4
2
3
5
2
3
6
7
2
3
6
5
4
5
8
6
9
6
5
3
2
4
5
6
9
7
8
7
6
2
4
7
6
This Sudoku Puzzle has 55 steps and it is solved using Hidden Single, Locked Triple, Naked Single, Full House, Locked Pair, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Hidden Pair techniques.
Naked Single
Explanation
Hidden Single
Explanation
Hidden Pair
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 7 / Column 5 → 9 (Hidden Single)
- Locked Triple: 1,2,5 in r789c3 => r16c3,r7c12,r8c12<>1, r1c3,r78c1<>5, r8c1<>2
- Row 1 / Column 1 → 5 (Hidden Single)
- Row 7 / Column 3 → 5 (Hidden Single)
- Row 1 / Column 2 → 6 (Hidden Single)
- Row 7 / Column 2 → 3 (Naked Single)
- Row 7 / Column 1 → 6 (Naked Single)
- Row 7 / Column 4 → 1 (Full House)
- Locked Pair: 4,5 in r89c5 => r1c5,r89c4<>4
- Row 9 / Column 5 → 4 (Hidden Single)
- Row 8 / Column 5 → 5 (Naked Single)
- Row 9 / Column 9 → 5 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 8 in b2 => r1c7<>8
- Locked Candidates Type 1 (Pointing): 8 in b7 => r8c89<>8
- Locked Candidates Type 2 (Claiming): 9 in c7 => r2c8<>9
- Locked Candidates Type 2 (Claiming): 8 in c9 => r5c8<>8
- Hidden Pair: 2,3 in r45c1 => r45c1<>1, r4c1<>4, r45c1<>7
- Row 4 / Column 6 → 4 (Hidden Single)
- Row 1 / Column 4 → 4 (Hidden Single)
- Row 5 / Column 5 → 1 (Hidden Single)
- Row 1 / Column 5 → 8 (Full House)
- Row 5 / Column 2 → 9 (Naked Single)
- Row 6 / Column 3 → 7 (Naked Single)
- Row 1 / Column 3 → 9 (Naked Single)
- Row 6 / Column 4 → 8 (Naked Single)
- Row 5 / Column 4 → 7 (Full House)
- Row 1 / Column 6 → 1 (Naked Single)
- Row 1 / Column 7 → 7 (Full House)
- Row 3 / Column 6 → 9 (Full House)
- Row 5 / Column 8 → 3 (Naked Single)
- Row 4 / Column 7 → 1 (Naked Single)
- Row 5 / Column 1 → 2 (Naked Single)
- Row 5 / Column 9 → 8 (Full House)
- Row 3 / Column 7 → 8 (Naked Single)
- Row 3 / Column 1 → 1 (Full House)
- Row 4 / Column 8 → 7 (Naked Single)
- Row 4 / Column 9 → 2 (Naked Single)
- Row 6 / Column 9 → 9 (Full House)
- Row 4 / Column 1 → 3 (Full House)
- Row 8 / Column 9 → 1 (Full House)
- Row 2 / Column 7 → 9 (Naked Single)
- Row 2 / Column 8 → 1 (Full House)
- Row 9 / Column 7 → 3 (Full House)
- Row 2 / Column 2 → 8 (Naked Single)
- Row 2 / Column 1 → 7 (Full House)
- Row 6 / Column 1 → 4 (Naked Single)
- Row 6 / Column 2 → 1 (Full House)
- Row 8 / Column 2 → 4 (Full House)
- Row 8 / Column 1 → 8 (Full House)
- Row 8 / Column 3 → 2 (Naked Single)
- Row 9 / Column 3 → 1 (Full House)
- Row 8 / Column 8 → 9 (Naked Single)
- Row 9 / Column 8 → 8 (Full House)
- Row 9 / Column 4 → 2 (Full House)
- Row 8 / Column 4 → 3 (Full House)
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