00:00
1
8
2
4
9
3
8
5
4
2
1
9
5
9
8
3
4
7
1
9
6
2
4
6
9
8
3
5
7
2
4
2025-09-01(Intermediate) Puzzles
Moderately challenging puzzles
Proceed logically without rushing.
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.