
- Row 8 / Column 3 → 1 (Hidden Single)
- Locked Triple: 5,6,9 in r456c3 => r17c3,r6c2<>6, r17c3,r6c2<>9
- Row 1 / Column 3 → 9 (Naked Single)
- Row 7 / Column 3 → 9 (Naked Single)
- Row 6 / Column 2 → 9 (Naked Single)
- Row 3 / Column 2 → 6 (Naked Single)
- Row 3 / Column 5 → 9 (Full House)
- Row 3 / Column 8 → 9 (Full House)
- Row 4 / Column 3 → 6 (Naked Single)
- Row 9 / Column 1 → 6 (Naked Single)
- Row 9 / Column 7 → 9 (Full House)
- Row 6 / Column 4 → 6 (Naked Single)
- Row 1 / Column 1 → 5 (Naked Single)
- Row 2 / Column 1 → 5 (Naked Single)
- Row 2 / Column 5 → 6 (Naked Single)
- Row 4 / Column 6 → 9 (Naked Single)
- Row 5 / Column 3 → 5 (Naked Single)
- Row 1 / Column 7 → 6 (Full House)
- Row 2 / Column 7 → 6 (Full House)
- Row 5 / Column 7 → 6 (Full House)
- Row 6 / Column 3 → 5 (Naked Single)
- Row 6 / Column 9 → 5 (Naked Single)
- Row 7 / Column 4 → 5 (Naked Single)
- Row 8 / Column 4 → 9 (Full House)
- Row 8 / Column 6 → 6 (Naked Single)
- Row 5 / Column 9 → 9 (Naked Single)
- Row 8 / Column 9 → 6 (Naked Single)
- Row 7 / Column 8 → 6 (Naked Single)
- Row 8 / Column 8 → 5 (Naked Single)
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