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7
8
3
5
6
5
4
3
9
7
4
2
3
8
3
7
1
5
7
2
6
9
5
6
7
8
7
6
4
1
9
2025-06-24(Intermediate) Puzzles
Consider number order and candidates
Postpone complex squares and start with easier numbers.
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.