Solution for Hard Sudoku #1389716253498
8
2
6
3
8
7
1
6
4
4
5
2
9
7
4
3
6
7
8
4
1
9
5
3
8
7
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 4 / Column 9 → 1 (Naked Single)
- Row 4 / Column 8 → 8 (Naked Single)
- Row 4 / Column 4 → 6 (Naked Single)
- Row 4 / Column 7 → 7 (Naked Single)
- Row 4 / Column 3 → 3 (Full House)
- Row 2 / Column 2 → 4 (Hidden Single)
- Row 5 / Column 6 → 3 (Hidden Single)
- Row 3 / Column 4 → 8 (Hidden Single)
- Row 5 / Column 5 → 8 (Hidden Single)
- Row 6 / Column 3 → 8 (Hidden Single)
- Row 9 / Column 7 → 8 (Hidden Single)
- Row 7 / Column 7 → 6 (Hidden Single)
- Row 1 / Column 1 → 3 (Hidden Single)
- Row 9 / Column 2 → 3 (Hidden Single)
- Row 7 / Column 9 → 3 (Hidden Single)
- Row 2 / Column 7 → 3 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 1 in b1 => r5c3<>1
- Locked Candidates Type 1 (Pointing): 2 in b3 => r1c23<>2
- Locked Candidates Type 1 (Pointing): 4 in b8 => r9c8<>4
- Locked Candidates Type 2 (Claiming): 9 in r3 => r1c23,r2c3<>9
- 2-String Kite: 5 in r1c4,r6c7 (connected by r5c4,r6c6) => r1c7<>5
- Turbot Fish: 5 r2c9 =5= r1c8 -5- r1c4 =5= r5c4 => r5c9<>5
- XY-Wing: 5/9/2 in r1c7,r29c9 => r8c7<>2
- XY-Wing: 1/2/5 in r36c1,r6c6 => r3c6<>5
- Row 3 / Column 6 → 7 (Naked Single)
- Row 9 / Column 5 → 7 (Hidden Single)
- Row 9 / Column 3 → 6 (Hidden Single)
- Row 8 / Column 5 → 6 (Hidden Single)
- Row 1 / Column 2 → 6 (Hidden Single)
- Row 5 / Column 1 → 6 (Hidden Single)
- Row 7 / Column 4 → 9 (Hidden Single)
- Row 1 / Column 3 → 7 (Hidden Single)
- Row 5 / Column 2 → 7 (Hidden Single)
- Row 5 / Column 4 → 1 (Hidden Single)
- Row 6 / Column 6 → 5 (Full House)
- Row 9 / Column 4 → 4 (Naked Single)
- Row 1 / Column 4 → 5 (Full House)
- Row 6 / Column 1 → 1 (Hidden Single)
- Row 2 / Column 3 → 1 (Hidden Single)
- Row 2 / Column 5 → 9 (Naked Single)
- Row 1 / Column 5 → 1 (Full House)
- Row 2 / Column 9 → 5 (Full House)
- Row 1 / Column 6 → 4 (Full House)
- Row 9 / Column 9 → 2 (Naked Single)
- Row 5 / Column 9 → 9 (Full House)
- Row 7 / Column 8 → 1 (Naked Single)
- Row 7 / Column 6 → 2 (Full House)
- Row 9 / Column 6 → 1 (Full House)
- Row 9 / Column 8 → 5 (Full House)
- Row 5 / Column 3 → 2 (Naked Single)
- Row 6 / Column 2 → 9 (Full House)
- Row 6 / Column 7 → 2 (Full House)
- Row 3 / Column 2 → 2 (Full House)
- Row 5 / Column 8 → 4 (Naked Single)
- Row 5 / Column 7 → 5 (Full House)
- Row 8 / Column 3 → 5 (Naked Single)
- Row 3 / Column 3 → 9 (Full House)
- Row 3 / Column 1 → 5 (Full House)
- Row 8 / Column 1 → 2 (Full House)
- Row 1 / Column 7 → 9 (Naked Single)
- Row 1 / Column 8 → 2 (Full House)
- Row 8 / Column 8 → 9 (Full House)
- Row 8 / Column 7 → 4 (Full House)
Show More...