00:00
9
3
8
6
6
4
8
7
9
7
3
5
6
1
5
8
7
6
4
3
3
1
6
7
2
2
5
5
6
2
9
2025-10-08(Intermediate) Puzzles
Thoughtful Number Place for careful solving
Take your time if stuck and review candidates.
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.