00:00
3
9
8
4
9
2
5
5
7
4
6
4
9
2
1
7
6
9
3
6
8
4
9
1
3
5
7
1
6
5
1
2025-11-28(Intermediate) Puzzles
Challenge that requires careful thought
Analyze row and column patterns for optimal steps.
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.