The program «Sudoku-7» offers you the following possibilities: * play sudoku puzzle choosing seven levels of difficulty, save and load a game; * change the appearance of the table: * scale and skin (there are seven inbuilt skins and one external skin); * create your own skins by a tool «Skin maker«; * modify the appearance of the non-game part of the window: * background, tone and cursor color, moves list visibility, coordinate readout; * print a table.