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8
3
4
1
5
9
2
2
5
6
1
9
8
3
7
4
2
6
1
9
8
7
6
4
6
1
5
8
7
1
3
6
5
4
5
1
9
6
5
8
2
2025-10-02(Beginner) Puzzles
Solve by following number order
Double-check each number after placing it.
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.