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1
This Sudoku Puzzle has 53 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Uniqueness Test 1, Give Up techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 7 / Column 5 → 4 (Hidden Single)
- Row 9 / Column 1 → 4 (Hidden Single)
- Row 6 / Column 6 → 9 (Hidden Single)
- Row 8 / Column 4 → 7 (Hidden Single)
- Row 9 / Column 7 → 6 (Hidden Single)
- Row 9 / Column 5 → 2 (Naked Single)
- Row 9 / Column 6 → 8 (Naked Single)
- Row 9 / Column 2 → 7 (Naked Single)
- Row 9 / Column 3 → 3 (Full House)
- Row 2 / Column 6 → 4 (Hidden Single)
- Row 6 / Column 4 → 4 (Hidden Single)
- Row 2 / Column 4 → 2 (Hidden Single)
- Row 3 / Column 1 → 7 (Hidden Single)
- Row 4 / Column 3 → 7 (Hidden Single)
- Row 3 / Column 7 → 2 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 1 in b5 => r4c18<>1
- Locked Candidates Type 1 (Pointing): 1 in b8 => r8c123<>1
- Locked Candidates Type 2 (Claiming): 1 in c1 => r5c23,r6c2<>1
- Row 6 / Column 2 → 5 (Naked Single)
- Row 6 / Column 9 → 7 (Naked Single)
- Row 2 / Column 9 → 6 (Naked Single)
- Row 7 / Column 9 → 2 (Naked Single)
- Row 4 / Column 9 → 8 (Naked Single)
- Row 8 / Column 8 → 9 (Naked Single)
- Row 7 / Column 8 → 7 (Full House)
- Row 4 / Column 1 → 3 (Naked Single)
- Row 8 / Column 1 → 8 (Naked Single)
- Row 8 / Column 3 → 5 (Naked Single)
- Row 4 / Column 8 → 2 (Naked Single)
- Row 6 / Column 1 → 1 (Naked Single)
- Row 5 / Column 1 → 9 (Full House)
- Row 6 / Column 7 → 3 (Full House)
- Row 8 / Column 2 → 2 (Naked Single)
- Row 5 / Column 3 → 6 (Naked Single)
- Row 5 / Column 2 → 8 (Full House)
- Row 2 / Column 7 → 7 (Hidden Single)
- Row 1 / Column 8 → 8 (Hidden Single)
- Row 3 / Column 2 → 6 (Hidden Single)
- Row 1 / Column 9 → 4 (Hidden Single)
- Row 5 / Column 9 → 5 (Full House)
- Row 5 / Column 7 → 1 (Naked Single)
- Row 1 / Column 7 → 5 (Full House)
- Row 5 / Column 8 → 4 (Full House)
- Uniqueness Test 1: 1/3 in r2c58,r3c58 => r2c5<>1, r2c5<>3
- Row 2 / Column 5 → 9 (Naked Single)
- Row 2 / Column 2 → 1 (Naked Single)
- Row 1 / Column 3 → 9 (Full House)
- Row 2 / Column 8 → 3 (Full House)
- Row 7 / Column 2 → 9 (Full House)
- Row 7 / Column 3 → 1 (Full House)
- Row 3 / Column 8 → 1 (Full House)
- Row 3 / Column 5 → 3 (Full House)
- Give Up: Don't know how to proceed!
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