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8
2
1
7
5
9
6
7
8
3
7
6
9
3
2
9
2
5
1
5
6
9
3
3
2
8
5
7
4
1
8
2025-03-08(Intermediate) Puzzles
Strategically plan number placement
Read complex patterns and advance logically.
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.