Click a cell, then press number keys (1-9) or delete.
📖 How to Play Sudoku
🧩
Row
Each row must contain numbers 1-9 without repetition.
123456789
📐
Column
Each column must contain numbers 1-9 without repetition.
147258369
🔲
3x3 Box
Each 3x3 region must contain numbers 1-9 exactly once.
1
2
3
4
5
6
7
8
9
💡 Click a cell → type number or use the number pad. Press Undo to revert last move. Errors are counted and accompanied by a buzzer sound.
✨ What is Sudoku?
Sudoku is a number placement puzzle that requires no arithmetic or special math skills — just pure logic and concentration. It's a fun way to keep your mind sharp and improve focus.
🌟 Sudoku Tips
Look for rows, columns, or boxes that already contain 5 or more numbers. Try the missing numbers in the empty cells – often only one number fits based on existing numbers.
Visually divide the grid into 3 large columns and 3 large rows. Each large column contains three 3x3 boxes. Search for two identical numbers in a column or box; the third must appear in the remaining nine-cell block.
Use the "Check" button to verify your entries without finishing the puzzle. Use "Hint" to reveal the correct number for the selected cell.