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3
5
4
8
2
6
5
1
3
7
3
4
4
7
1
4
3
2
5
2
4
3
4
9
8
1
9
5
1
3
6
2024-03-19(Intermediate) Puzzles
Apply logic to solve effectively
For squares with multiple candidates, consider order and priority.
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.