00:00
9
6
7
9
3
8
4
1
2
7
6
9
7
5
4
8
6
4
3
1
5
5
4
6
7
1
3
2
7
5
9
2024-10-26(Intermediate) Puzzles
Moderately challenging puzzles
Advance gradually toward completion.
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.