A shape is hidden. Cut the sheet and see how much fell each side.
How to play
A shape of a few cells is somewhere on the sheet. Touch two points on the edge and the cut runs between them.
Each side of the cut is printed with the share of the shape's area that fell there. A cut along the grid counts whole cells; a slanted one splits them and says more.
Under the sheet is how many shapes still fit every cut. When you know, mark the cells and reveal. A wrong reveal costs two cuts.