6
9
5
4
3
2
8
1
7
4
2
7
8
1
6
5
9
3
1
3
8
7
5
9
6
4
2
1
5
8
3
2
4
7
6
9
9
7
2
1
6
8
3
4
5
4
6
3
9
7
5
8
2
1
2
8
1
9
4
3
5
7
6
7
3
4
6
5
1
2
8
9
5
9
6
2
8
7
3
1
4
This Sudoku Puzzle has 62 steps and it is solved using Naked Single, Full House, Hidden Single, Naked Pair, undefined, Hidden Triple, Locked Candidates Type 2 (Claiming), Naked Triple, Naked Quadruple techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 2 / Column 8 → 5 (Naked Single)
- Row 1 / Column 1 → 6 (Naked Single)
- Row 3 / Column 7 → 6 (Naked Single)
- Row 3 / Column 9 → 2 (Full House)
- Row 5 / Column 5 → 6 (Hidden Single)
- Row 7 / Column 1 → 2 (Hidden Single)
- Row 7 / Column 5 → 3 (Naked Single)
- Row 3 / Column 4 → 5 (Hidden Single)
- Row 9 / Column 7 → 3 (Hidden Single)
- Row 7 / Column 4 → 7 (Hidden Single)
- Row 9 / Column 9 → 4 (Hidden Single)
- Naked Pair: 1,4 in r7c36 => r7c89<>1
- 2-String Kite: 3 in r3c6,r6c2 (connected by r5c6,r6c4) => r3c2<>3
- Hidden Triple: 3,4,8 in r2c12,r3c1 => r3c1<>1
- Locked Candidates Type 2 (Claiming): 1 in c1 => r456c2,r56c3<>1
- Row 6 / Column 3 → 9 (Naked Single)
- Naked Triple: 1,2,6 in r46c8,r6c9 => r5c89<>1, r5c8<>2
- Naked Quadruple: 4,5,7,9 in r5c3789 => r5c12<>4, r5c2<>5
- 2-String Kite: 1 in r6c9,r9c4 (connected by r8c9,r9c8) => r6c4<>1
- Locked Candidates Type 2 (Claiming): 1 in r6 => r4c8<>1
- W-Wing: 1/4 in r4c1,r7c6 connected by 4 in r57c3 => r4c6<>1
- Row 4 / Column 6 → 2 (Naked Single)
- Row 1 / Column 6 → 7 (Naked Single)
- Row 4 / Column 8 → 6 (Naked Single)
- Row 6 / Column 4 → 3 (Naked Single)
- Row 1 / Column 3 → 5 (Naked Single)
- Row 6 / Column 9 → 1 (Naked Single)
- Row 7 / Column 8 → 9 (Naked Single)
- Row 2 / Column 4 → 8 (Naked Single)
- Row 1 / Column 2 → 9 (Naked Single)
- Row 1 / Column 5 → 2 (Full House)
- Row 5 / Column 3 → 4 (Naked Single)
- Row 6 / Column 8 → 2 (Naked Single)
- Row 6 / Column 2 → 6 (Full House)
- Row 8 / Column 9 → 7 (Naked Single)
- Row 5 / Column 8 → 7 (Naked Single)
- Row 7 / Column 7 → 5 (Naked Single)
- Row 3 / Column 5 → 9 (Naked Single)
- Row 3 / Column 6 → 3 (Full House)
- Row 9 / Column 5 → 8 (Full House)
- Row 5 / Column 4 → 1 (Naked Single)
- Row 5 / Column 6 → 8 (Full House)
- Row 9 / Column 4 → 2 (Full House)
- Row 9 / Column 8 → 1 (Full House)
- Row 8 / Column 8 → 8 (Full House)
- Row 7 / Column 9 → 6 (Full House)
- Row 5 / Column 9 → 5 (Full House)
- Row 3 / Column 2 → 1 (Naked Single)
- Row 4 / Column 1 → 1 (Naked Single)
- Row 4 / Column 2 → 5 (Naked Single)
- Row 4 / Column 7 → 4 (Full House)
- Row 5 / Column 7 → 9 (Full House)
- Row 7 / Column 3 → 1 (Naked Single)
- Row 3 / Column 3 → 7 (Full House)
- Row 3 / Column 1 → 8 (Full House)
- Row 8 / Column 2 → 4 (Full House)
- Row 7 / Column 6 → 4 (Full House)
- Row 8 / Column 6 → 1 (Full House)
- Row 5 / Column 1 → 3 (Naked Single)
- Row 2 / Column 1 → 4 (Full House)
- Row 2 / Column 2 → 3 (Full House)
- Row 5 / Column 2 → 2 (Full House)
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