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8
6
6
7
5
1
4
3
2
1
9
3
7
5
8
4
4
2
1
7
5
5
9
1
5
8
2
1
9
4
7
2024-04-24(Intermediate) Puzzles
Combine logic to solve efficiently
Compare candidates and fill definite numbers first.
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.