00:00
7
1
3
6
5
1
6
8
4
9
7
3
4
9
2
5
9
4
6
7
5
4
8
3
3
2
1
8
2
9
6
2024-03-18(Intermediate) Puzzles
Challenge that requires careful thought
Focus on logic to efficiently complete puzzles.
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.