00:00
2
5
7
8
5
1
4
8
3
2
7
1
8
4
2
1
7
8
9
3
3
2
1
9
7
8
3
2
5
1
7
2025-01-27(Intermediate) Puzzles
Moderately challenging puzzles
Compare candidates to narrow options efficiently.
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.