00:00
9
1
5
4
7
5
6
4
4
8
9
4
2
1
3
7
9
1
7
6
8
5
6
2
2025-08-13(Advanced) Puzzles
Strategic thinking for complex placements
Think strategically and solve difficult squares patiently.
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.