Welcome to Killer Sudoku Online's online killer sudoku game.

Keep values entered as entered sorted cursor movement return Move right up Move up down Move down left Move left right Move right cell contents 1-9 Toggle value Shift 1-9 Set value c Clear cell g Make cell a guess s Make cell a sure thing z Undo previous change (upto 30 undo's) space put a space in the cell

You can play killer sudoku online, right here! Move the cursor to a cell and enter the value that the cell should have. If you are not sure of a value, you can enter multiple values in a cell. If you enter a value in a cell that is already there, it will be removed.

If you have cookies enabled, you can save your current solution and come back to it later. Even if you don't explicitly save your solution, your work is autosaved. If you accidentally leave the page (e.g., you press backspace), and return before you exit the browser, you won't lose any work.

If you want some help generating the possible ways to create a sum, use the sum calculator button, which will pop up a window to help.

Good Luck!