00:00
9
2
7
2
5
6
6
5
3
9
3
9
4
5
4
6
8
1
8
3
9
3
5
8
7
6
1
8
3
9
2
2025-09-28(Intermediate) Puzzles
Apply logic to solve effectively
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.