00:00
6
9
5
6
2
3
9
4
3
5
6
2
7
4
3
8
6
1
7
5
3
8
9
3
5
5
2
7
6
4
9
2025-03-31(Intermediate) Puzzles
Combine logic to solve efficiently
Confirm each number gradually to understand the structure.
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.