00:00
7
5
8
6
2
6
1
9
2
7
4
5
7
1
3
6
1
4
2
8
9
4
7
9
2025-05-21(Advanced) Puzzles
Decode challenging placements
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.