8
1
2
9
4
3
6
7
5
7
5
3
6
8
2
4
9
1
6
4
9
1
7
5
2
8
3
1
5
4
3
6
9
2
8
7
2
3
7
8
4
5
1
6
9
8
9
6
7
2
1
5
3
4
5
2
1
4
3
8
7
9
6
9
7
4
5
2
6
3
1
8
3
6
8
9
1
7
4
5
2
This Sudoku Puzzle has 72 steps and it is solved using Brute Force, Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Hidden Pair, Hidden Triple, Empty Rectangle, Locked Candidates Type 2 (Claiming), Naked Pair, AIC, 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 3 → 9 (Brute Force)
- Row 2 / Column 1 → 9 (Hidden Single)
- Row 5 / Column 4 → 8 (Brute Force)
- Row 5 / Column 8 → 2 (Naked Single)
- Row 6 / Column 2 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 3 in b5 => r4c1<>3
- Hidden Pair: 1,8 in r9c56 => r9c56<>2, r9c56<>3, r9c56<>6, r9c5<>7
- Locked Candidates Type 1 (Pointing): 6 in b8 => r8c12<>6
- Hidden Triple: 1,5,8 in r129c5 => r12c5<>2, r1c5<>3, r12c5<>7
- Row 1 / Column 4 → 7 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 2 in b2 => r678c6<>2
- Empty Rectangle: 6 in b3 (r15c2) => r5c9<>6
- Row 5 / Column 9 → 1 (Naked Single)
- Row 4 / Column 1 → 1 (Hidden Single)
- Row 3 / Column 6 → 1 (Hidden Single)
- Row 1 / Column 5 → 5 (Naked Single)
- Row 9 / Column 6 → 8 (Naked Single)
- Row 2 / Column 5 → 8 (Naked Single)
- Row 9 / Column 5 → 1 (Naked Single)
- Row 3 / Column 8 → 8 (Hidden Single)
- Row 4 / Column 7 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 5 in b1 => r3c9<>5
- Locked Candidates Type 2 (Claiming): 6 in r5 => r46c3,r6c1<>6
- Naked Pair: 4,9 in r14c8 => r2c8<>4
- AIC: 3/6 6- r1c7 =6= r6c7 -6- r4c9 =6= r4c5 =3= r4c4 -3- r3c4 =3= r3c9 -3 => r1c7<>3, r3c9<>6
- Locked Candidates Type 1 (Pointing): 3 in b3 => r89c9<>3
- Locked Candidates Type 1 (Pointing): 6 in b3 => r1c23<>6
- Row 5 / Column 2 → 6 (Hidden Single)
- Row 5 / Column 1 → 3 (Full House)
- Row 9 / Column 4 → 3 (Hidden Single)
- Row 3 / Column 4 → 4 (Naked Single)
- Row 2 / Column 6 → 2 (Naked Single)
- Row 1 / Column 6 → 3 (Full House)
- Row 3 / Column 9 → 3 (Naked Single)
- Row 4 / Column 5 → 3 (Hidden Single)
- Row 4 / Column 9 → 6 (Hidden Single)
- Row 1 / Column 7 → 6 (Hidden Single)
- Row 1 / Column 2 → 1 (Hidden Single)
- Row 2 / Column 2 → 4 (Naked Single)
- Row 1 / Column 3 → 2 (Naked Single)
- Row 4 / Column 3 → 4 (Naked Single)
- Row 4 / Column 8 → 9 (Naked Single)
- Row 4 / Column 4 → 2 (Full House)
- Row 7 / Column 4 → 9 (Full House)
- Row 6 / Column 3 → 7 (Naked Single)
- Row 6 / Column 1 → 2 (Full House)
- Row 1 / Column 8 → 4 (Naked Single)
- Row 1 / Column 9 → 9 (Full House)
- Row 6 / Column 7 → 5 (Naked Single)
- Row 6 / Column 9 → 4 (Full House)
- Row 6 / Column 5 → 6 (Naked Single)
- Row 6 / Column 6 → 9 (Full House)
- Row 7 / Column 6 → 4 (Naked Single)
- Row 8 / Column 6 → 6 (Full House)
- Row 2 / Column 7 → 1 (Naked Single)
- Row 7 / Column 7 → 3 (Naked Single)
- Row 8 / Column 7 → 9 (Full House)
- Row 7 / Column 2 → 2 (Naked Single)
- Row 8 / Column 2 → 3 (Full House)
- Row 7 / Column 5 → 7 (Naked Single)
- Row 7 / Column 1 → 5 (Full House)
- Row 8 / Column 5 → 2 (Full House)
- Row 3 / Column 1 → 6 (Naked Single)
- Row 3 / Column 3 → 5 (Full House)
- Row 9 / Column 3 → 6 (Full House)
- Row 8 / Column 9 → 7 (Naked Single)
- Row 8 / Column 1 → 4 (Full House)
- Row 9 / Column 1 → 7 (Full House)
- Row 2 / Column 9 → 5 (Naked Single)
- Row 2 / Column 8 → 7 (Full House)
- Row 9 / Column 8 → 5 (Full House)
- Row 9 / Column 9 → 2 (Full House)
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