00:00
5
6
1
5
8
2
3
7
3
7
1
4
2
6
7
3
1
8
2
6
8
2
5
9
3
4
6
1
9
1
3
2025-05-03(Intermediate) Puzzles
Puzzles suitable for logical challenges
Compare candidates to find the best order.
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.