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3
8
6
9
3
2
2
1
2
4
7
8
2
6
7
1
6
2
1
9
3
4
7
1
4
3
2
6
3
5
7
2025-01-11(Intermediate) Puzzles
Develop reasoning skills with puzzles
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.