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4
7
6
8
6
4
3
9
2
4
7
6
4
5
1
3
1
2
5
8
4
3
2
9
2
5
6
9
1
6
8
2024-05-27(Intermediate) Puzzles
Puzzles suitable for logical challenges
Understand remaining numbers in rows and columns logically.
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.