00:00
3
5
7
2
1
8
7
6
4
9
2
2
7
4
8
2
3
2
8
9
1
1
3
7
2025-07-08(Advanced) Puzzles
Test reasoning and strategy skills
Focus on logic without rushing.
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.