00:00
6
5
1
4
7
4
8
9
8
9
1
5
5
2
6
1
2
5
7
4
9
4
2
2
7
3
9
1
2
3
8
2025-07-02(Intermediate) Puzzles
Combine logic to solve efficiently
Compare candidates to find the best order.
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.