8
3
1
2
5
6
4
7
9
2
4
5
8
7
9
6
1
3
9
6
7
3
1
4
8
5
2
6
9
7
1
4
8
3
2
5
3
5
2
7
9
6
4
8
1
4
8
1
2
3
5
6
7
9
5
6
2
7
8
3
9
1
4
9
3
7
1
2
4
5
6
8
1
4
8
5
9
6
7
2
3
This Sudoku Puzzle has 63 steps and it is solved using Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), Full House, undefined techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 9 / Column 2 → 1 (Naked Single)
- Row 2 / Column 6 → 9 (Hidden Single)
- Row 6 / Column 9 → 9 (Hidden Single)
- Row 4 / Column 2 → 9 (Hidden Single)
- Row 7 / Column 4 → 9 (Hidden Single)
- Row 1 / Column 3 → 1 (Hidden Single)
- Row 8 / Column 8 → 9 (Hidden Single)
- Row 4 / Column 9 → 1 (Hidden Single)
- Row 5 / Column 2 → 4 (Hidden Single)
- Row 1 / Column 1 → 8 (Hidden Single)
- Row 6 / Column 4 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 2 in b1 => r2c579<>2
- Row 2 / Column 5 → 7 (Naked Single)
- Row 3 / Column 2 → 7 (Hidden Single)
- Row 7 / Column 2 → 6 (Naked Single)
- Row 1 / Column 2 → 3 (Full House)
- Row 5 / Column 4 → 7 (Hidden Single)
- Row 7 / Column 6 → 7 (Hidden Single)
- Row 7 / Column 3 → 2 (Naked Single)
- Row 2 / Column 3 → 6 (Naked Single)
- Row 2 / Column 1 → 2 (Full House)
- Row 2 / Column 9 → 4 (Naked Single)
- Row 2 / Column 7 → 3 (Full House)
- Row 7 / Column 9 → 8 (Naked Single)
- Row 7 / Column 8 → 4 (Full House)
- Row 3 / Column 6 → 3 (Hidden Single)
- Row 9 / Column 6 → 8 (Hidden Single)
- Row 4 / Column 7 → 4 (Hidden Single)
- Row 5 / Column 8 → 3 (Hidden Single)
- Row 5 / Column 3 → 8 (Naked Single)
- Row 3 / Column 5 → 1 (Hidden Single)
- Row 6 / Column 6 → 1 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 6 in b5 => r1c6<>6
- 2-String Kite: 2 in r5c7,r8c5 (connected by r4c5,r5c6) => r8c7<>2
- 2-String Kite: 2 in r4c5,r9c8 (connected by r8c5,r9c4) => r4c8<>2
- Row 5 / Column 7 → 2 (Hidden Single)
- Row 5 / Column 6 → 6 (Full House)
- 2-String Kite: 2 in r3c9,r9c4 (connected by r8c9,r9c8) => r3c4<>2
- Locked Candidates Type 1 (Pointing): 2 in b2 => r1c8<>2
- 2-String Kite: 5 in r3c7,r9c4 (connected by r8c7,r9c8) => r3c4<>5
- Row 3 / Column 4 → 6 (Naked Single)
- Row 3 / Column 9 → 2 (Naked Single)
- Row 8 / Column 9 → 6 (Full House)
- Row 8 / Column 7 → 5 (Naked Single)
- Row 9 / Column 8 → 2 (Full House)
- Row 9 / Column 4 → 5 (Full House)
- Row 8 / Column 5 → 2 (Full House)
- Row 1 / Column 4 → 2 (Full House)
- Row 1 / Column 6 → 5 (Full House)
- Row 1 / Column 8 → 6 (Full House)
- Row 4 / Column 6 → 2 (Full House)
- Row 3 / Column 7 → 8 (Naked Single)
- Row 3 / Column 8 → 5 (Full House)
- Row 4 / Column 8 → 8 (Full House)
- Row 6 / Column 7 → 6 (Full House)
- Row 4 / Column 5 → 5 (Naked Single)
- Row 6 / Column 5 → 8 (Full House)
- Row 6 / Column 1 → 3 (Naked Single)
- Row 6 / Column 3 → 5 (Full House)
- Row 4 / Column 3 → 7 (Naked Single)
- Row 4 / Column 1 → 6 (Full House)
- Row 8 / Column 1 → 7 (Full House)
- Row 8 / Column 3 → 3 (Full House)
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