00:00
7
9
2
5
1
8
4
8
7
6
3
8
1
4
1
2
1
9
2
5
3
1
5
4
2025-10-30(Advanced) Puzzles
Focused puzzles for careful solving
Use notes to manage candidates 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.