Solution for Hard Sudoku #3361253784998
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4
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This Sudoku Puzzle has 63 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined, Turbot Fish techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 6 / Column 9 → 5 (Naked Single)
- Row 6 / Column 8 → 6 (Naked Single)
- Row 6 / Column 4 → 3 (Naked Single)
- Row 6 / Column 7 → 2 (Naked Single)
- Row 6 / Column 3 → 4 (Full House)
- Row 5 / Column 6 → 4 (Hidden Single)
- Row 7 / Column 4 → 6 (Hidden Single)
- Row 8 / Column 2 → 9 (Hidden Single)
- Row 5 / Column 5 → 6 (Hidden Single)
- Row 1 / Column 7 → 6 (Hidden Single)
- Row 4 / Column 3 → 6 (Hidden Single)
- Row 3 / Column 7 → 3 (Hidden Single)
- Row 1 / Column 2 → 4 (Hidden Single)
- Row 9 / Column 1 → 4 (Hidden Single)
- Row 3 / Column 9 → 4 (Hidden Single)
- Row 8 / Column 7 → 4 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 9 in b2 => r1c8<>9
- Locked Candidates Type 1 (Pointing): 5 in b7 => r5c3<>5
- Locked Candidates Type 1 (Pointing): 7 in b9 => r9c23<>7
- Locked Candidates Type 2 (Claiming): 1 in r7 => r89c3,r9c2<>1
- 2-String Kite: 8 in r4c7,r9c4 (connected by r4c6,r5c4) => r9c7<>8
- Turbot Fish: 8 r5c4 =8= r9c4 -8- r9c8 =8= r8c9 => r5c9<>8
- XY-Wing: 1/8/7 in r18c9,r9c7 => r2c7<>7
- XY-Wing: 5/7/8 in r4c16,r7c1 => r7c6<>8
- Row 7 / Column 6 → 2 (Naked Single)
- Row 1 / Column 5 → 2 (Hidden Single)
- Row 1 / Column 3 → 3 (Hidden Single)
- Row 2 / Column 5 → 3 (Hidden Single)
- Row 5 / Column 1 → 3 (Hidden Single)
- Row 9 / Column 2 → 3 (Hidden Single)
- Row 3 / Column 4 → 1 (Hidden Single)
- Row 5 / Column 4 → 5 (Hidden Single)
- Row 4 / Column 6 → 8 (Full House)
- Row 1 / Column 4 → 9 (Naked Single)
- Row 9 / Column 4 → 8 (Full House)
- Row 4 / Column 1 → 5 (Hidden Single)
- Row 9 / Column 3 → 2 (Hidden Single)
- Row 5 / Column 2 → 2 (Hidden Single)
- Row 9 / Column 6 → 9 (Hidden Single)
- Row 8 / Column 9 → 8 (Hidden Single)
- Row 1 / Column 9 → 7 (Naked Single)
- Row 5 / Column 9 → 1 (Full House)
- Row 8 / Column 3 → 5 (Naked Single)
- Row 8 / Column 5 → 1 (Full House)
- Row 9 / Column 5 → 5 (Full House)
- Row 1 / Column 6 → 5 (Naked Single)
- Row 1 / Column 8 → 8 (Full House)
- Row 3 / Column 6 → 7 (Full House)
- Row 3 / Column 8 → 5 (Full House)
- Row 4 / Column 7 → 7 (Naked Single)
- Row 4 / Column 2 → 1 (Full House)
- Row 5 / Column 3 → 7 (Full House)
- Row 7 / Column 2 → 7 (Full House)
- Row 5 / Column 8 → 9 (Naked Single)
- Row 5 / Column 7 → 8 (Full House)
- Row 9 / Column 7 → 1 (Naked Single)
- Row 2 / Column 7 → 9 (Full House)
- Row 2 / Column 8 → 1 (Full House)
- Row 9 / Column 8 → 7 (Full House)
- Row 2 / Column 3 → 8 (Naked Single)
- Row 2 / Column 1 → 7 (Full House)
- Row 7 / Column 1 → 8 (Full House)
- Row 7 / Column 3 → 1 (Full House)
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