00:00
6
4
5
1
4
7
3
7
5
5
4
8
3
7
4
2
8
3
7
9
3
2
4
2
8
2025-07-17(Advanced) Puzzles
Use full logic for complex solving
Look at the board to check placements carefully.
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.