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2
5
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9
1
5
9
4
7
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7
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5
3
1
7
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6
5
9
4
2
7
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7
6
3
1
2
6
2025-08-31(Intermediate) Puzzles
Analyze number patterns carefully
Compare candidates to find the best order.
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.