Solution for Medium Sudoku #21173249586101
2
7
8
3
5
9
4
1
6
5
3
6
8
1
4
2
9
7
1
9
4
7
6
2
3
5
8
6
2
1
5
3
7
9
8
4
9
4
3
6
8
2
7
5
1
8
7
5
9
4
1
6
2
3
1
6
3
7
9
5
8
4
2
4
7
5
3
2
8
1
6
9
2
8
9
4
1
6
5
3
7
This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Naked Pair, Locked Candidates Type 2 (Claiming), Naked Triple techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 3 / Column 4 → 2 (Hidden Single)
- Row 2 / Column 1 → 3 (Hidden Single)
- Row 3 / Column 2 → 1 (Hidden Single)
- Row 1 / Column 7 → 1 (Hidden Single)
- Row 8 / Column 4 → 3 (Hidden Single)
- Row 9 / Column 8 → 3 (Hidden Single)
- Row 1 / Column 8 → 9 (Hidden Single)
- Row 7 / Column 8 → 8 (Hidden Single)
- Row 7 / Column 1 → 1 (Naked Single)
- Row 3 / Column 9 → 8 (Hidden Single)
- Row 4 / Column 3 → 1 (Hidden Single)
- Row 9 / Column 3 → 2 (Hidden Single)
- Row 8 / Column 3 → 5 (Hidden Single)
- Row 8 / Column 9 → 6 (Naked Single)
- Row 9 / Column 7 → 5 (Full House)
- Locked Candidates Type 1 (Pointing): 7 in b1 => r1c46<>7
- Locked Candidates Type 1 (Pointing): 7 in b2 => r46c6<>7
- Locked Candidates Type 1 (Pointing): 6 in b3 => r2c6<>6
- Locked Candidates Type 1 (Pointing): 9 in b8 => r9c12<>9
- Row 9 / Column 1 → 8 (Naked Single)
- Naked Pair: 4,5 in r1c49 => r1c56<>4, r1c56<>5
- Locked Candidates Type 2 (Claiming): 5 in c5 => r4c46,r6c46<>5
- Naked Pair: 4,6 in r9c25 => r9c46<>4, r9c6<>6
- Naked Pair: 4,5 in r17c4 => r4c4<>4
- Naked Pair: 1,9 in r69c6 => r4c6<>9
- Naked Triple: 1,7,9 in r6c146 => r6c278<>7, r6c27<>9
- Row 6 / Column 7 → 6 (Naked Single)
- Row 2 / Column 7 → 7 (Naked Single)
- Row 5 / Column 7 → 9 (Full House)
- Row 2 / Column 6 → 4 (Naked Single)
- Row 3 / Column 8 → 5 (Naked Single)
- Row 3 / Column 6 → 7 (Full House)
- Row 1 / Column 4 → 5 (Naked Single)
- Row 2 / Column 9 → 2 (Naked Single)
- Row 2 / Column 8 → 6 (Full House)
- Row 1 / Column 9 → 4 (Full House)
- Row 4 / Column 9 → 5 (Full House)
- Row 4 / Column 6 → 3 (Naked Single)
- Row 6 / Column 8 → 2 (Naked Single)
- Row 7 / Column 4 → 4 (Naked Single)
- Row 1 / Column 6 → 6 (Naked Single)
- Row 1 / Column 5 → 3 (Full House)
- Row 4 / Column 5 → 4 (Naked Single)
- Row 6 / Column 2 → 8 (Naked Single)
- Row 7 / Column 2 → 6 (Naked Single)
- Row 7 / Column 6 → 5 (Full House)
- Row 9 / Column 5 → 6 (Naked Single)
- Row 4 / Column 8 → 7 (Naked Single)
- Row 5 / Column 8 → 4 (Full House)
- Row 5 / Column 5 → 8 (Naked Single)
- Row 6 / Column 5 → 5 (Full House)
- Row 1 / Column 2 → 7 (Naked Single)
- Row 1 / Column 3 → 8 (Full House)
- Row 5 / Column 3 → 7 (Full House)
- Row 5 / Column 2 → 3 (Full House)
- Row 9 / Column 2 → 4 (Naked Single)
- Row 4 / Column 4 → 9 (Naked Single)
- Row 4 / Column 2 → 2 (Full House)
- Row 8 / Column 2 → 9 (Full House)
- Row 6 / Column 1 → 9 (Full House)
- Row 8 / Column 1 → 7 (Full House)
- Row 6 / Column 6 → 1 (Naked Single)
- Row 6 / Column 4 → 7 (Full House)
- Row 9 / Column 4 → 1 (Full House)
- Row 9 / Column 6 → 9 (Full House)
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