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6
1
8
9
7
5
1
2
8
2
6
4
9
2
7
4
1
1
4
2
8
7
3
5
6
1
4
2
9
9
8
6
4
6
2
9
2
1
8
7
3
2025-05-15(Beginner) Puzzles
Step-by-step approach to solving
Use pencil marks to track possible candidates.
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.