00:00
8
9
3
4
5
9
2
5
8
9
8
6
4
1
5
7
3
5
6
7
2
4
9
2024-11-22(Advanced) Puzzles
Challenging and thoughtful puzzles
Consider number combinations to proceed optimally.
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.