00:00
5
3
3
8
5
4
9
6
9
5
1
1
6
2
8
7
8
5
4
4
7
9
2
6
7
2
9
3
5
1
4
2025-09-06(Intermediate) Puzzles
Puzzles to challenge logical thinking
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.