00:00
7
4
8
2
2
8
9
4
7
2
1
6
1
9
4
6
8
7
8
3
9
5
9
3
4
7
5
1
9
8
4
8
2
5
1
7
9
7
3
4
6
2025-07-13(Beginner) Puzzles
Check rules while placing numbers
Check rows, columns, and 3x3 blocks to avoid duplicates.
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.