00:00
3
9
1
3
4
2
9
5
7
7
5
8
4
6
3
7
5
6
7
8
9
1
2
5
3
2025-01-19(Advanced) Puzzles
Think through number combinations
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.