00:00
9
1
6
4
3
7
8
6
1
2
5
8
7
2
9
1
3
8
9
1
1
3
2
7
4
2024-05-20(Advanced) Puzzles
Challenging and thoughtful puzzles
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.