4
2
3
5
1
7
6
9
8
8
7
6
3
4
9
5
1
2
5
9
1
6
2
8
3
4
7
2
3
5
8
7
4
9
6
1
7
9
1
6
2
5
4
8
3
4
8
6
1
3
9
7
5
2
1
4
9
3
5
2
7
8
6
2
3
7
1
6
8
9
5
4
8
6
5
9
7
4
2
1
3
This Sudoku Puzzle has 63 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Triple, Naked Single, undefined, Full House, Turbot Fish, Locked Candidates Type 2 (Claiming) techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 5 / Column 8 → 3 (Hidden Single)
- Row 6 / Column 5 → 8 (Hidden Single)
- Row 9 / Column 4 → 9 (Hidden Single)
- Row 6 / Column 8 → 5 (Hidden Single)
- Row 6 / Column 1 → 9 (Hidden Single)
- Row 4 / Column 5 → 9 (Hidden Single)
- Row 8 / Column 7 → 9 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 8 in b8 => r1c6<>8
- Naked Triple: 2,4,6 in r2c578 => r2c1349<>2, r2c149<>6, r2c9<>4
- Row 2 / Column 9 → 8 (Naked Single)
- Row 3 / Column 1 → 6 (Hidden Single)
- Row 1 / Column 4 → 8 (Hidden Single)
- Row 1 / Column 3 → 3 (Hidden Single)
- Row 2 / Column 4 → 3 (Hidden Single)
- Row 8 / Column 1 → 3 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 2 in b1 => r5789c2<>2
- Locked Candidates Type 1 (Pointing): 5 in b2 => r3c2<>5
- W-Wing: 5/7 in r2c1,r5c2 connected by 7 in r26c3 => r4c1<>5
- Row 4 / Column 1 → 2 (Naked Single)
- Row 9 / Column 1 → 7 (Naked Single)
- Row 2 / Column 1 → 5 (Full House)
- Row 7 / Column 2 → 4 (Naked Single)
- Row 2 / Column 3 → 7 (Naked Single)
- Row 9 / Column 2 → 8 (Naked Single)
- Row 6 / Column 3 → 1 (Naked Single)
- Row 8 / Column 2 → 5 (Naked Single)
- Row 8 / Column 3 → 2 (Full House)
- Row 4 / Column 3 → 5 (Full House)
- Row 5 / Column 2 → 7 (Full House)
- Row 6 / Column 9 → 2 (Naked Single)
- Row 6 / Column 7 → 7 (Full House)
- Row 7 / Column 6 → 7 (Hidden Single)
- Row 8 / Column 6 → 8 (Hidden Single)
- Turbot Fish: 6 r1c6 =6= r2c5 -6- r8c5 =6= r8c9 => r1c9<>6
- Row 1 / Column 9 → 1 (Naked Single)
- Row 9 / Column 8 → 1 (Hidden Single)
- Locked Candidates Type 2 (Claiming): 4 in c8 => r2c7<>4
- W-Wing: 6/2 in r1c6,r2c7 connected by 2 in r9c67 => r1c8,r2c5<>6
- Row 1 / Column 6 → 6 (Hidden Single)
- Row 4 / Column 6 → 1 (Naked Single)
- Row 3 / Column 5 → 1 (Hidden Single)
- Row 5 / Column 7 → 1 (Hidden Single)
- W-Wing: 4/2 in r2c5,r9c6 connected by 2 in r29c7 => r3c6,r8c5<>4
- Row 8 / Column 5 → 6 (Naked Single)
- Row 8 / Column 9 → 4 (Full House)
- Row 4 / Column 9 → 6 (Full House)
- Row 4 / Column 7 → 4 (Full House)
- Row 5 / Column 5 → 2 (Naked Single)
- Row 2 / Column 5 → 4 (Full House)
- Row 7 / Column 4 → 2 (Naked Single)
- Row 7 / Column 8 → 6 (Full House)
- Row 9 / Column 7 → 2 (Full House)
- Row 9 / Column 6 → 4 (Full House)
- Row 2 / Column 7 → 6 (Full House)
- Row 2 / Column 8 → 2 (Full House)
- Row 5 / Column 6 → 5 (Naked Single)
- Row 3 / Column 6 → 2 (Full House)
- Row 3 / Column 4 → 5 (Full House)
- Row 5 / Column 4 → 6 (Full House)
- Row 1 / Column 8 → 9 (Naked Single)
- Row 1 / Column 2 → 2 (Full House)
- Row 3 / Column 2 → 9 (Full House)
- Row 3 / Column 8 → 4 (Full House)
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