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2
1
9
8
5
3
4
1
6
7
9
5
2
3
3
6
7
5
9
2
1
7
6
8
6
7
8
5
2
1
6
8
9
7
8
2
8
6
4
1
7
2024-01-21(Beginner) Puzzles
Solve by following number order
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.