00:00
2
3
4
9
1
8
5
6
2
4
2
3
5
4
6
3
5
7
5
2
3
9
3
4
2
7
5
7
3
4
1
2024-03-15(Intermediate) Puzzles
Use reasoning in number puzzles
Decide where to place numbers by viewing the board as a whole.
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.