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1
7
9
6
1
4
4
5
9
6
2
3
6
2
8
8
5
9
1
4
3
7
2
8
5
3
2
1
9
4
3
2025-10-13(Intermediate) Puzzles
Solve step by step with reasoning
If stuck, review previous steps to find corrections.
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.