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4
1
7
6
9
7
6
1
8
1
8
7
9
2
5
4
5
8
7
9
2
2
6
8
3
9
6
1
5
7
6
4
2
6
1
3
3
9
7
6
5
2024-06-05(Beginner) Puzzles
Check rules while placing numbers
If stuck, move to other parts and return later.
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.