6
3
1
4
1
7
8
6
4
2
9
6
7
5
7
2
6
9
4
3
8
9
This Sudoku Puzzle has 65 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing), undefined, Hidden Rectangle techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 1 / Column 6 → 5 (Naked Single)
- Row 3 / Column 6 → 8 (Naked Single)
- Row 2 / Column 6 → 6 (Naked Single)
- Row 8 / Column 6 → 1 (Naked Single)
- Row 5 / Column 6 → 7 (Full House)
- Row 7 / Column 8 → 7 (Hidden Single)
- Row 9 / Column 9 → 1 (Naked Single)
- Row 9 / Column 7 → 5 (Naked Single)
- Row 9 / Column 8 → 6 (Naked Single)
- Row 9 / Column 5 → 7 (Hidden Single)
- Row 2 / Column 1 → 8 (Hidden Single)
- Row 9 / Column 1 → 9 (Naked Single)
- Row 9 / Column 3 → 8 (Full House)
- Row 2 / Column 9 → 7 (Hidden Single)
- Row 3 / Column 8 → 1 (Hidden Single)
- Row 2 / Column 8 → 5 (Hidden Single)
- Row 1 / Column 9 → 4 (Hidden Single)
- Row 2 / Column 5 → 4 (Hidden Single)
- Locked Pair: 2,3 in r4c89 => r4c137,r5c7<>2, r4c13457,r5c7,r6c8<>3
- Row 6 / Column 8 → 4 (Naked Single)
- Locked Candidates Type 1 (Pointing): 3 in b2 => r56c5<>3
- X-Wing: 2 r27 c47 => r18c7,r8c4<>2
- Hidden Rectangle: 7/9 in r1c23,r4c23 => r4c3<>9
- 2-String Kite: 9 in r3c5,r6c3 (connected by r1c3,r3c2) => r6c5<>9
- XY-Chain: 9 9- r1c7 -3- r3c9 -2- r3c1 -5- r3c2 -9 => r1c23<>9
- Row 1 / Column 2 → 7 (Naked Single)
- Row 1 / Column 3 → 2 (Naked Single)
- Row 3 / Column 1 → 5 (Naked Single)
- Row 3 / Column 2 → 9 (Full House)
- Row 4 / Column 1 → 1 (Naked Single)
- Row 4 / Column 7 → 8 (Naked Single)
- Row 6 / Column 1 → 3 (Naked Single)
- Row 5 / Column 7 → 1 (Naked Single)
- Row 5 / Column 3 → 5 (Naked Single)
- Row 7 / Column 1 → 4 (Naked Single)
- Row 5 / Column 1 → 2 (Full House)
- Row 4 / Column 2 → 6 (Naked Single)
- Row 5 / Column 5 → 8 (Naked Single)
- Row 7 / Column 3 → 3 (Naked Single)
- Row 4 / Column 3 → 7 (Naked Single)
- Row 6 / Column 2 → 8 (Naked Single)
- Row 6 / Column 3 → 9 (Naked Single)
- Row 5 / Column 2 → 4 (Full House)
- Row 5 / Column 4 → 3 (Full House)
- Row 8 / Column 3 → 6 (Full House)
- Row 8 / Column 2 → 5 (Naked Single)
- Row 7 / Column 2 → 1 (Full House)
- Row 6 / Column 5 → 1 (Naked Single)
- Row 6 / Column 4 → 6 (Full House)
- Row 7 / Column 7 → 2 (Naked Single)
- Row 7 / Column 4 → 5 (Full House)
- Row 8 / Column 4 → 8 (Naked Single)
- Row 8 / Column 5 → 2 (Full House)
- Row 2 / Column 7 → 9 (Naked Single)
- Row 2 / Column 4 → 2 (Full House)
- Row 4 / Column 4 → 9 (Full House)
- Row 4 / Column 5 → 5 (Full House)
- Row 8 / Column 8 → 3 (Naked Single)
- Row 4 / Column 8 → 2 (Full House)
- Row 8 / Column 7 → 4 (Full House)
- Row 1 / Column 7 → 3 (Full House)
- Row 4 / Column 9 → 3 (Full House)
- Row 1 / Column 5 → 9 (Full House)
- Row 3 / Column 5 → 3 (Full House)
- Row 3 / Column 9 → 2 (Full House)
Show More...