2
9
4
3
7
4
9
7
6
3
3
5
8
1
3
6
8
1
2
9
2
9
4
8
8
5
This Sudoku Puzzle has 59 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing), undefined techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 2 / Column 6 → 5 (Naked Single)
- Row 2 / Column 8 → 1 (Naked Single)
- Row 2 / Column 4 → 8 (Naked Single)
- Row 2 / Column 2 → 3 (Full House)
- Row 5 / Column 1 → 9 (Hidden Single)
- Row 1 / Column 2 → 5 (Hidden Single)
- Row 4 / Column 8 → 5 (Hidden Single)
- Row 3 / Column 9 → 5 (Hidden Single)
- Row 5 / Column 4 → 5 (Hidden Single)
- Locked Pair: 3,6 in r78c6 => r46c6,r79c5,r8c4<>6
- Locked Candidates Type 1 (Pointing): 2 in b2 => r5c5<>2
- Row 5 / Column 5 → 7 (Naked Single)
- Row 7 / Column 5 → 5 (Naked Single)
- Row 9 / Column 5 → 1 (Naked Single)
- Row 8 / Column 4 → 7 (Naked Single)
- Row 8 / Column 8 → 4 (Naked Single)
- Row 9 / Column 3 → 5 (Hidden Single)
- Row 3 / Column 4 → 1 (Hidden Single)
- Row 8 / Column 9 → 1 (Hidden Single)
- Row 7 / Column 1 → 4 (Hidden Single)
- Row 7 / Column 3 → 3 (Hidden Single)
- Row 7 / Column 6 → 6 (Naked Single)
- Row 8 / Column 6 → 3 (Full House)
- Row 7 / Column 7 → 9 (Naked Single)
- Row 7 / Column 9 → 7 (Full House)
- Row 9 / Column 8 → 2 (Naked Single)
- Row 1 / Column 8 → 9 (Naked Single)
- Row 6 / Column 8 → 7 (Full House)
- Row 9 / Column 9 → 3 (Naked Single)
- Row 9 / Column 7 → 6 (Full House)
- Row 9 / Column 1 → 7 (Full House)
- Row 1 / Column 1 → 1 (Hidden Single)
- Row 4 / Column 9 → 9 (Hidden Single)
- Row 4 / Column 4 → 6 (Naked Single)
- Row 6 / Column 4 → 9 (Full House)
- Row 4 / Column 2 → 7 (Hidden Single)
- Row 5 / Column 7 → 3 (Hidden Single)
- Row 3 / Column 3 → 7 (Hidden Single)
- W-Wing: 4/2 in r5c9,r6c6 connected by 2 in r4c67 => r6c7<>4
- XY-Chain: 2 2- r3c7 -8- r3c1 -6- r1c3 -8- r5c3 -4- r5c9 -2 => r1c9,r46c7<>2
- Row 1 / Column 9 → 4 (Naked Single)
- Row 5 / Column 9 → 2 (Full House)
- Row 6 / Column 7 → 1 (Naked Single)
- Row 4 / Column 7 → 4 (Full House)
- Row 5 / Column 2 → 8 (Naked Single)
- Row 5 / Column 3 → 4 (Full House)
- Row 4 / Column 3 → 1 (Naked Single)
- Row 4 / Column 6 → 2 (Full House)
- Row 6 / Column 6 → 4 (Full House)
- Row 8 / Column 2 → 6 (Naked Single)
- Row 6 / Column 2 → 2 (Full House)
- Row 6 / Column 3 → 6 (Full House)
- Row 8 / Column 1 → 8 (Full House)
- Row 1 / Column 3 → 8 (Full House)
- Row 3 / Column 1 → 6 (Full House)
- Row 1 / Column 7 → 2 (Naked Single)
- Row 1 / Column 5 → 6 (Full House)
- Row 3 / Column 5 → 2 (Full House)
- Row 3 / Column 7 → 8 (Full House)
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