00:00
8
1
3
7
5
3
1
7
4
2
8
1
4
1
5
7
6
1
9
7
7
9
2
8
5
4
9
6
1
2
7
2025-05-24(Intermediate) Puzzles
Consider number order and candidates
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.