00:00
8
2
6
9
9
2
4
1
3
5
8
9
2
6
8
3
1
5
7
8
5
6
9
3
6
1
4
7
5
5
3
2025-09-21(Intermediate) Puzzles
Organize candidates while solving
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.