Online Sudoku

How to Play Sudoku

Sudoku is a classic logic-based puzzle game played on a 9x9 grid, divided into nine 3x3 subgrids.

🎯 Objective

Fill the grid so that every row, column, and 3x3 box contains the digits 1 through 9 without repetition.

🎮 Controls

1. Select: Click any cell to select it.
2. Input: Use the number pad or your keyboard (1-9).
3. Erase: Click the same number again to remove it, or use the "Erase" button.

📝 Key Feature: Notes Mode

Don't guess! Use notes to track candidates.

• Toggle ON: Click the "Notes" button.
• Mark Candidates: Enter numbers to add them as small notes in the cell. You can mark multiple numbers (e.g., 1, 5, 9).
• Toggle OFF: When you are sure of the answer, turn Notes OFF and enter the final number.

🧠 Benefits of Sudoku

• Logic Skills: Improves logical thinking and problem-solving skills.
• Memory: Enhances short-term memory and concentration.
• Brain Health: Keeps your brain active and may reduce the risk of cognitive decline.
• Stress Relief: Focusing on logic helps calm the mind and reduce anxiety.