00:00
5
9
7
1
3
6
8
1
4
6
5
4
3
2
8
9
2
3
9
7
4
5
2
1
2025-04-18(Advanced) Puzzles
Puzzles requiring strategic planning
Look at the board to check placements carefully.
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.