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6
7
8
2
1
5
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3
5
7
4
1
3
9
7
3
6
4
4
1
5
2
6
8
6
2025-11-02(Advanced) Puzzles
Use full reasoning ability
Check candidates calmly for complex squares.
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.