00:00
3
9
6
7
3
4
1
4
3
1
7
5
6
5
1
6
1
7
4
7
2
3
5
8
2024-06-23(Advanced) Puzzles
High-difficulty fun for practice
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.