00:00
2
9
3
5
4
6
1
9
3
5
4
8
5
7
1
6
2
7
8
1
7
3
5
2025-09-16(Advanced) Puzzles
Consider multiple candidates simultaneously
Follow steps to fill numbers efficiently without forcing.
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.