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8
6
4
6
5
9
2
1
7
4
2
9
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6
5
1
8
5
3
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5
9
5
3
2
6
8
6
8
1
4
2025-09-19(Intermediate) Puzzles
Read number patterns logically
Understand remaining numbers in rows and columns logically.
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.