00:00
4
6
9
8
3
5
7
6
3
1
5
7
4
2
6
7
3
8
1
1
9
3
6
3
2
2024-08-04(Advanced) Puzzles
Difficult number placement puzzles
Follow steps to gradually complete difficult puzzles.
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.