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8
6
7
4
7
5
6
2
5
3
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7
1
8
3
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9
8
1
9
7
2
1
8
5
5
7
4
3
2025-06-20(Intermediate) Puzzles
Organize candidates while solving
Organize multiple candidates to avoid mistakes.
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.