00:00
7
4
3
5
9
1
2
3
5
4
1
6
8
7
9
2
1
4
4
7
1
5
3
7
2025-08-17(Advanced) Puzzles
Use full logic for complex solving
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.