00:00
9
1
4
6
7
9
5
7
3
4
6
3
4
7
5
7
5
9
2
1
5
8
9
4
7
9
1
8
6
8
5
2024-04-29(Intermediate) Puzzles
Thoughtful Number Place for careful solving
Advance gradually toward completion.
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.