00:00
2
1
5
1
4
3
2
9
5
8
7
6
7
5
6
4
3
1
6
5
6
5
4
2
3
7
5
7
3
8
6
2025-06-30(Intermediate) Puzzles
Analyze number patterns carefully
Correct mistakes immediately if found.
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.