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7
3
5
2
3
7
6
1
3
7
7
6
4
8
2
1
1
8
2
6
5
4
9
8
2024-11-09(Advanced) Puzzles
High-level puzzles for focused solving
Organize candidates step by step to complete the puzzle.
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.