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7
1
4
6
9
3
5
8
1
7
3
9
1
7
7
6
9
5
1
4
6
4
6
3
8
2
1
2
7
3
6
8
4
3
7
5
9
8
7
4
3
2025-09-02(Beginner) Puzzles
Puzzles to complete without hesitation
Double-check each number after placing it.
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.