00:00
5
9
6
1
4
5
6
6
1
2
3
6
4
2
8
9
7
9
7
1
1
7
7
3
9
6
6
9
5
2
8
2025-06-23(Intermediate) Puzzles
Use reasoning in number puzzles
Advance gradually toward completion.
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.