00:00
3
8
1
6
5
6
6
4
2
5
3
9
8
6
1
4
2
4
2
9
3
1
2
7
3
9
4
3
9
4
6
2025-05-16(Intermediate) Puzzles
Slightly challenging but fun puzzles
If stuck, review previous steps to find corrections.
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.