00:00
8
2
9
7
4
3
2
8
1
2
7
1
5
8
1
6
8
2
8
2
7
5
2
6
3
2025-10-21(Advanced) Puzzles
Puzzles requiring strategic planning
Evaluate multiple candidates simultaneously.
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.