5
6
9
2
4
7
1
3
8
1
7
3
5
8
6
4
9
2
8
4
2
3
9
1
5
7
6
8
5
6
4
2
3
9
7
1
3
1
4
9
6
7
8
2
5
9
2
7
1
8
5
4
6
3
7
8
4
3
9
2
6
1
5
6
3
1
7
5
8
2
4
9
2
5
9
6
1
4
7
3
8
This Sudoku Puzzle has 67 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Full House, Locked Candidates Type 2 (Claiming), undefined techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 3 / Column 2 → 3 (Hidden Single)
- Row 1 / Column 8 → 4 (Hidden Single)
- Row 8 / Column 6 → 8 (Hidden Single)
- Row 9 / Column 7 → 7 (Hidden Single)
- Row 7 / Column 5 → 3 (Hidden Single)
- Row 8 / Column 5 → 5 (Naked Single)
- Row 9 / Column 5 → 4 (Naked Single)
- Row 3 / Column 3 → 8 (Hidden Single)
- Row 4 / Column 4 → 3 (Hidden Single)
- Row 7 / Column 2 → 8 (Hidden Single)
- Row 4 / Column 1 → 8 (Hidden Single)
- Row 6 / Column 4 → 8 (Hidden Single)
- Row 7 / Column 3 → 4 (Hidden Single)
- Row 5 / Column 1 → 4 (Hidden Single)
- Row 6 / Column 6 → 5 (Hidden Single)
- Row 2 / Column 2 → 4 (Hidden Single)
- Row 4 / Column 6 → 4 (Hidden Single)
- Row 3 / Column 4 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 1 in b3 => r45c9<>1
- Locked Candidates Type 1 (Pointing): 6 in b3 => r45c9<>6
- Locked Candidates Type 1 (Pointing): 9 in b5 => r5c279<>9
- Locked Candidates Type 1 (Pointing): 9 in b6 => r4c3<>9
- Locked Candidates Type 1 (Pointing): 2 in b8 => r9c238<>2
- Locked Candidates Type 1 (Pointing): 2 in b7 => r8c8<>2
- Row 4 / Column 8 → 2 (Hidden Single)
- Row 8 / Column 3 → 2 (Hidden Single)
- Row 5 / Column 2 → 2 (Hidden Single)
- Row 6 / Column 8 → 6 (Hidden Single)
- Row 6 / Column 1 → 9 (Naked Single)
- Row 8 / Column 1 → 3 (Naked Single)
- Row 8 / Column 8 → 1 (Naked Single)
- Row 8 / Column 2 → 9 (Full House)
- Row 9 / Column 8 → 3 (Full House)
- Row 4 / Column 3 → 6 (Hidden Single)
- Row 1 / Column 3 → 9 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 6 in b1 => r1c59<>6
- Row 5 / Column 5 → 6 (Hidden Single)
- Locked Candidates Type 2 (Claiming): 5 in r3 => r12c9<>5
- XY-Wing: 1/5/7 in r1c5,r2c34 => r1c2,r2c6<>7
- Row 1 / Column 2 → 6 (Naked Single)
- Row 2 / Column 6 → 6 (Naked Single)
- Row 1 / Column 1 → 5 (Naked Single)
- Row 2 / Column 3 → 7 (Full House)
- Row 9 / Column 1 → 6 (Full House)
- Row 9 / Column 2 → 1 (Naked Single)
- Row 6 / Column 2 → 7 (Full House)
- Row 6 / Column 3 → 1 (Full House)
- Row 9 / Column 3 → 5 (Full House)
- Row 2 / Column 9 → 1 (Naked Single)
- Row 2 / Column 4 → 5 (Full House)
- Row 3 / Column 6 → 2 (Naked Single)
- Row 1 / Column 9 → 2 (Naked Single)
- Row 1 / Column 4 → 1 (Naked Single)
- Row 1 / Column 5 → 7 (Full House)
- Row 4 / Column 5 → 1 (Full House)
- Row 3 / Column 7 → 5 (Naked Single)
- Row 3 / Column 9 → 6 (Full House)
- Row 9 / Column 6 → 9 (Naked Single)
- Row 5 / Column 6 → 7 (Full House)
- Row 5 / Column 4 → 9 (Full House)
- Row 9 / Column 4 → 2 (Full House)
- Row 7 / Column 9 → 9 (Naked Single)
- Row 7 / Column 7 → 2 (Full House)
- Row 4 / Column 7 → 9 (Naked Single)
- Row 5 / Column 7 → 1 (Full House)
- Row 5 / Column 9 → 5 (Full House)
- Row 4 / Column 9 → 7 (Full House)
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