00:00
6
1
5
8
1
3
5
2
8
4
9
6
7
2
3
8
9
2
7
3
9
3
6
2024-08-21(Advanced) Puzzles
Challenging and thoughtful puzzles
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.