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6
6
2
5
7
1
8
2
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7
3
1
5
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9
8
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9
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1
5
9
7
1
8
2025-06-09(Advanced) Puzzles
Train your brain with challenging patterns
Analyze complex patterns and place numbers efficiently.
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.