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6
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8
This Sudoku Puzzle has 70 steps and it is solved using Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), Naked Triple, Naked Pair, undefined, Swordfish, Locked Pair, Full House techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 5 / Column 5 → 7 (Naked Single)
- Row 5 / Column 7 → 4 (Naked Single)
- Row 6 / Column 4 → 3 (Naked Single)
- Row 6 / Column 6 → 1 (Naked Single)
- Row 5 / Column 9 → 5 (Hidden Single)
- Row 1 / Column 3 → 4 (Hidden Single)
- Row 1 / Column 5 → 6 (Hidden Single)
- Row 1 / Column 7 → 7 (Hidden Single)
- Row 3 / Column 4 → 5 (Hidden Single)
- Row 8 / Column 8 → 5 (Hidden Single)
- Row 7 / Column 1 → 5 (Hidden Single)
- Row 1 / Column 2 → 5 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 9 in b5 => r4c12<>9
- Locked Candidates Type 1 (Pointing): 8 in b6 => r6c23<>8
- Naked Triple: 3,4,7 in r8c246 => r8c19<>3, r8c1<>7, r8c9<>4
- Row 9 / Column 9 → 4 (Hidden Single)
- Naked Triple: 2,3,7 in r468c2 => r2c2<>2, r29c2<>3, r29c2<>7
- Row 2 / Column 1 → 7 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 2 in b1 => r4c1<>2
- Naked Pair: 8,9 in r2c24 => r2c689<>8, r2c689<>9
- Naked Pair: 2,3 in r2c6,r3c5 => r1c6<>2, r1c6<>3
- Naked Triple: 3,8,9 in r357c3 => r9c3<>3, r9c3<>8, r9c3<>9
- X-Wing: 8 c24 r29 => r9c1<>8
- Swordfish: 3 c357 r379 => r3c19,r7c69,r9c1<>3
- Locked Candidates Type 1 (Pointing): 3 in b9 => r3c7<>3
- Swordfish: 9 r357 c139 => r1c19,r9c1<>9
- Locked Pair: 1,6 in r89c1 => r4c1,r9c3<>6
- Row 4 / Column 1 → 3 (Naked Single)
- Row 9 / Column 3 → 7 (Naked Single)
- Row 4 / Column 2 → 2 (Naked Single)
- Row 6 / Column 3 → 6 (Naked Single)
- Row 8 / Column 2 → 3 (Naked Single)
- Row 9 / Column 4 → 8 (Naked Single)
- Row 6 / Column 2 → 7 (Naked Single)
- Row 8 / Column 6 → 4 (Naked Single)
- Row 2 / Column 4 → 9 (Naked Single)
- Row 7 / Column 6 → 2 (Naked Single)
- Row 9 / Column 2 → 9 (Naked Single)
- Row 2 / Column 2 → 8 (Full House)
- Row 4 / Column 6 → 9 (Naked Single)
- Row 4 / Column 4 → 4 (Full House)
- Row 8 / Column 4 → 7 (Full House)
- Row 1 / Column 6 → 8 (Naked Single)
- Row 2 / Column 6 → 3 (Full House)
- Row 3 / Column 5 → 2 (Full House)
- Row 7 / Column 3 → 8 (Naked Single)
- Row 1 / Column 1 → 2 (Naked Single)
- Row 3 / Column 1 → 9 (Naked Single)
- Row 3 / Column 3 → 3 (Full House)
- Row 5 / Column 3 → 9 (Full House)
- Row 5 / Column 1 → 8 (Full House)
- Row 3 / Column 7 → 1 (Naked Single)
- Row 3 / Column 9 → 8 (Full House)
- Row 1 / Column 8 → 9 (Naked Single)
- Row 1 / Column 9 → 3 (Full House)
- Row 4 / Column 7 → 6 (Naked Single)
- Row 4 / Column 8 → 1 (Full House)
- Row 7 / Column 7 → 3 (Naked Single)
- Row 9 / Column 7 → 2 (Full House)
- Row 6 / Column 9 → 2 (Naked Single)
- Row 6 / Column 8 → 8 (Full House)
- Row 7 / Column 5 → 1 (Naked Single)
- Row 7 / Column 9 → 9 (Full House)
- Row 9 / Column 5 → 3 (Full House)
- Row 9 / Column 8 → 6 (Naked Single)
- Row 2 / Column 8 → 2 (Full House)
- Row 2 / Column 9 → 6 (Full House)
- Row 8 / Column 9 → 1 (Full House)
- Row 9 / Column 1 → 1 (Full House)
- Row 8 / Column 1 → 6 (Full House)
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