Solution for Hard Sudoku #1283425761998
8
6
9
7
4
5
3
1
2
2
3
5
8
9
1
4
6
7
1
4
7
2
3
6
5
9
8
9
5
4
2
3
1
6
7
8
3
1
6
7
8
9
5
2
4
7
8
2
6
5
4
3
1
9
4
2
3
5
9
7
1
8
6
1
7
8
6
4
3
9
5
2
9
6
5
8
2
1
4
7
3
This Sudoku Puzzle has 63 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined, Turbot Fish techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 1 / Column 4 → 2 (Naked Single)
- Row 2 / Column 4 → 8 (Naked Single)
- Row 3 / Column 4 → 4 (Naked Single)
- Row 6 / Column 4 → 5 (Naked Single)
- Row 7 / Column 4 → 1 (Full House)
- Row 4 / Column 5 → 1 (Hidden Single)
- Row 5 / Column 5 → 8 (Hidden Single)
- Row 6 / Column 3 → 8 (Hidden Single)
- Row 8 / Column 2 → 9 (Hidden Single)
- Row 3 / Column 9 → 8 (Hidden Single)
- Row 7 / Column 6 → 8 (Hidden Single)
- Row 3 / Column 7 → 5 (Hidden Single)
- Row 8 / Column 9 → 1 (Hidden Single)
- Row 9 / Column 1 → 1 (Hidden Single)
- Row 1 / Column 7 → 1 (Hidden Single)
- Row 3 / Column 2 → 1 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 7 in b1 => r78c1<>7
- Locked Candidates Type 1 (Pointing): 9 in b6 => r2c9<>9
- Locked Candidates Type 1 (Pointing): 2 in b7 => r7c5<>2
- Locked Candidates Type 2 (Claiming): 3 in c3 => r7c12,r8c1<>3
- 2-String Kite: 6 in r3c6,r6c1 (connected by r4c6,r6c5) => r3c1<>6
- Turbot Fish: 6 r1c2 =6= r2c1 -6- r6c1 =6= r6c5 => r1c5<>6
- XY-Wing: 3/6/7 in r1c29,r3c1 => r3c8<>7
- XY-Wing: 2/7/6 in r49c6,r9c3 => r4c3<>6
- Row 4 / Column 3 → 4 (Naked Single)
- Row 5 / Column 9 → 4 (Hidden Single)
- Row 5 / Column 8 → 5 (Hidden Single)
- Row 7 / Column 9 → 5 (Hidden Single)
- Row 9 / Column 5 → 5 (Hidden Single)
- Row 6 / Column 7 → 3 (Hidden Single)
- Row 8 / Column 1 → 5 (Hidden Single)
- Row 9 / Column 6 → 2 (Hidden Single)
- Row 4 / Column 6 → 6 (Naked Single)
- Row 6 / Column 5 → 2 (Full House)
- Row 6 / Column 9 → 9 (Naked Single)
- Row 6 / Column 1 → 6 (Full House)
- Row 8 / Column 5 → 4 (Hidden Single)
- Row 7 / Column 1 → 4 (Hidden Single)
- Row 4 / Column 1 → 9 (Hidden Single)
- Row 1 / Column 2 → 6 (Hidden Single)
- Row 1 / Column 9 → 7 (Naked Single)
- Row 1 / Column 5 → 3 (Full House)
- Row 7 / Column 2 → 2 (Naked Single)
- Row 5 / Column 2 → 3 (Full House)
- Row 5 / Column 1 → 2 (Full House)
- Row 2 / Column 7 → 2 (Naked Single)
- Row 4 / Column 7 → 7 (Full House)
- Row 4 / Column 9 → 2 (Full House)
- Row 2 / Column 9 → 6 (Full House)
- Row 3 / Column 6 → 7 (Naked Single)
- Row 8 / Column 6 → 3 (Full House)
- Row 7 / Column 5 → 7 (Full House)
- Row 8 / Column 3 → 7 (Full House)
- Row 2 / Column 5 → 9 (Naked Single)
- Row 3 / Column 5 → 6 (Full House)
- Row 3 / Column 1 → 3 (Naked Single)
- Row 2 / Column 1 → 7 (Full House)
- Row 2 / Column 8 → 3 (Full House)
- Row 3 / Column 8 → 9 (Full House)
- Row 7 / Column 8 → 6 (Naked Single)
- Row 7 / Column 3 → 3 (Full House)
- Row 9 / Column 3 → 6 (Full House)
- Row 9 / Column 8 → 7 (Full House)
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