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3
2
6
2
6
1
5
9
8
9
1
9
7
2
5
2
3
3
6
9
9
5
1
8
9
6
3
7
9
3
1
2024-07-21(Intermediate) Puzzles
Apply logic to solve effectively
Read number patterns to identify efficient steps.
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.