00:00
1
2
3
4
7
6
4
1
5
7
9
8
3
7
3
9
1
1
8
3
7
2
4
2
9
7
5
8
6
7
9
2025-07-17(Intermediate) Puzzles
Slightly challenging but fun puzzles
Start with slightly harder squares to grasp the flow.
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.