00:00
7
5
8
2
9
1
3
6
3
2
9
9
5
4
4
7
7
9
4
5
2
4
8
2024-09-13(Advanced) Puzzles
Puzzles requiring strategic planning
Compare candidate possibilities to advance 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.