00:00
4
9
6
7
3
3
8
2
1
7
5
9
2
6
1
2
4
8
3
6
4
3
6
9
2025-06-21(Advanced) Puzzles
Decode challenging placements
Review previous steps if stuck and correct logically.
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.