8
2
4
7
4
3
3
9
5
9
8
3
8
5
6
2
7
5
4
2
7
6
This Sudoku Puzzle has 68 steps and it is solved using Hidden Single, Locked Pair, Naked Single, Locked Triple, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Uniqueness Test 2, Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 4 / Column 8 → 8 (Hidden Single)
- Row 4 / Column 5 → 7 (Hidden Single)
- Row 2 / Column 2 → 5 (Hidden Single)
- Row 2 / Column 1 → 3 (Hidden Single)
- Row 4 / Column 2 → 3 (Hidden Single)
- Row 2 / Column 9 → 7 (Hidden Single)
- Row 2 / Column 4 → 8 (Hidden Single)
- Locked Pair: 1,9 in r8c46 => r789c5,r8c278,r9c46<>1, r789c5,r8c8,r9c46<>9
- Row 8 / Column 8 → 2 (Naked Single)
- Row 8 / Column 2 → 7 (Naked Single)
- Row 6 / Column 1 → 7 (Hidden Single)
- Row 9 / Column 7 → 7 (Hidden Single)
- Row 3 / Column 3 → 7 (Hidden Single)
- Locked Triple: 3,6,8 in r789c5 => r135c5,r9c46<>6
- Locked Candidates Type 1 (Pointing): 6 in b5 => r6c2<>6
- Locked Candidates Type 1 (Pointing): 9 in b6 => r6c46<>9
- Locked Candidates Type 1 (Pointing): 4 in b8 => r9c89<>4
- Locked Candidates Type 1 (Pointing): 5 in b8 => r9c89<>5
- Locked Candidates Type 2 (Claiming): 6 in c2 => r7c13,r9c13<>6
- Locked Candidates Type 2 (Claiming): 9 in c5 => r1c6,r3c4<>9
- Uniqueness Test 2: 1/9 in r4c46,r8c46 => r4c1,r6c46<>4
- Row 4 / Column 1 → 1 (Naked Single)
- Row 5 / Column 3 → 6 (Naked Single)
- Row 6 / Column 2 → 2 (Naked Single)
- Row 5 / Column 1 → 4 (Full House)
- Row 1 / Column 3 → 1 (Hidden Single)
- Row 5 / Column 5 → 2 (Hidden Single)
- Row 1 / Column 5 → 9 (Naked Single)
- Row 1 / Column 1 → 6 (Naked Single)
- Row 3 / Column 1 → 9 (Full House)
- Row 3 / Column 5 → 1 (Naked Single)
- Row 7 / Column 1 → 8 (Naked Single)
- Row 9 / Column 1 → 2 (Full House)
- Row 2 / Column 6 → 6 (Naked Single)
- Row 2 / Column 8 → 1 (Full House)
- Row 3 / Column 4 → 5 (Naked Single)
- Row 1 / Column 6 → 2 (Full House)
- Row 6 / Column 6 → 1 (Naked Single)
- Row 9 / Column 8 → 9 (Naked Single)
- Row 3 / Column 8 → 6 (Naked Single)
- Row 3 / Column 9 → 8 (Naked Single)
- Row 3 / Column 7 → 2 (Full House)
- Row 9 / Column 4 → 4 (Naked Single)
- Row 6 / Column 4 → 6 (Naked Single)
- Row 8 / Column 6 → 9 (Naked Single)
- Row 6 / Column 8 → 4 (Naked Single)
- Row 7 / Column 8 → 5 (Full House)
- Row 9 / Column 3 → 3 (Naked Single)
- Row 7 / Column 3 → 9 (Full House)
- Row 4 / Column 4 → 9 (Naked Single)
- Row 4 / Column 6 → 4 (Full House)
- Row 9 / Column 6 → 5 (Full House)
- Row 8 / Column 4 → 1 (Full House)
- Row 6 / Column 7 → 3 (Naked Single)
- Row 6 / Column 9 → 9 (Full House)
- Row 9 / Column 9 → 1 (Naked Single)
- Row 8 / Column 7 → 8 (Naked Single)
- Row 8 / Column 5 → 3 (Full House)
- Row 5 / Column 9 → 5 (Naked Single)
- Row 5 / Column 7 → 1 (Full House)
- Row 7 / Column 7 → 4 (Naked Single)
- Row 1 / Column 7 → 5 (Full House)
- Row 1 / Column 9 → 4 (Full House)
- Row 7 / Column 9 → 3 (Full House)
- Row 9 / Column 2 → 6 (Naked Single)
- Row 7 / Column 2 → 1 (Full House)
- Row 7 / Column 5 → 6 (Full House)
- Row 9 / Column 5 → 8 (Full House)
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