00:00
7
1
4
3
9
1
6
3
5
6
9
7
5
6
1
8
7
1
2
9
4
5
3
9
8
6
2025-03-15(Advanced) Puzzles
Use full logic for complex solving
Consider multiple candidates simultaneously to find optimal placement.
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.