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5
8
3
1
9
2
2
9
8
7
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8
5
1
8
7
6
3
2
7
3
1
3
9
7
4
3
6
5
9
1
2024-06-20(Intermediate) Puzzles
Apply logic to solve effectively
If stuck, review previous steps to find corrections.
Tips for Solving Sudoku
- Start with squares with fewer numbers: Begin with rows, columns, or blocks that already have more numbers filled; fewer candidates make it easier to solve.
- Pencil marks (notes): For beginners, write possible numbers in small font in empty squares for reference.
- Review: If stuck, check for duplicate numbers or rule violations.
- Basic rule: Do not repeat the same number in the same row, column, or 3x3 block.