00:00
4
3
2
5
9
5
1
2
2
4
1
5
4
1
2
8
9
2
8
4
6
3
8
1
7
6
5
2
1
4
8
2025-01-01(Intermediate) Puzzles
Puzzles to challenge logical thinking
Correct mistakes immediately if found.
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.