00:00
2
5
7
1
5
6
2
1
9
5
8
4
6
9
7
1
2
4
6
7
1
3
8
2
4
5
7
6
2
5
3
2024-02-15(Intermediate) Puzzles
Standard difficulty puzzles
Compare multiple candidates and place definite numbers first.
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.