Puzzle Difficulty

Show Errors
Puzzle Difficulty
Set the level of difficulty puzzle you want. If you're currently in a game, the change won't take effect until you start a new one.

Show Errors
Choose whether or not to show your errors. If you select this, any wrong number you enter will appear in red instead of blue.

Insert numbers so that each row, column, and 3x3 box contain numbers 1 through 9.

Select a number from the bottom row by clicking it, typing the number, or scrolling the mouse wheel.

Toggle between marking or entering the numbers by clicking the checkmark or hitting the 'm' key.

Click a box to enter/mark that box. Click the box again to remove that mark/number.