2
7
8
5
6
4
1
9
7
9
6
2
5
8
4
3
7
5
9
6
3
7
4
6
This Sudoku Puzzle has 68 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), Naked Triple, Hidden Pair, undefined techniques.
Naked Single
Explanation
Hidden Single
Explanation
Hidden Pair
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 3 / Column 6 → 9 (Naked Single)
- Row 5 / Column 2 → 6 (Hidden Single)
- Row 5 / Column 8 → 2 (Hidden Single)
- Row 6 / Column 4 → 8 (Hidden Single)
- Row 6 / Column 9 → 6 (Hidden Single)
- Row 1 / Column 2 → 9 (Hidden Single)
- Row 8 / Column 5 → 9 (Hidden Single)
- Row 7 / Column 6 → 5 (Hidden Single)
- Row 5 / Column 6 → 1 (Naked Single)
- Row 5 / Column 4 → 3 (Naked Single)
- Row 5 / Column 5 → 5 (Full House)
- Row 9 / Column 6 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 2 in b3 => r1c4<>2
- Locked Candidates Type 1 (Pointing): 5 in b3 => r1c3<>5
- Locked Candidates Type 1 (Pointing): 4 in b5 => r29c5<>4
- Locked Candidates Type 1 (Pointing): 7 in b5 => r29c5<>7
- Row 9 / Column 4 → 7 (Hidden Single)
- Row 9 / Column 2 → 4 (Hidden Single)
- Row 7 / Column 4 → 4 (Hidden Single)
- Naked Triple: 1,3,9 in r246c7 => r1c7<>3, r8c7<>1
- Locked Candidates Type 1 (Pointing): 1 in b9 => r6c8<>1
- Hidden Pair: 2,5 in r1c79 => r1c9<>3, r1c9<>7
- W-Wing: 7/3 in r1c8,r4c9 connected by 3 in r9c89 => r2c9,r6c8<>7
- Row 2 / Column 6 → 7 (Hidden Single)
- Row 1 / Column 6 → 4 (Full House)
- Row 4 / Column 9 → 7 (Hidden Single)
- Row 4 / Column 5 → 4 (Naked Single)
- Row 6 / Column 5 → 7 (Full House)
- Row 1 / Column 8 → 7 (Hidden Single)
- Row 1 / Column 1 → 3 (Hidden Single)
- Row 8 / Column 1 → 6 (Hidden Single)
- X-Wing: 1 r18 c34 => r246c3<>1
- 2-String Kite: 8 in r3c8,r8c3 (connected by r7c8,r8c9) => r3c3<>8
- W-Wing: 1/3 in r2c5,r9c8 connected by 3 in r3c58 => r9c5<>1
- Row 9 / Column 5 → 2 (Naked Single)
- Row 8 / Column 4 → 1 (Full House)
- Row 3 / Column 5 → 3 (Naked Single)
- Row 2 / Column 5 → 1 (Full House)
- Row 9 / Column 9 → 3 (Naked Single)
- Row 9 / Column 8 → 1 (Full House)
- Row 1 / Column 4 → 6 (Naked Single)
- Row 3 / Column 4 → 2 (Full House)
- Row 3 / Column 8 → 8 (Naked Single)
- Row 1 / Column 3 → 1 (Naked Single)
- Row 2 / Column 9 → 9 (Naked Single)
- Row 3 / Column 2 → 5 (Naked Single)
- Row 3 / Column 3 → 6 (Full House)
- Row 7 / Column 8 → 9 (Naked Single)
- Row 6 / Column 8 → 3 (Full House)
- Row 2 / Column 7 → 3 (Naked Single)
- Row 4 / Column 7 → 1 (Naked Single)
- Row 6 / Column 7 → 9 (Full House)
- Row 6 / Column 2 → 1 (Naked Single)
- Row 6 / Column 1 → 4 (Naked Single)
- Row 6 / Column 3 → 5 (Full House)
- Row 7 / Column 2 → 8 (Naked Single)
- Row 4 / Column 2 → 3 (Full House)
- Row 2 / Column 1 → 8 (Naked Single)
- Row 2 / Column 3 → 4 (Full House)
- Row 7 / Column 9 → 2 (Naked Single)
- Row 7 / Column 1 → 1 (Full House)
- Row 8 / Column 3 → 2 (Full House)
- Row 4 / Column 1 → 2 (Full House)
- Row 4 / Column 3 → 8 (Full House)
- Row 1 / Column 9 → 5 (Naked Single)
- Row 1 / Column 7 → 2 (Full House)
- Row 8 / Column 7 → 5 (Full House)
- Row 8 / Column 9 → 8 (Full House)
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