00:00
3
8
1
5
9
2
8
4
6
3
1
8
7
9
3
2
1
3
7
5
6
4
5
9
1
1
5
2
9
2
3
2024-08-31(Intermediate) Puzzles
Thoughtful Number Place for careful solving
Look at the whole board to decide where to proceed.
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.