00:00
4
7
9
5
5
8
7
2
1
5
6
7
5
8
4
7
1
1
2
6
4
9
7
5
1
5
2
3
6
4
8
2025-10-06(Intermediate) Puzzles
Enjoy reasoning while solving
Decide where to place numbers by viewing the board as a whole.
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.