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6
1
9
4
5
7
5
4
8
7
9
1
8
4
3
2
4
1
5
9
3
9
6
8
1
7
7
6
9
4
5
2025-05-11(Intermediate) Puzzles
Solve step by step with reasoning
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.