Solution for Evil Sudoku #1186713524895
3
8
7
8
3
1
5
4
2
4
3
8
2
7
5
6
1
4
1
8
6
7
8
8
1
7
This Sudoku Puzzle has 66 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Hidden Rectangle, undefined, Naked Single, Naked Pair, Discontinuous Nice Loop, Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 2 / Column 8 → 8 (Hidden Single)
- Row 9 / Column 5 → 1 (Hidden Single)
- Row 9 / Column 7 → 4 (Hidden Single)
- Row 2 / Column 5 → 7 (Hidden Single)
- Row 4 / Column 8 → 7 (Hidden Single)
- Row 1 / Column 9 → 7 (Hidden Single)
- Row 7 / Column 1 → 7 (Hidden Single)
- Row 6 / Column 2 → 7 (Hidden Single)
- Row 1 / Column 1 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 1 in b4 => r1c3<>1
- Locked Candidates Type 1 (Pointing): 5 in b9 => r5c9<>5
- Locked Candidates Type 1 (Pointing): 6 in b9 => r3c8<>6
- Locked Candidates Type 2 (Claiming): 3 in r9 => r78c8,r8c9<>3
- Hidden Rectangle: 1/9 in r4c36,r6c36 => r4c3<>9
- Almost Locked Set XZ-Rule: A=r8c23456 {234569}, B=r78c8 {269}, X=6, Z=2,9 => r8c9<>2, r8c9<>9
- Row 8 / Column 9 → 5 (Naked Single)
- Row 7 / Column 4 → 5 (Hidden Single)
- Locked Candidates Type 2 (Claiming): 5 in c2 => r2c1<>5
- Naked Pair: 6,9 in r26c4 => r48c4<>9
- Discontinuous Nice Loop: 9 r3c5 -9- r2c4 -6- r6c4 =6= r5c5 =3= r4c4 =4= r4c6 -4- r3c6 =4= r3c5 => r3c5<>9
- Almost Locked Set XZ-Rule: A=r8c2356 {23469}, B=r8c4 {34}, X=3,4 => r8c8<>2, r8c8,r9c13<>6, r8c8<>9
- Row 8 / Column 8 → 9 (Naked Single)
- Row 7 / Column 8 → 2 (Naked Single)
- Row 3 / Column 8 → 3 (Naked Single)
- Row 9 / Column 9 → 3 (Naked Single)
- Row 9 / Column 8 → 6 (Naked Single)
- Row 7 / Column 5 → 9 (Hidden Single)
- Row 7 / Column 2 → 3 (Naked Single)
- Row 7 / Column 3 → 4 (Full House)
- Row 8 / Column 2 → 6 (Naked Single)
- Row 8 / Column 3 → 2 (Naked Single)
- Row 8 / Column 6 → 4 (Naked Single)
- Row 8 / Column 4 → 3 (Full House)
- Row 8 / Column 5 → 3 (Full House)
- Row 4 / Column 4 → 4 (Naked Single)
- Row 5 / Column 5 → 6 (Naked Single)
- Row 1 / Column 5 → 2 (Naked Single)
- Row 6 / Column 4 → 9 (Naked Single)
- Row 2 / Column 4 → 6 (Full House)
- Row 4 / Column 6 → 1 (Full House)
- Row 6 / Column 6 → 1 (Full House)
- Row 3 / Column 5 → 4 (Naked Single)
- Row 6 / Column 7 → 2 (Naked Single)
- Row 4 / Column 3 → 5 (Naked Single)
- Row 6 / Column 9 → 8 (Naked Single)
- Row 4 / Column 1 → 9 (Naked Single)
- Row 4 / Column 7 → 3 (Full House)
- Row 5 / Column 1 → 9 (Naked Single)
- Row 9 / Column 3 → 9 (Naked Single)
- Row 9 / Column 1 → 5 (Full House)
- Row 5 / Column 9 → 9 (Naked Single)
- Row 6 / Column 3 → 6 (Naked Single)
- Row 2 / Column 1 → 2 (Naked Single)
- Row 5 / Column 3 → 8 (Naked Single)
- Row 1 / Column 3 → 6 (Full House)
- Row 5 / Column 7 → 5 (Naked Single)
- Row 3 / Column 9 → 2 (Naked Single)
- Row 3 / Column 7 → 6 (Hidden Single)
- Locked Candidates Type 2 (Claiming): 9 in r5 => r123c2<>9
- Row 1 / Column 2 → 1 (Naked Single)
- Row 3 / Column 2 → 5 (Full House)
- Row 2 / Column 2 → 5 (Full House)
- Row 3 / Column 6 → 9 (Full House)
- Row 2 / Column 6 → 9 (Full House)
- Row 1 / Column 7 → 9 (Naked Single)
- Row 2 / Column 7 → 1 (Full House)
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