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This Sudoku Puzzle has 67 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Naked Pair, Naked Triple, undefined, Turbot Fish techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 7 / Column 1 → 8 (Hidden Single)
- Row 9 / Column 7 → 8 (Hidden Single)
- Row 7 / Column 2 → 4 (Hidden Single)
- Row 1 / Column 9 → 4 (Hidden Single)
- Row 3 / Column 1 → 4 (Hidden Single)
- Row 1 / Column 8 → 5 (Hidden Single)
- Row 2 / Column 9 → 8 (Hidden Single)
- Row 2 / Column 1 → 9 (Hidden Single)
- Row 3 / Column 8 → 1 (Hidden Single)
- Row 3 / Column 2 → 7 (Naked Single)
- Row 1 / Column 2 → 1 (Naked Single)
- Row 2 / Column 3 → 6 (Full House)
- Row 1 / Column 4 → 7 (Naked Single)
- Row 2 / Column 5 → 1 (Naked Single)
- Row 2 / Column 4 → 2 (Naked Single)
- Row 2 / Column 7 → 7 (Full House)
- Row 1 / Column 5 → 6 (Hidden Single)
- Row 1 / Column 6 → 8 (Full House)
- Row 5 / Column 5 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 1 in b5 => r4c13<>1
- Locked Candidates Type 1 (Pointing): 1 in b7 => r8c6<>1
- Naked Pair: 3,9 in r39c4 => r45c4<>3, r5c4<>9
- Naked Triple: 2,5,6 in r378c7 => r4c7<>2, r46c7<>5, r4c7<>6
- Locked Candidates Type 1 (Pointing): 5 in b6 => r8c9<>5
- X-Wing: 2 c28 r59 => r5c39,r9c3<>2
- Row 9 / Column 3 → 7 (Naked Single)
- Naked Pair: 4,5 in r5c34 => r5c69<>5
- Naked Triple: 3,7,9 in r46c5,r5c6 => r4c6<>3, r4c6<>7
- Turbot Fish: 9 r6c5 =9= r8c5 -9- r8c9 =9= r9c8 => r6c8<>9
- Row 6 / Column 8 → 7 (Naked Single)
- Row 7 / Column 8 → 6 (Naked Single)
- Row 7 / Column 7 → 5 (Naked Single)
- Row 7 / Column 4 → 1 (Naked Single)
- Row 7 / Column 6 → 7 (Full House)
- Row 8 / Column 7 → 2 (Naked Single)
- Row 3 / Column 7 → 6 (Naked Single)
- Row 3 / Column 9 → 2 (Full House)
- Row 8 / Column 3 → 1 (Naked Single)
- Row 9 / Column 8 → 9 (Naked Single)
- Row 5 / Column 8 → 2 (Full House)
- Row 8 / Column 9 → 7 (Full House)
- Row 8 / Column 1 → 3 (Naked Single)
- Row 9 / Column 2 → 2 (Full House)
- Row 5 / Column 2 → 3 (Full House)
- Row 9 / Column 4 → 3 (Naked Single)
- Row 9 / Column 6 → 6 (Full House)
- Row 6 / Column 1 → 1 (Naked Single)
- Row 8 / Column 5 → 9 (Naked Single)
- Row 8 / Column 6 → 5 (Full House)
- Row 5 / Column 6 → 9 (Naked Single)
- Row 3 / Column 4 → 9 (Naked Single)
- Row 3 / Column 6 → 3 (Full House)
- Row 4 / Column 6 → 1 (Full House)
- Row 6 / Column 5 → 3 (Naked Single)
- Row 4 / Column 5 → 7 (Full House)
- Row 5 / Column 9 → 6 (Naked Single)
- Row 6 / Column 7 → 4 (Naked Single)
- Row 4 / Column 7 → 3 (Full House)
- Row 4 / Column 1 → 6 (Naked Single)
- Row 5 / Column 1 → 7 (Full House)
- Row 4 / Column 9 → 5 (Naked Single)
- Row 6 / Column 9 → 9 (Full House)
- Row 6 / Column 3 → 5 (Full House)
- Row 4 / Column 4 → 4 (Naked Single)
- Row 4 / Column 3 → 2 (Full House)
- Row 5 / Column 3 → 4 (Full House)
- Row 5 / Column 4 → 5 (Full House)
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