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This Sudoku Puzzle has 70 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Single, Locked Pair, Full House, Naked Pair, Remote Pair techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 4 / Column 3 → 4 (Hidden Single)
- Row 7 / Column 9 → 5 (Hidden Single)
- Row 8 / Column 5 → 4 (Hidden Single)
- Row 9 / Column 8 → 8 (Hidden Single)
- Row 6 / Column 7 → 3 (Hidden Single)
- Row 9 / Column 4 → 6 (Hidden Single)
- Row 1 / Column 9 → 4 (Hidden Single)
- Row 4 / Column 5 → 6 (Hidden Single)
- Row 9 / Column 2 → 4 (Hidden Single)
- Row 7 / Column 8 → 4 (Hidden Single)
- Row 4 / Column 4 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 5 in b5 => r5c3<>5
- Locked Candidates Type 1 (Pointing): 9 in b6 => r4c1<>9
- Locked Candidates Type 1 (Pointing): 9 in b8 => r13c6<>9
- Locked Candidates Type 2 (Claiming): 3 in r2 => r1c3<>3
- Locked Candidates Type 2 (Claiming): 9 in c1 => r78c2,r89c3<>9
- Row 9 / Column 3 → 1 (Naked Single)
- Locked Pair: 2,7 in r78c2 => r56c2,r8c3<>2, r56c2,r89c1<>7
- Row 9 / Column 1 → 9 (Naked Single)
- Row 9 / Column 6 → 7 (Full House)
- Row 7 / Column 6 → 9 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 1 in b8 => r135c4<>1
- Locked Candidates Type 1 (Pointing): 2 in b8 => r35c4<>2
- Row 3 / Column 4 → 3 (Naked Single)
- Row 1 / Column 8 → 3 (Hidden Single)
- Row 5 / Column 6 → 3 (Hidden Single)
- Row 5 / Column 4 → 5 (Hidden Single)
- Row 1 / Column 4 → 7 (Naked Single)
- Row 1 / Column 6 → 5 (Hidden Single)
- Naked Pair: 1,7 in r7c7,r8c8 => r8c79<>1, r8c79<>7
- Naked Pair: 1,2 in r3c68 => r3c259<>1, r3c59<>2
- Row 3 / Column 9 → 6 (Naked Single)
- Row 8 / Column 9 → 9 (Naked Single)
- Row 8 / Column 7 → 6 (Naked Single)
- Row 1 / Column 2 → 6 (Hidden Single)
- Row 4 / Column 7 → 9 (Hidden Single)
- Row 2 / Column 1 → 1 (Hidden Single)
- Row 4 / Column 1 → 7 (Naked Single)
- Row 6 / Column 1 → 5 (Naked Single)
- Row 8 / Column 1 → 3 (Full House)
- Row 8 / Column 3 → 5 (Naked Single)
- Row 2 / Column 3 → 3 (Hidden Single)
- Locked Candidates Type 2 (Claiming): 1 in c9 => r5c8<>1
- Remote Pair: 2/1 r3c8 -1- r3c6 -2- r4c6 -1- r4c9 => r2c9,r5c8<>2
- Row 2 / Column 9 → 7 (Naked Single)
- Row 5 / Column 8 → 7 (Naked Single)
- Row 2 / Column 7 → 8 (Naked Single)
- Row 2 / Column 5 → 2 (Full House)
- Row 8 / Column 8 → 1 (Naked Single)
- Row 3 / Column 8 → 2 (Full House)
- Row 1 / Column 7 → 1 (Full House)
- Row 7 / Column 7 → 7 (Full House)
- Row 3 / Column 6 → 1 (Naked Single)
- Row 4 / Column 6 → 2 (Full House)
- Row 4 / Column 9 → 1 (Full House)
- Row 6 / Column 9 → 2 (Full House)
- Row 5 / Column 5 → 1 (Naked Single)
- Row 6 / Column 5 → 7 (Full House)
- Row 8 / Column 4 → 2 (Naked Single)
- Row 7 / Column 4 → 1 (Full House)
- Row 7 / Column 2 → 2 (Full House)
- Row 8 / Column 2 → 7 (Full House)
- Row 6 / Column 3 → 8 (Naked Single)
- Row 6 / Column 2 → 1 (Full House)
- Row 5 / Column 2 → 9 (Naked Single)
- Row 3 / Column 2 → 8 (Full House)
- Row 1 / Column 3 → 9 (Full House)
- Row 5 / Column 3 → 2 (Full House)
- Row 3 / Column 5 → 9 (Full House)
- Row 1 / Column 5 → 8 (Full House)
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