00:00
6
7
6
3
5
4
8
7
4
3
6
7
1
8
2
8
9
7
3
3
8
2
3
1
8
2
7
9
9
5
2
2024-12-31(Intermediate) Puzzles
Enjoy reasoning while solving
Confirm each number gradually to understand the structure.
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.