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9
7
5
1
4
6
2
1
4
9
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6
1
9
7
8
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5
3
2
5
8
3
2
7
1
4
4
8
3
2025-06-16(Intermediate) Puzzles
Slightly challenging but fun puzzles
Read number patterns to identify efficient steps.
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.