00:00
4
8
5
2
9
5
2
3
8
5
4
6
8
7
3
1
2
7
6
8
4
1
6
2
4
2025-05-15(Advanced) Puzzles
Consider multiple candidates simultaneously
Think strategically and solve difficult squares patiently.
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.