Instructions

Objective

Fill a 9x9 grid with digits so that each row, column, and 3x3 subgrid contains all of the digits from 1 to 9 without any repeating sequences. As you fill the grid, cells will highlight red if there are duplicate digits within its vicinity.

The game uses the sugoku API to generate starting boards.

How to Play

Click on a cell to select it. You can also use the arrow keys on your keyboard to traverse the board.
While selected, you can click a number from the options below the board, or press a number key on your keyboard.
You can toggle Note Mode by clicking the Note button below or pressing 'n' on your keyboard.

To start a new game, select a difficulty and click the "New Game" button.

Be cautious with the "New Game" and "Reset" buttons - these will erase all your progress!

Sudoku