00:00
2
4
8
7
7
4
8
2
5
6
6
8
9
3
1
5
1
2
6
4
8
7
4
7
1
9
2
6
8
4
1
2024-12-15(Intermediate) Puzzles
Challenge moderately difficult puzzles
Compare rows, columns, and blocks to logically narrow choices.
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.