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7
5
4
6
3
9
1
7
4
1
3
6
8
5
2
6
3
4
6
3
9
1
8
5
2
6
2
4
1
7
7
5
2
3
9
4
4
7
8
5
6
2024-03-07(Beginner) Puzzles
Step-by-step approach to solving
If stuck, move to other parts and return later.
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.