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3
9
6
4
2
6
9
5
7
9
7
4
3
1
5
4
2
3
7
8
4
8
4
5
6
6
3
4
5
2
7
2024-02-05(Intermediate) Puzzles
Develop reasoning skills with puzzles
Confirm each number gradually to understand the structure.
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.