00:00
6
3
4
7
5
3
1
7
1
9
7
3
1
9
2
1
9
1
7
8
1
6
7
8
8
5
3
6
5
9
2
2024-01-16(Intermediate) Puzzles
Challenge that requires careful thought
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.