00:00
6
2
7
8
8
4
6
5
7
8
1
6
2
4
3
9
4
9
5
6
4
1
7
5
3
8
1
7
3
6
9
2025-07-10(Intermediate) Puzzles
Strategically plan number placement
Take your time if stuck and review candidates.
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.