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4
6
8
1
5
5
2
7
4
6
8
6
8
3
2
5
4
2
6
5
7
4
1
7
1
5
4
9
5
2
1
9
3
8
9
6
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7
1
6
5
2025-08-01(Beginner) Puzzles
Solve by following number order
Use elimination to reduce candidate 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.