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7
2
5
5
3
6
1
6
2
3
4
6
7
3
1
2
5
7
6
4
2
8
1
9
6
4
2025-07-01(Advanced) Puzzles
Use full reasoning ability
Check overall balance and solve complex patterns.
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.