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5
6
7
5
1
6
7
8
4
5
3
1
6
7
7
4
9
2
2
3
1
6
5
2
9
2
5
4
8
5
7
2024-02-13(Intermediate) Puzzles
Use reasoning in number puzzles
Use notes to reduce hesitation.
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.