Solution for Hard Sudoku #2238427569198
5
4
9
6
8
2
3
1
7
7
8
2
9
1
3
5
6
4
1
6
3
7
4
5
2
9
8
2
3
5
4
7
6
1
9
8
6
9
8
1
3
5
4
2
7
4
7
1
9
8
2
3
5
6
7
6
1
9
2
3
8
5
4
3
5
9
8
4
6
2
7
1
8
2
4
5
1
7
6
3
9
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 6 → 2 (Naked Single)
- Row 2 / Column 6 → 3 (Naked Single)
- Row 3 / Column 6 → 4 (Naked Single)
- Row 6 / Column 6 → 7 (Naked Single)
- Row 7 / Column 6 → 9 (Full House)
- Row 4 / Column 5 → 9 (Hidden Single)
- Row 8 / Column 8 → 1 (Hidden Single)
- Row 5 / Column 5 → 3 (Hidden Single)
- Row 6 / Column 7 → 3 (Hidden Single)
- Row 3 / Column 1 → 3 (Hidden Single)
- Row 7 / Column 4 → 3 (Hidden Single)
- Row 3 / Column 3 → 7 (Hidden Single)
- Row 8 / Column 1 → 9 (Hidden Single)
- Row 9 / Column 9 → 9 (Hidden Single)
- Row 1 / Column 3 → 9 (Hidden Single)
- Row 3 / Column 8 → 9 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 5 in b3 => r78c9<>5
- Locked Candidates Type 1 (Pointing): 1 in b4 => r2c1<>1
- Locked Candidates Type 1 (Pointing): 2 in b9 => r7c5<>2
- Locked Candidates Type 2 (Claiming): 8 in c7 => r7c89,r8c9<>8
- 2-String Kite: 6 in r3c4,r6c9 (connected by r4c4,r6c5) => r3c9<>6
- Turbot Fish: 6 r1c8 =6= r2c9 -6- r6c9 =6= r6c5 => r1c5<>6
- XY-Wing: 6/8/5 in r1c18,r3c9 => r3c2<>5
- XY-Wing: 2/5/6 in r49c4,r9c7 => r4c7<>6
- Row 4 / Column 7 → 4 (Naked Single)
- Row 5 / Column 1 → 4 (Hidden Single)
- Row 5 / Column 2 → 7 (Hidden Single)
- Row 7 / Column 1 → 7 (Hidden Single)
- Row 9 / Column 5 → 7 (Hidden Single)
- Row 6 / Column 3 → 8 (Hidden Single)
- Row 8 / Column 9 → 7 (Hidden Single)
- Row 9 / Column 4 → 2 (Hidden Single)
- Row 4 / Column 4 → 6 (Naked Single)
- Row 6 / Column 5 → 2 (Full House)
- Row 6 / Column 1 → 1 (Naked Single)
- Row 6 / Column 9 → 6 (Full House)
- Row 8 / Column 5 → 4 (Hidden Single)
- Row 7 / Column 9 → 4 (Hidden Single)
- Row 4 / Column 9 → 1 (Hidden Single)
- Row 1 / Column 8 → 6 (Hidden Single)
- Row 1 / Column 1 → 5 (Naked Single)
- Row 1 / Column 5 → 8 (Full House)
- Row 7 / Column 8 → 2 (Naked Single)
- Row 5 / Column 8 → 8 (Full House)
- Row 5 / Column 9 → 2 (Full House)
- Row 2 / Column 3 → 2 (Naked Single)
- Row 4 / Column 3 → 5 (Full House)
- Row 4 / Column 1 → 2 (Full House)
- Row 2 / Column 1 → 6 (Full House)
- Row 3 / Column 4 → 5 (Naked Single)
- Row 8 / Column 4 → 8 (Full House)
- Row 7 / Column 5 → 5 (Full House)
- Row 8 / Column 7 → 5 (Full House)
- Row 2 / Column 5 → 1 (Naked Single)
- Row 3 / Column 5 → 6 (Full House)
- Row 3 / Column 9 → 8 (Naked Single)
- Row 2 / Column 9 → 5 (Full House)
- Row 2 / Column 2 → 8 (Full House)
- Row 3 / Column 2 → 1 (Full House)
- Row 7 / Column 2 → 6 (Naked Single)
- Row 7 / Column 7 → 8 (Full House)
- Row 9 / Column 7 → 6 (Full House)
- Row 9 / Column 2 → 5 (Full House)
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