00:00
1
8
7
5
3
6
5
7
9
5
7
8
2
3
6
6
2
1
1
9
6
4
5
8
2025-09-09(Advanced) Puzzles
Logical thinking required for tough puzzles
Think strategically to solve puzzles steadily.
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.