00:00
3
4
8
9
4
8
7
1
8
9
6
4
2
7
2
1
4
8
9
1
5
3
5
8
1
4
9
3
2
5
3
2025-09-05(Intermediate) Puzzles
Enjoy reasoning while solving
Use notes to reduce hesitation.
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.