4
9
6
2
7
3
1
8
5
8
7
2
4
1
5
6
9
3
3
1
5
6
8
9
4
2
7
3
2
9
6
5
4
8
1
7
7
8
1
3
2
9
5
4
6
5
6
4
1
7
8
9
3
2
5
4
1
7
3
8
9
6
2
2
3
7
9
6
4
1
5
8
8
9
6
2
5
1
7
4
3
This Sudoku Puzzle has 62 steps and it is solved using Hidden Single, Naked Single, Naked Pair, undefined, Swordfish, Locked Candidates Type 2 (Claiming), Naked Triple, Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 6 / Column 2 → 1 (Hidden Single)
- Row 2 / Column 3 → 3 (Hidden Single)
- Row 2 / Column 9 → 9 (Naked Single)
- Row 3 / Column 9 → 7 (Naked Single)
- Row 9 / Column 2 → 6 (Hidden Single)
- Naked Pair: 2,6 in r2c7,r3c8 => r1c78<>2
- X-Wing: 3 c49 r59 => r5c7,r9c58<>3
- X-Wing: 5 r39 c35 => r7c5<>5
- X-Wing: 6 r34 c48 => r25c4,r6c8<>6
- Row 2 / Column 4 → 4 (Naked Single)
- Swordfish: 2 r349 c238 => r1c2,r8c3<>2
- Naked Pair: 4,8 in r7c2,r8c3 => r78c1,r9c3<>4, r78c1<>8
- Locked Candidates Type 2 (Claiming): 8 in c1 => r4c23,r5c3<>8
- Naked Triple: 2,4,9 in r4c23,r5c3 => r56c1<>4
- Row 1 / Column 1 → 4 (Hidden Single)
- Row 1 / Column 2 → 9 (Naked Single)
- Row 1 / Column 5 → 7 (Naked Single)
- Row 1 / Column 6 → 2 (Naked Single)
- Row 4 / Column 4 → 7 (Hidden Single)
- Row 4 / Column 8 → 6 (Hidden Single)
- Row 3 / Column 8 → 2 (Naked Single)
- Row 2 / Column 7 → 6 (Naked Single)
- Row 3 / Column 2 → 8 (Naked Single)
- Row 2 / Column 6 → 5 (Naked Single)
- Row 2 / Column 1 → 2 (Full House)
- Row 3 / Column 3 → 5 (Full House)
- Row 7 / Column 2 → 4 (Naked Single)
- Row 4 / Column 2 → 2 (Full House)
- Row 3 / Column 5 → 9 (Naked Single)
- Row 3 / Column 4 → 6 (Full House)
- Row 8 / Column 1 → 7 (Naked Single)
- Row 9 / Column 3 → 2 (Naked Single)
- Row 8 / Column 3 → 8 (Naked Single)
- Row 7 / Column 1 → 5 (Full House)
- Row 7 / Column 5 → 3 (Naked Single)
- Row 7 / Column 8 → 9 (Naked Single)
- Row 9 / Column 4 → 1 (Naked Single)
- Row 7 / Column 6 → 7 (Naked Single)
- Row 7 / Column 7 → 8 (Full House)
- Row 8 / Column 4 → 9 (Naked Single)
- Row 5 / Column 4 → 3 (Full House)
- Row 9 / Column 8 → 4 (Naked Single)
- Row 8 / Column 6 → 4 (Naked Single)
- Row 9 / Column 5 → 5 (Full House)
- Row 9 / Column 9 → 3 (Full House)
- Row 6 / Column 8 → 3 (Naked Single)
- Row 1 / Column 8 → 1 (Full House)
- Row 1 / Column 7 → 3 (Full House)
- Row 8 / Column 9 → 1 (Naked Single)
- Row 8 / Column 7 → 2 (Full House)
- Row 6 / Column 7 → 9 (Naked Single)
- Row 5 / Column 7 → 1 (Full House)
- Row 6 / Column 6 → 6 (Naked Single)
- Row 5 / Column 6 → 9 (Full House)
- Row 6 / Column 1 → 8 (Naked Single)
- Row 5 / Column 1 → 6 (Full House)
- Row 6 / Column 5 → 4 (Full House)
- Row 4 / Column 5 → 8 (Full House)
- Row 5 / Column 3 → 4 (Naked Single)
- Row 4 / Column 3 → 9 (Full House)
- Row 4 / Column 9 → 4 (Full House)
- Row 5 / Column 9 → 8 (Full House)
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