00:00
5
3
6
9
8
9
1
3
2
4
8
1
1
9
8
3
5
2
4
3
4
9
2
3
7
3
4
9
4
8
1
2025-07-16(Intermediate) Puzzles
Develop reasoning skills with puzzles
Read number patterns to identify efficient steps.
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.