00:00
5
1
8
7
9
1
7
4
8
2
1
4
9
5
3
8
6
4
9
8
2
8
2
6
5
7
3
1
7
6
5
2024-11-21(Intermediate) Puzzles
Challenge that requires careful thought
Solve less confusing parts first and follow 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.