2
8
9
5
2
4
3
7
1
1
6
7
5
5
2
9
8
1
5
1
4
6
1
8
5
8
7
1
4
2
7
2
8
3
This Sudoku Puzzle has 42 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Uniqueness Test 1, Give Up techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 5 / Column 9 → 3 (Naked Single)
- Row 5 / Column 1 → 4 (Full House)
- Row 3 / Column 8 → 5 (Naked Single)
- Row 3 / Column 9 → 6 (Naked Single)
- Row 4 / Column 4 → 4 (Hidden Single)
- Row 1 / Column 1 → 1 (Hidden Single)
- Row 4 / Column 7 → 7 (Hidden Single)
- Row 2 / Column 4 → 1 (Hidden Single)
- Row 9 / Column 9 → 1 (Hidden Single)
- Row 2 / Column 2 → 5 (Hidden Single)
- Row 8 / Column 9 → 5 (Hidden Single)
- Row 7 / Column 6 → 5 (Hidden Single)
- Row 7 / Column 2 → 2 (Hidden Single)
- Row 4 / Column 6 → 6 (Hidden Single)
- Row 2 / Column 6 → 9 (Naked Single)
- Row 1 / Column 7 → 2 (Hidden Single)
- Row 7 / Column 9 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 6 in b1 => r8c3<>6
- Locked Candidates Type 1 (Pointing): 6 in b2 => r7c5<>6
- Row 7 / Column 5 → 3 (Naked Single)
- Locked Candidates Type 1 (Pointing): 3 in b5 => r6c23<>3
- Row 6 / Column 2 → 9 (Naked Single)
- Row 4 / Column 1 → 3 (Naked Single)
- Row 9 / Column 2 → 7 (Naked Single)
- Row 3 / Column 1 → 7 (Naked Single)
- Row 3 / Column 4 → 3 (Full House)
- Row 1 / Column 6 → 7 (Naked Single)
- Row 6 / Column 6 → 3 (Full House)
- Row 6 / Column 4 → 7 (Full House)
- Uniqueness Test 1: 3/4 in r1c23,r8c23 => r1c3<>3, r1c3<>4
- Row 1 / Column 3 → 6 (Naked Single)
- Row 1 / Column 5 → 8 (Naked Single)
- Row 2 / Column 5 → 6 (Full House)
- Row 2 / Column 3 → 4 (Naked Single)
- Row 1 / Column 2 → 3 (Full House)
- Row 2 / Column 8 → 8 (Full House)
- Row 8 / Column 2 → 4 (Full House)
- Row 1 / Column 9 → 9 (Naked Single)
- Row 1 / Column 8 → 4 (Full House)
- Row 4 / Column 8 → 9 (Full House)
- Row 8 / Column 3 → 3 (Naked Single)
- Give Up: Don't know how to proceed!
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