00:00
9
2
1
1
7
5
2
8
6
7
3
9
5
8
6
3
4
3
4
9
2
1
8
7
6
4
3
9
2
9
5
2025-04-28(Intermediate) Puzzles
Judge placement strategically
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.