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5
8
7
5
6
3
4
1
5
6
5
6
3
3
2
4
7
8
6
1
9
2
4
8
4
5
7
4
8
9
2
2024-10-01(Intermediate) Puzzles
Thoughtful Number Place for careful solving
Organize candidates and solve step by step.
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.