00:00
3
7
2
5
6
8
2
4
7
5
3
9
8
6
5
1
4
9
6
8
5
1
3
9
2
1
2
7
6
5
4
2025-04-29(Intermediate) Puzzles
Analyze number patterns carefully
Organize candidates and solve step by step.
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.