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8
2
4
1
5
6
8
7
2
7
1
5
9
5
8
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8
4
1
5
7
3
5
8
2
7
9
9
8
6
2
2024-08-11(Intermediate) Puzzles
Puzzles requiring strategic thinking
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.