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4
1
5
2
9
1
4
5
9
8
6
3
9
8
7
4
4
5
8
3
7
1
6
7
1
4
9
8
3
9
3
7
1
4
5
2
8
8
4
9
2
2024-07-06(Beginner) Puzzles
Check rules while placing numbers
Pay attention to obvious numbers that can be placed immediately.
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.