00:00
3
8
6
1
3
1
6
7
8
6
2
5
3
5
7
3
8
2
3
1
5
9
8
2
7
4
3
3
9
8
6
2025-02-22(Intermediate) Puzzles
Challenge that requires careful thought
Review candidates if stuck and reorganize.
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.