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4
8
3
6
2
5
3
7
9
1
2
8
2
5
7
1
4
3
6
1
2
3
4
9
1
5
9
7
1
7
8
2024-03-29(Intermediate) Puzzles
Thoughtful Number Place for careful solving
Review candidates if stuck and reorganize.
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.