00:00
6
5
7
4
8
9
6
1
1
8
6
3
5
8
5
4
3
6
1
5
9
1
6
9
8
5
4
3
7
2
6
2025-08-29(Intermediate) Puzzles
Enjoy solving with thoughtful placement
Correct mistakes immediately if found.
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.