00:00
6
5
4
5
8
4
3
1
8
7
5
9
4
1
4
5
1
2
7
4
3
9
8
5
5
6
4
3
6
4
9
2025-02-02(Intermediate) Puzzles
Thoughtful Number Place for careful solving
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.