00:00
6
3
4
6
5
3
1
7
8
5
9
4
6
2
8
1
7
5
7
9
4
3
5
9
6
1
8
7
4
5
9
2025-01-10(Intermediate) Puzzles
Apply logical thinking for number placement
Compare multiple candidates and place 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.