00:00
5
2
9
9
7
3
1
7
2
5
8
9
1
7
3
8
5
3
9
1
4
5
2
2024-05-23(Advanced) Puzzles
High-difficulty fun for practice
Look at the board to check placements carefully.
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.