1
2
5
8
7
4
9
9
5
1
8
1
7
8
7
4
2
2
8
3
6
5
3
8
This Sudoku Puzzle has 69 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined, Uniqueness Test 3, Finned Swordfish, Bivalue Universal Grave + 1 techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 9 / Column 3 → 5 (Naked Single)
- Row 5 / Column 3 → 2 (Hidden Single)
- Row 8 / Column 8 → 2 (Hidden Single)
- Row 2 / Column 3 → 8 (Hidden Single)
- Row 1 / Column 7 → 8 (Hidden Single)
- Row 3 / Column 1 → 5 (Hidden Single)
- Row 4 / Column 2 → 7 (Hidden Single)
- Row 8 / Column 2 → 6 (Hidden Single)
- Row 7 / Column 3 → 3 (Naked Single)
- Row 3 / Column 3 → 6 (Naked Single)
- Row 1 / Column 3 → 7 (Full House)
- Row 2 / Column 9 → 5 (Hidden Single)
- Row 2 / Column 8 → 7 (Hidden Single)
- Row 5 / Column 4 → 7 (Hidden Single)
- Row 2 / Column 2 → 9 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 1 in b3 => r3c5<>1
- Locked Candidates Type 1 (Pointing): 6 in b3 => r1c5<>6
- Locked Candidates Type 1 (Pointing): 2 in b6 => r3c7<>2
- Locked Candidates Type 2 (Claiming): 3 in r2 => r1c56,r3c5<>3
- Locked Candidates Type 2 (Claiming): 1 in r8 => r7c56,r9c5<>1
- Locked Candidates Type 2 (Claiming): 9 in r8 => r7c56,r9c5<>9
- Locked Candidates Type 2 (Claiming): 4 in c4 => r4c56,r5c56,r6c56<>4
- 2-String Kite: 3 in r1c8,r6c2 (connected by r1c1,r3c2) => r6c8<>3
- Uniqueness Test 3: 1/9 in r7c19,r9c19 => r7c7<>6
- Locked Candidates Type 2 (Claiming): 6 in c7 => r46c8,r5c9<>6
- Finned Swordfish: 4 r159 c159 fr1c6 => r3c5<>4
- Row 3 / Column 5 → 2 (Naked Single)
- Row 3 / Column 9 → 1 (Naked Single)
- Row 3 / Column 7 → 3 (Naked Single)
- Row 3 / Column 2 → 4 (Full House)
- Row 1 / Column 1 → 3 (Full House)
- Row 6 / Column 2 → 3 (Full House)
- Row 1 / Column 8 → 6 (Naked Single)
- Row 1 / Column 9 → 2 (Full House)
- Row 7 / Column 8 → 4 (Naked Single)
- Row 6 / Column 8 → 5 (Naked Single)
- Row 4 / Column 8 → 3 (Full House)
- Row 7 / Column 6 → 5 (Naked Single)
- Row 9 / Column 9 → 9 (Naked Single)
- Row 7 / Column 5 → 7 (Naked Single)
- Row 5 / Column 9 → 4 (Naked Single)
- Row 7 / Column 9 → 6 (Full House)
- Row 9 / Column 1 → 1 (Naked Single)
- Row 7 / Column 1 → 9 (Full House)
- Row 7 / Column 7 → 1 (Full House)
- Row 9 / Column 7 → 7 (Full House)
- Row 9 / Column 5 → 4 (Full House)
- Row 1 / Column 5 → 9 (Naked Single)
- Row 1 / Column 6 → 4 (Full House)
- Row 6 / Column 5 → 6 (Naked Single)
- Row 5 / Column 5 → 3 (Naked Single)
- Row 2 / Column 5 → 1 (Naked Single)
- Row 4 / Column 5 → 5 (Full House)
- Row 2 / Column 4 → 6 (Naked Single)
- Row 2 / Column 6 → 3 (Full House)
- Bivalue Universal Grave + 1 => r6c6<>2, r6c6<>8
- Row 6 / Column 6 → 9 (Naked Single)
- Row 5 / Column 6 → 8 (Naked Single)
- Row 6 / Column 4 → 4 (Naked Single)
- Row 6 / Column 7 → 2 (Naked Single)
- Row 6 / Column 1 → 8 (Full House)
- Row 8 / Column 6 → 1 (Naked Single)
- Row 4 / Column 6 → 2 (Full House)
- Row 4 / Column 4 → 1 (Full House)
- Row 8 / Column 4 → 9 (Full House)
- Row 5 / Column 1 → 6 (Naked Single)
- Row 4 / Column 1 → 4 (Full House)
- Row 4 / Column 7 → 6 (Full House)
- Row 5 / Column 7 → 9 (Full House)
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