00:00
2
7
8
9
4
7
5
8
6
8
2
1
2
5
3
3
9
2
5
7
1
6
4
5
3
9
1
6
6
5
7
2025-04-01(Intermediate) Puzzles
Think carefully for the best moves
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.