Brain Training⭐
Mini Sudoku
⏱ 3 minPlay ▶
About Sudoku Classic
Fill the 9x9 grid with numbers 1-9. This free online game is part of our brain training collection and is designed for players of all ages.
- Difficulty: medium
- Average play time: 8 minutes
- No download or signup required
- Works on desktop and mobile devices
🎮 How to Play Sudoku
Sudoku is a logic-based number puzzle played on a 9×9 grid. The grid is divided into nine 3×3 boxes. Some cells are pre-filled with numbers (1-9), and your goal is to fill in the remaining cells.
- Rule 1: Each row must contain the numbers 1-9, with no repetition.
- Rule 2: Each column must contain the numbers 1-9, with no repetition.
- Rule 3: Each 3×3 box must contain the numbers 1-9, with no repetition.
Start by looking for cells where only one number is possible. As you fill in more numbers, the solution becomes clearer.
💡 Winning Strategies
- Scanning (Cross-Hatching): Look at a row or column and identify which numbers are missing. Then check the 3×3 box to see where those numbers can fit.
- Naked Singles: A cell where only one number is possible because all other numbers exist in its row, column, or box.
- Hidden Singles: A number that can only go in one specific cell within a row, column, or box, even if other numbers are possible in that cell.
- Pencil Marks: Write small candidate numbers in corners of cells to track possibilities. This helps spot patterns like pairs and triplets.
🧠 Brain Benefits
Sudoku is more than just a game—it's a workout for your brain! Studies show that regular puzzle-solving can improve concentration, memory, and logical reasoning. It's particularly beneficial for seniors looking to maintain cognitive health and for students developing problem-solving skills.