Solution for Hard Sudoku #4495247836198
9
3
1
8
2
7
5
6
4
4
5
7
9
1
6
2
3
8
6
2
8
4
5
3
7
1
9
1
7
2
4
5
6
3
8
9
5
6
3
8
9
1
7
4
2
8
9
4
3
7
2
5
6
1
2
4
5
7
1
8
6
9
3
6
8
9
3
2
5
1
7
4
1
3
7
9
4
6
2
8
5
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 → 4 (Naked Single)
- Row 2 / Column 4 → 9 (Naked Single)
- Row 3 / Column 4 → 2 (Naked Single)
- Row 6 / Column 4 → 7 (Naked Single)
- Row 7 / Column 4 → 6 (Full House)
- Row 4 / Column 5 → 6 (Hidden Single)
- Row 5 / Column 5 → 9 (Hidden Single)
- Row 6 / Column 3 → 9 (Hidden Single)
- Row 8 / Column 2 → 1 (Hidden Single)
- Row 3 / Column 9 → 9 (Hidden Single)
- Row 7 / Column 6 → 9 (Hidden Single)
- Row 3 / Column 7 → 7 (Hidden Single)
- Row 8 / Column 9 → 6 (Hidden Single)
- Row 9 / Column 1 → 6 (Hidden Single)
- Row 1 / Column 7 → 6 (Hidden Single)
- Row 3 / Column 2 → 6 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 8 in b1 => r78c1<>8
- Locked Candidates Type 1 (Pointing): 1 in b6 => r2c9<>1
- Locked Candidates Type 1 (Pointing): 4 in b7 => r7c5<>4
- Locked Candidates Type 2 (Claiming): 5 in c3 => r7c12,r8c1<>5
- 2-String Kite: 3 in r3c6,r6c1 (connected by r4c6,r6c5) => r3c1<>3
- Turbot Fish: 3 r1c2 =3= r2c1 -3- r6c1 =3= r6c5 => r1c5<>3
- XY-Wing: 3/5/8 in r1c29,r3c1 => r3c8<>8
- XY-Wing: 4/8/3 in r49c6,r9c3 => r4c3<>3
- Row 4 / Column 3 → 2 (Naked Single)
- Row 5 / Column 9 → 2 (Hidden Single)
- Row 5 / Column 8 → 7 (Hidden Single)
- Row 7 / Column 9 → 7 (Hidden Single)
- Row 9 / Column 5 → 7 (Hidden Single)
- Row 6 / Column 7 → 5 (Hidden Single)
- Row 8 / Column 1 → 7 (Hidden Single)
- Row 9 / Column 6 → 4 (Hidden Single)
- Row 4 / Column 6 → 3 (Naked Single)
- Row 6 / Column 5 → 4 (Full House)
- Row 6 / Column 9 → 1 (Naked Single)
- Row 6 / Column 1 → 3 (Full House)
- Row 8 / Column 5 → 2 (Hidden Single)
- Row 7 / Column 1 → 2 (Hidden Single)
- Row 4 / Column 1 → 1 (Hidden Single)
- Row 1 / Column 2 → 3 (Hidden Single)
- Row 1 / Column 9 → 8 (Naked Single)
- Row 1 / Column 5 → 5 (Full House)
- Row 7 / Column 2 → 4 (Naked Single)
- Row 5 / Column 2 → 5 (Full House)
- Row 5 / Column 1 → 4 (Full House)
- Row 2 / Column 7 → 4 (Naked Single)
- Row 4 / Column 7 → 8 (Full House)
- Row 4 / Column 9 → 4 (Full House)
- Row 2 / Column 9 → 3 (Full House)
- Row 3 / Column 6 → 8 (Naked Single)
- Row 8 / Column 6 → 5 (Full House)
- Row 7 / Column 5 → 8 (Full House)
- Row 8 / Column 3 → 8 (Full House)
- Row 2 / Column 5 → 1 (Naked Single)
- Row 3 / Column 5 → 3 (Full House)
- Row 3 / Column 1 → 5 (Naked Single)
- Row 2 / Column 1 → 8 (Full House)
- Row 2 / Column 8 → 5 (Full House)
- Row 3 / Column 8 → 1 (Full House)
- Row 7 / Column 8 → 3 (Naked Single)
- Row 7 / Column 3 → 5 (Full House)
- Row 9 / Column 3 → 3 (Full House)
- Row 9 / Column 8 → 8 (Full House)
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