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4
9
6
1
5
1
4
3
2
6
7
6
1
8
2
9
5
7
2
1
4
8
9
4
8
3
9
5
2
7
5
2024-08-09(Intermediate) Puzzles
Develop reasoning skills with puzzles
Arrange numbers effectively to progress.
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.