00:00
3
5
9
2
8
7
2
6
8
1
9
4
7
2
6
6
2
8
5
6
7
5
9
3
2024-12-17(Advanced) Puzzles
Decode challenging placements
Compare possibilities and choose efficiently.
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.