Online SudokuPlay Online Sudoku for free. Challenge your brain with the classic logic puzzle by filling the 9x9 grid with numbers 1 to 9 without any repeats.
Online Sudoku
Online Sudoku brings the classic newspaper logic puzzle straight to your screen. The goal remains the same: fill the 9×9 grid so that every row, column, and 3×3 box contains the numbers 1 through 9 exactly once, without any repeats.
It’s a calm but mentally engaging experience that rewards patience and careful deduction. You can play at your own pace, slowly narrowing down the possibilities for each empty cell until the entire board clicks into place.
Controls
- Mouse or Touch: Select a cell to highlight it, then choose a number to fill it in.
- Keyboard: Use the arrow keys to navigate the grid and type numbers 1-9 to place them.
Sudoku Tips
- Scan rows and columns: Look for a number that already appears frequently on the board. Then, check which rows and columns are blocked off to find the only possible spot for that number in a 3×3 box.
- Use pencil marks: If you’re stuck, most digital versions let you take notes in the cells. Mark down all possible candidates for a tricky square to help visualize the remaining options.
- Start with crowded areas: Focus your attention on the 3×3 boxes, rows, or columns that are already mostly filled. With fewer missing numbers, the logical deductions are much easier to spot.