00:00
5
3
7
9
2
3
4
8
6
5
8
7
3
6
2
8
9
8
4
6
1
4
7
2025-11-01(Advanced) Puzzles
High-difficulty fun for practice
Consider order and possibilities while solving.
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.