00:00
3
7
4
9
3
7
1
8
5
2
1
8
4
9
9
6
3
8
5
7
3
1
8
5
2
1
8
4
8
6
3
2025-08-14(Intermediate) Puzzles
Consider multiple candidates while solving
If stuck, review previous steps to find corrections.
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.