5
6
7
8
9
1
3
2
4
4
2
1
3
6
7
8
9
5
3
8
9
2
4
5
7
1
6
1
3
2
4
5
6
9
7
8
6
8
9
1
7
2
5
3
4
5
7
4
9
3
8
1
6
2
6
8
9
2
4
3
7
1
5
7
5
3
9
1
6
2
4
8
4
2
1
8
5
7
6
9
3
This Sudoku Puzzle has 66 steps and it is solved using Hidden Single, undefined, Naked Pair, Locked Candidates Type 1 (Pointing), Naked Single, Naked Triple, Swordfish, Locked Candidates Type 2 (Claiming), Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 8 / Column 6 → 6 (Hidden Single)
- Row 2 / Column 6 → 7 (Hidden Single)
- X-Wing: 6 c39 r35 => r3c28,r5c1<>6
- Naked Pair: 1,2 in r3c28 => r3c3<>1, r3c356<>2
- Row 1 / Column 5 → 2 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 3 in b2 => r6c4<>3
- Naked Pair: 6,8 in r1c28 => r1c1<>6, r1c17<>8
- Row 1 / Column 7 → 3 (Naked Single)
- Row 2 / Column 4 → 3 (Hidden Single)
- Naked Triple: 5,6,8 in r1c8,r23c9 => r2c7<>8
- Swordfish: 4 r349 c359 => r5c39,r7c5<>4
- Naked Triple: 5,6,8 in r235c9 => r489c9<>8
- Swordfish: 5 r167 c145 => r2c1,r39c5<>5
- Naked Pair: 2,8 in r28c1 => r57c1<>2, r7c1<>8
- Swordfish: 9 r349 c568 => r5c6,r6c58<>9
- Naked Triple: 2,6,8 in r5c369 => r5c7<>8
- Locked Candidates Type 2 (Claiming): 8 in c7 => r79c8<>8
- Row 9 / Column 8 → 9 (Naked Single)
- Row 8 / Column 4 → 9 (Hidden Single)
- Row 5 / Column 4 → 1 (Naked Single)
- Row 6 / Column 4 → 5 (Naked Single)
- Row 1 / Column 4 → 4 (Naked Single)
- Row 7 / Column 4 → 7 (Full House)
- Row 6 / Column 5 → 3 (Naked Single)
- Row 1 / Column 1 → 5 (Naked Single)
- Row 3 / Column 5 → 9 (Naked Single)
- Row 3 / Column 6 → 5 (Full House)
- Row 7 / Column 8 → 2 (Naked Single)
- Row 7 / Column 1 → 6 (Naked Single)
- Row 4 / Column 5 → 8 (Naked Single)
- Row 3 / Column 9 → 6 (Naked Single)
- Row 9 / Column 6 → 8 (Naked Single)
- Row 3 / Column 8 → 1 (Naked Single)
- Row 8 / Column 7 → 8 (Naked Single)
- Row 6 / Column 1 → 9 (Naked Single)
- Row 7 / Column 2 → 8 (Naked Single)
- Row 4 / Column 8 → 7 (Naked Single)
- Row 5 / Column 6 → 2 (Naked Single)
- Row 4 / Column 6 → 9 (Full House)
- Row 7 / Column 5 → 5 (Naked Single)
- Row 9 / Column 5 → 4 (Full House)
- Row 7 / Column 7 → 4 (Full House)
- Row 1 / Column 8 → 8 (Naked Single)
- Row 1 / Column 2 → 6 (Full House)
- Row 6 / Column 8 → 6 (Full House)
- Row 3 / Column 3 → 4 (Naked Single)
- Row 3 / Column 2 → 2 (Full House)
- Row 5 / Column 9 → 8 (Naked Single)
- Row 2 / Column 7 → 2 (Naked Single)
- Row 2 / Column 9 → 5 (Full House)
- Row 8 / Column 1 → 2 (Naked Single)
- Row 5 / Column 1 → 4 (Naked Single)
- Row 2 / Column 1 → 8 (Full House)
- Row 2 / Column 3 → 1 (Full House)
- Row 6 / Column 7 → 1 (Naked Single)
- Row 5 / Column 7 → 9 (Full House)
- Row 4 / Column 9 → 4 (Full House)
- Row 5 / Column 3 → 6 (Full House)
- Row 6 / Column 2 → 7 (Full House)
- Row 9 / Column 9 → 3 (Naked Single)
- Row 8 / Column 9 → 7 (Full House)
- Row 8 / Column 3 → 3 (Full House)
- Row 4 / Column 2 → 3 (Naked Single)
- Row 9 / Column 2 → 1 (Full House)
- Row 9 / Column 3 → 5 (Full House)
- Row 4 / Column 3 → 2 (Full House)
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