This puzzle can be maddening. It is necessary to place on the board all the cells so that they were either black or gray. When starting the game, some of the cells are already placed, the more complex the current mission, the intricate shapes are arranged. Clicking on any of the cells, all cells crown away from her in the horizontal and vertical planes to change their color to the opposite. Using this trick, you need to find the right combination of action. Each step is recorded counter, fewer steps than is done, the higher the rating.