It is a game known by Picture Logic and PICROSS.
The pattern concealed in the mass is solved getting a hint from the figure in surroundings.
The figure means putting on the mass with a consecutive stone.
There is one or more masses not put between those at all when there are two figures or more.
(operation)
click : stone -> ? -> X -> empty
drug : The content of the mass that begins the drug is copied onto the mass since the second.
End : It ends with the check button. ?It is not possible to end when there is a mark.