4
8
3
7
9
1
2
6
5
7
1
5
2
4
6
8
9
3
6
9
2
5
3
8
7
1
4
1
2
6
3
5
4
8
7
9
4
5
7
9
8
2
6
3
1
3
8
9
1
6
7
2
4
5
5
1
8
9
3
2
6
4
7
3
7
4
5
6
8
1
2
9
9
2
6
4
7
1
8
5
3
This Sudoku Puzzle has 61 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 2 (Claiming), Naked Triple, Hidden Pair, undefined, Skyscraper techniques.
Naked Single
Explanation
Hidden Single
Explanation
Hidden Pair
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 1 / Column 6 → 5 (Naked Single)
- Row 3 / Column 8 → 1 (Naked Single)
- Row 1 / Column 5 → 1 (Naked Single)
- Row 1 / Column 8 → 9 (Full House)
- Row 6 / Column 1 → 8 (Hidden Single)
- Row 7 / Column 8 → 2 (Hidden Single)
- Row 9 / Column 2 → 4 (Hidden Single)
- Row 5 / Column 3 → 4 (Hidden Single)
- Locked Candidates Type 2 (Claiming): 3 in c5 => r6c4<>3
- Naked Triple: 1,5,6 in r7c12,r9c1 => r8c13<>1, r8c13<>6
- Locked Candidates Type 2 (Claiming): 1 in r8 => r7c9<>1
- Hidden Pair: 2,3 in r46c7 => r4c7<>1, r46c7<>5
- 2-String Kite: 4 in r2c5,r7c9 (connected by r7c6,r8c5) => r2c9<>4
- 2-String Kite: 6 in r5c8,r8c5 (connected by r8c9,r9c8) => r5c5<>6
- W-Wing: 8/5 in r2c9,r5c5 connected by 5 in r6c59 => r2c5<>8
- Row 2 / Column 9 → 8 (Hidden Single)
- Row 3 / Column 9 → 4 (Naked Single)
- Row 3 / Column 7 → 7 (Naked Single)
- Row 2 / Column 7 → 5 (Full House)
- Row 5 / Column 7 → 1 (Naked Single)
- Row 8 / Column 7 → 4 (Naked Single)
- Row 8 / Column 5 → 6 (Naked Single)
- Row 2 / Column 5 → 4 (Naked Single)
- Row 8 / Column 9 → 1 (Naked Single)
- Row 9 / Column 4 → 1 (Naked Single)
- Row 2 / Column 6 → 6 (Naked Single)
- Row 7 / Column 4 → 3 (Naked Single)
- Row 7 / Column 6 → 4 (Full House)
- Row 3 / Column 6 → 3 (Full House)
- Row 3 / Column 4 → 8 (Full House)
- Row 5 / Column 5 → 8 (Hidden Single)
- Row 2 / Column 1 → 7 (Hidden Single)
- Locked Candidates Type 2 (Claiming): 6 in c3 => r4c12,r5c2<>6
- Skyscraper: 5 in r5c2,r9c1 (connected by r59c8) => r4c1,r7c2<>5
- XY-Chain: 1 1- r2c2 -9- r5c2 -5- r5c8 -6- r9c8 -5- r9c1 -6- r7c2 -1 => r4c2<>1
- XY-Chain: 9 9- r5c2 -5- r5c8 -6- r9c8 -5- r9c1 -6- r3c1 -2- r8c1 -9 => r4c1<>9
- Row 8 / Column 1 → 9 (Hidden Single)
- Row 8 / Column 3 → 2 (Full House)
- Row 6 / Column 7 → 2 (Hidden Single)
- Row 4 / Column 7 → 3 (Full House)
- Row 4 / Column 5 → 5 (Naked Single)
- Row 6 / Column 5 → 3 (Full House)
- Row 5 / Column 2 → 5 (Hidden Single)
- Row 5 / Column 8 → 6 (Naked Single)
- Row 5 / Column 4 → 9 (Full House)
- Row 9 / Column 8 → 5 (Full House)
- Row 6 / Column 4 → 6 (Full House)
- Row 7 / Column 9 → 6 (Full House)
- Row 9 / Column 1 → 6 (Full House)
- Row 4 / Column 9 → 9 (Naked Single)
- Row 6 / Column 9 → 5 (Full House)
- Row 6 / Column 3 → 9 (Full House)
- Row 7 / Column 2 → 1 (Naked Single)
- Row 7 / Column 1 → 5 (Full House)
- Row 3 / Column 1 → 2 (Naked Single)
- Row 3 / Column 2 → 6 (Full House)
- Row 4 / Column 1 → 1 (Full House)
- Row 4 / Column 2 → 2 (Naked Single)
- Row 2 / Column 2 → 9 (Full House)
- Row 2 / Column 3 → 1 (Full House)
- Row 4 / Column 3 → 6 (Full House)
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