|Calcudoku size:||4×4||6×6||8×8||9×9||6×6||Killer Sudoku||Sudoku|
You can solve the puzzle using the number + arrow keys, or the mouse. Use shift + number to toggle guesses, the space bar to clear a cell, and 'backspace' for undo. Press '=' to highlight the number in a cell.
A Killer Sudoku is the same as a Calcudoku puzzle, except:
You can also solve the puzzles on the iPhone/iPod Touch/iPad and the Kindle 3.