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
- Deselect: Press Escape or click another cell
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
- New Game: Start a fresh puzzle with selected difficulty
Difficulty
- Easy: Solvable using only naked singles (basic logic)
- Medium: Requires hidden singles (moderate logic)
- Hard: Requires naked pairs (advanced logic)