Daily Mini Sudoku

Every day a new mini Sudoku (6x6 and 8x8) in 4 difficulty levels. Solve according to the sudoku rules: a number (from 1-6 or 1-8) can only be used once in every row, column or box (3x2 or 4x2). Click once on the numpad to enter a candidate, click twice to enter a solution and click for the third time to remove a number from the cell. You can also use the keypad of your desktop (and arrow keys, del, tab and x).