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2
9
1
9
4
8
1
5
3
5
7
3
7
9
2
4
1
6
8
2
4
2
6
8
3
5
2
1
3
6
9
2025-11-24(Intermediate) Puzzles
Logical puzzles for steady progress
Look at the whole board to decide where to proceed.
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.