00:00
2
8
6
4
2
5
9
5
9
2
8
3
2
5
2
6
1
9
4
7
3
6
5
4
1
4
1
5
3
6
8
2025-11-27(Intermediate) Puzzles
Standard difficulty puzzles
Correct mistakes immediately if found.
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.