00:00
8
3
2
5
2
6
5
4
6
1
5
4
3
9
6
9
3
2
7
8
1
2
8
7
9
2025-02-26(Advanced) Puzzles
High-difficulty fun for practice
Compare candidates and proceed in the most efficient order.
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.