1
2
5
6
9
4
3
8
7
8
6
7
5
3
1
2
9
4
9
3
4
2
7
8
1
6
5
9
5
2
8
1
3
4
7
6
7
8
3
4
5
6
1
2
9
6
4
1
7
9
2
8
5
3
5
4
9
2
3
8
7
6
1
6
1
9
7
5
3
4
3
7
4
1
6
5
9
This Sudoku Puzzle has 62 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, undefined, Uniqueness Test 1, Give Up techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 5 / Column 2 → 1 (Naked Single)
- Row 5 / Column 4 → 4 (Naked Single)
- Row 7 / Column 2 → 4 (Naked Single)
- Row 2 / Column 2 → 9 (Naked Single)
- Row 9 / Column 2 → 6 (Naked Single)
- Row 1 / Column 1 → 1 (Naked Single)
- Row 2 / Column 3 → 4 (Full House)
- Row 1 / Column 4 → 8 (Hidden Single)
- Row 1 / Column 5 → 6 (Hidden Single)
- Row 7 / Column 9 → 7 (Hidden Single)
- Row 9 / Column 3 → 1 (Hidden Single)
- Row 9 / Column 5 → 4 (Hidden Single)
- Row 1 / Column 7 → 9 (Hidden Single)
- Row 4 / Column 1 → 9 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 3 in b2 => r2c7<>3
- Locked Candidates Type 1 (Pointing): 1 in b3 => r46c7<>1
- Locked Candidates Type 1 (Pointing): 8 in b6 => r6c3<>8
- Locked Candidates Type 1 (Pointing): 2 in b7 => r8c4679<>2
- Locked Candidates Type 1 (Pointing): 8 in b7 => r8c67<>8
- Locked Candidates Type 2 (Claiming): 2 in c9 => r4c78<>2
- Naked Pair: 4,6 in r48c7 => r36c7<>6
- Row 3 / Column 8 → 6 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 2 in b3 => r7c7<>2
- XY-Wing: 1/2/3 in r2c5,r39c4 => r2c4,r7c5<>3
- Row 7 / Column 5 → 1 (Naked Single)
- Row 2 / Column 5 → 3 (Full House)
- Row 9 / Column 4 → 3 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 2 in b8 => r2c6<>2
- Uniqueness Test 1: 1/2 in r2c47,r3c47 => r2c4<>1, r2c4<>2
- Row 2 / Column 4 → 5 (Naked Single)
- Row 2 / Column 6 → 1 (Naked Single)
- Row 2 / Column 7 → 2 (Full House)
- Row 3 / Column 4 → 2 (Full House)
- Row 3 / Column 7 → 1 (Full House)
- Row 8 / Column 4 → 9 (Naked Single)
- Row 6 / Column 6 → 9 (Naked Single)
- Row 8 / Column 6 → 5 (Naked Single)
- Uniqueness Test 1: 4/6 in r4c79,r8c79 => r4c9<>4, r4c9<>6
- Uniqueness Test 1: 2/8 in r5c13,r8c13 => r5c3<>2, r5c3<>8
- Row 5 / Column 3 → 3 (Naked Single)
- Row 5 / Column 9 → 2 (Naked Single)
- Row 5 / Column 1 → 8 (Full House)
- Row 8 / Column 1 → 2 (Full House)
- Row 8 / Column 3 → 8 (Full House)
- Row 6 / Column 3 → 6 (Naked Single)
- Row 4 / Column 3 → 2 (Full House)
- Row 4 / Column 9 → 1 (Naked Single)
- Row 4 / Column 4 → 7 (Naked Single)
- Row 6 / Column 4 → 1 (Full House)
- Row 6 / Column 9 → 3 (Naked Single)
- Row 4 / Column 2 → 5 (Naked Single)
- Row 6 / Column 2 → 7 (Full House)
- Row 1 / Column 9 → 4 (Naked Single)
- Row 1 / Column 8 → 3 (Full House)
- Row 8 / Column 9 → 6 (Full House)
- Row 8 / Column 7 → 4 (Full House)
- Row 6 / Column 7 → 8 (Naked Single)
- Row 6 / Column 8 → 5 (Full House)
- Row 4 / Column 8 → 4 (Naked Single)
- Row 4 / Column 7 → 6 (Full House)
- Row 7 / Column 7 → 3 (Full House)
- Give Up: Don't know how to proceed!
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