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4
2
2
7
1
9
5
7
6
5
9
6
8
3
2
8
1
5
6
2
1
7
5
7
4
2024-05-24(Advanced) Puzzles
Use full reasoning ability
Follow steps to fill numbers efficiently without forcing.
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.