Sudoku is a number puzzle where every row, column, and 3x3 box must contain the digits 1 through 9. A clean solve comes from logic, not guessing.
Start with certain placements and scan for cells where only one value can fit. If you get stuck, examine one digit across the whole grid instead of jumping randomly between cells.
You Win!
Final Score: 0
Time: 00:00
How to Play
Goal
Fill the 9x9 grid with numbers 1-9 so that each row, each column, and each of the nine 3x3 boxes contains all the digits from 1 to 9.
How to Win
You win when the entire grid is correctly filled without any conflicts! Your time is recorded when you complete the puzzle.
How to Play
Timer: The timer starts when you select your first cell
Select a cell: Click or tap on any empty cell
Enter a number: Use the number pad at the bottom or press keys 1-9
Erase: Select a filled cell and press the eraser button or Delete/Backspace
Sudoku Rules
Row Rule: Each row must contain the numbers 1-9 exactly once
Column Rule: Each column must contain the numbers 1-9 exactly once
Box Rule: Each 3x3 box must contain the numbers 1-9 exactly once
Options
Hints: Toggle to highlight incorrect numbers in red